Dr Pei Xiao

Lecturer - Signal Processing for Wireless Communications

Email:
Phone: Work: 01483 68 9489
Room no: 48 BA 01

Further information

Publications

Journal articles

  • Wu J, Blostein SD, Chen Q, Xiao P. (2012) 'Joint time-frequency diversity for single-carrier block transmission in frequency selective channels'. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E95-A (11), pp. 1912-1920.
    doi: 10.1587/transfun.E95.A.1912
  • Xiao P, Tafazolli R, Moessner K, Gluhak A. (2012) 'Codebook Based Single-User MIMO System Design with Widely Linear Processing'. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE TRANSACTIONS ON COMMUNICATIONS, 60 (9), pp. 2408-2414.
    doi: 10.1109/TCOMM.2012.060112.110155
    Full text is available at: http://epubs.surrey.ac.uk/711385/
  • Xiao P, Fusco VF. (2012) 'Passive Phase Conjugation Applied to an OFDM-Based Terrestrial Communication System'. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 61 (5), pp. 2120-2129.
    doi: 10.1109/TVT.2012.2191165
    Full text is available at: http://epubs.surrey.ac.uk/745715/
  • Xiao P, Fusco V. (2012) 'Active phase conjugation with multiple antenna array element'. IET Microwaves, Antennas and Propagation, 6 (4), pp. 482-488.
    doi: 10.1049/iet-map.2011.0459
    Full text is available at: http://epubs.surrey.ac.uk/711751/

    Abstract

    In this study, the authors analyse the temporal and spatial compression characteristics of retrodirective antenna systems wherein active phase conjugation (APC) is deployed. It is shown that under the APC Hermitian channel matrix properties result and these lead to opportunities for both temporal and spatial signal compression. The effects of additive channel noise, as well as compression assistance given by multipath richness are described. Some general properties of retrodirective antenna systems with respect to linear and circular polarised pilot signals are also discussed. The scheme elaborated here is compliant with a generic channel model and can therefore be easily incorporated into any readily available communication systems analysis or channel modelling software. The work presented in this study provides a theoretical foundation for the previous experimental findings in APC systems. © 2012 The Institution of Engineering and Technology.

  • Wu J, Xiao P, Sellathurai M, Blostein S, Ratnarajah T. (2011) 'Joint complex diversity coding and channel coding over space, time and frequency'. IET IET SIGNAL PROCESSING, 5 (7), pp. 643-651.
    doi: 10.1049/iet-spr.2010.0196
    Full text is available at: http://epubs.surrey.ac.uk/290612/

    Abstract

    This study provides a general diversity analysis for joint complex diversity coding (CDC) and channel coding-based space-time-frequency codeing is provided. The mapping designs from channel coding to CDC are crucial for efficient exploitation of the diversity potential. This study provides and proves a sufficient condition of full diversity construction with joint three-dimensional CDC and channel coding, bit-interleaved coded complex diversity coding and symbol-interleaved coded complex diversity coding. Both non-iterative and iterative detections of joint channel code and CDC transmission are investigated. The proposed minimum mean-square error-based iterative soft decoding achieves the performance of the soft sphere decoding with reduced complexity.

  • Xiao P, Lin Z, Fagan A, Cowan C, Vucetic B, Wu Y. (2011) 'Frequency-domain equalization for OFDMA-based multiuser MIMO systems with improper modulation schemes'. EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING, Article number ARTN 73
    doi: 10.1186/1687-6180-2011-73
    Full text is available at: http://epubs.surrey.ac.uk/711752/
  • Xiao P, Yin W, Cowan C, Fusco V. (2011) 'VBLAST Detection Algorithms Utilizing Soft Symbol Estimate and Noncircular CAI'. IEEE IEEE Transactions on Signal Processing, 59 (5), pp. 2441-2447.
    doi: 10.1109/TSP.2011.2108292
    Full text is available at: http://epubs.surrey.ac.uk/290303/

    Abstract

    We address the problem of error propagation inherent in the VBLAST detection process. To this end, two improved VBLAST schemes are proposed. The first one replaces hard decision with soft decision; whereas the other also utilizes soft symbol estimate, but in the meantime exploits the noncircular nature of the residual co-antenna interference (CAI) and noise, it involves refining the error criterion and nulling filter. Simulation results show that both schemes outperform their conventional counterpart and utilization of noncircular CAI significantly alleviates the error propagation problem and improves the performance of the VBLAST detection.

  • Zhou H, Xiao P. (2011) 'Robust multiuser detection using Kalman filter and windowed projection approximation subspace tracking algorithm'. IET IET Communications, 5 (4), pp. 495-504.
    doi: 10.1049/iet-com.2009.0566
    Full text is available at: http://epubs.surrey.ac.uk/290268/

    Abstract

    "The authors propose some robust adaptive multiuser detection schemes for direct-sequence code-division multipleaccess multipath frequency-selective fading channels. Multiple access interference (MAI) and intersymbol interference (ISI) are presented in an identical format using expanded signal subspace, which facilitates multiuser detection in a symbol-bysymbol fashion. This study contributes to the theoretical aspect of adaptive multiuser detection by proving that the optimum linear multiuser detectors that achieve maximum signal-to-interference-plus-noise ratio (SINR) must exist in the signal subspace, and the theoretic SINR upper bound is also derived. Another contribution of this study is to propose the design of multiuser detectors in an expanded signal subspace, and introduce subspace estimation and Kalman filtering algorithms for their adaptive implementation. To robustify the adaptive detectors against subspace estimation and channel estimation errors, a modified projection approximation subspace tracking (PAST) algorithm is proposed for subspace tracking. It is demonstrated by simulations that these adaptive detectors effectively suppress both MAI and ISI and converge to the optimum SINR. They are robust against subspace estimation errors and channel estimation errors compared to the conventional Wiener minimum mean square error (MMSE) detector."

  • Xiao P, Wu J, Cowan CFN. (2011) 'MIMO Detection Schemes with Interference and Noise Estimation Enhancement'. IEEE IEEE Transactions on Communications, 59 (1), pp. 26-32.
    doi: 10.1109/TCOMM.2010.110310.090195A
    Full text is available at: http://epubs.surrey.ac.uk/290229/

    Abstract

    Different detection schemes for multiple-input, multiple-output (MIMO) systems are investigated. By enhancing the interference and noise estimation, we propose a novel MIMO receiver strategy, which is shown to achieve superior performance with moderate increase in computational complexity compared to conventional MIMO detection schemes.

  • Lin Z, Xiao P, Wu Y. (2011) 'Performance analysis for linearly precoded LTE downlink multiuser MIMO'. Eurasip Journal on Wireless Communications and Networking, 2011
    doi: 10.1155/2011/797840
  • Xiao P, Zhang H, Cowan C. (2011) 'Equalization of rotationally variant signals'. Optoelectronics, Instrumentation and Data Processing, 47 (3), pp. 253-263.
    doi: 10.3103/S8756699011030083
  • Lin Z, Xiao P, Sorensen TB, Vucetic B. (2010) 'Spatial Frequency Scheduling for Uplink SC-FDMA based Linearly Precoded LTE Multiuser MIMO System'. Wiley European Transactions on Telecommunications, 21 (3)
    doi: 10.1002/ett.1372
  • Khoo BK, Xiao P, Le Goff S, Sharif B, Tsimenidis C. (2010) 'A Low Complexity Transmit Diversity Scheme Using Moderate-Sized Constellations'. IET IET Electronic Letters, 46 (6), pp. 460-462.
    doi: 10.1049/el.2010.2987
    Full text is available at: http://epubs.surrey.ac.uk/711753/

    Abstract

    In the conventional space-time coding technique, nT radio frequency (RF) chains are employed to transmit signals simultaneously from nT transmit antennas. A low-complexity transmit diversity scheme with nT=2 transmit antennas is proposed, which employs only one RF chain as well as a low-complexity switch for transmission.

  • Xiao P, Sellathurai M. (2010) 'Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems'. IEEE IEEE Transactions on Signal Processing, 58 (3), pp. 1768-1779.
    doi: 10.1109/TSP.2009.2037347
    Full text is available at: http://epubs.surrey.ac.uk/290071/

    Abstract

    In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.

  • Xiao P, Strom E. (2010) 'Soft Demodulation Algorithms for Orthogonally Modulated and Convolutionally Coded DS-CDMA System'. IEEE IEEE Transactions on Communications, 58 (3), pp. 742-747.
    doi: 10.1109/TCOMM.2010.03.080049
    Full text is available at: http://epubs.surrey.ac.uk/290118/

    Abstract

    A convolutionally coded M-ary orthogonal direct sequence code division multiple access (DS-CDMA) system in time-varying frequency-selective Rayleigh fading channels is considered in this work. We propose several novel soft demodulation algorithms based on interference cancellation and suppression techniques that can be coupled with soft decoding to improve the system performance in an iterative manner. The performance of the proposed demodulation algorithms is evaluated numerically and proved to achieve substantial bit error rate (BER) performance gain compared with the conventional detection schemes.

  • Lin Z, Xiao P, Vucetic B, Sellathurai M. (2010) 'Analysis of Receiver Algorithms for LTE SC-FDMA Based Uplink MIMO Systems'. IEEE IEEE Transactions on Wireless Communications, 9 (1), pp. 60-65.
    doi: 10.1109/TWC.2010.01.090199
    Full text is available at: http://epubs.surrey.ac.uk/290021/

    Abstract

    This letter derives mathematical expressions for the received signal-to-interference-plus-noise ratio (SINR) of uplink Single Carrier (SC) Frequency Division Multiple Access (FDMA) multiuser MIMO systems. An improved frequency domain receiver algorithm is derived for the studied systems, and is shown to be significantly superior to the conventional linear MMSE based receiver in terms of SINR and bit error rate (BER) performance.

  • Liu R, Xiao P, Elmirghani J, Cowan C. (2009) 'Interference Cancellation Schemes for MIMO MC-CDM in Fading Channels'. IET IET Electronic Letters, 45 (24), pp. 1229-1231.
    doi: 10.1049/el.2009.9505
    Full text is available at: http://epubs.surrey.ac.uk/711754/

    Abstract

    A novel interference cancellation (IC) scheme for MIMO MC-CDM systems is proposed. It is shown that the existing IC schemes are suboptimum and their performance can be improved by utilising some special properties of the residual interference after interference cancellation.

  • Fa R, Xiao P. (2009) 'Joint Data Detection and Phase Recovery for Downlink MC-2D-CDMA Systems'. IEEE IEEE Transactions on Communications, 57 (9), pp. 2782-2789.
    doi: 10.1109/TCOMM.2009.09.080131
    Full text is available at: http://epubs.surrey.ac.uk/290337/

    Abstract

    The performance of a downlink synchronous MCCDMA system with joint frequency-time domain spreading (MC-2D-CDMA) is investigated in this paper. We propose a two dimensional adaptive minimum mean square error (MMSE) receiver, which works in decision-directed mode after an initial training period. A subcarrier phase tracker, which comprises a bank of phase locked-loops (PLLs), is employed in the receiver to track the fading phase variability. Furthermore, a simplified phase tracker structure is proposed to reduce the system complexity. The performance of the data detector and the behavior of the phase tracker are analyzed theorectically in this paper and are shown to match the simulation results. Both analysis and simulation indicate that the proposed system outperforms the conventional MC-DS-CDMA systems by exploiting frequency diversity and facilitating subcarrier synchronization.

  • Yin W, Xiao P. (2009) 'Optimal Power Allocation Strategy for TBLAST based 4G System'. Scientific Research Publishing Inc International Journal of Engineering, 1 (2), pp. 91-98.
    doi: 10.4236/eng.2009.12010
  • Xiao P, Wu J, Sellathurai M, Ratnarajah T, Strom E. (2009) 'Iterative Multi-User Detection and Decoding for DS-CDMA System with Space-Timer Linear Dispersion'. IEEE IEEE Transactions on Vehicular Technology, 58 (5), pp. 2343-2353.
    doi: 10.1109/TVT.2008.2008652
    Full text is available at: http://epubs.surrey.ac.uk/290585/

    Abstract

    This paper considers a Q-ary orthogonal direct-sequence code-division multiple-access (DS-CDMA) system with high-rate space-time linear dispersion codes (LDCs) in time-varying Rayleigh fading multiple-input-multiple-output (MIMO) channels. We propose a joint multiuser detection, LDC decoding, Q-ary demodulation, and channel-decoding algorithm and apply the turbo processing principle to improve system performance in an iterative fashion. The proposed iterative scheme demonstrates faster convergence and superior performance compared with the V-BLAST-based DS-CDMA system and is shown to approach the single-user performance bound. We also show that the CDMA system is able to exploit the time diversity offered by the LDCs in rapid-fading channels.

  • Xiao P, Sellathurai M. (2009) 'Application of Jacobi Algorithm for ISI Channels'. IET IET Signal Processing, 3 (2), pp. 119-132.
    doi: 10.1049/iet-spr:20080062
    Full text is available at: http://epubs.surrey.ac.uk/290485/

    Abstract

    Here, the Jacobi iterative algorithm is applied to combat intersymbol interference (ISI) caused by frequency-selective channels. The performance bound of the equaliser is analysed in order to gain an insight into its asymptotic behaviour. Because of the error propagation problem, the potential of this algorithm is not reached in an uncoded system. However, its extension to a coded system with the application of the turbo-processing principle results in a new turbo equalisation algorithm, which demonstrates comparable performance with reduced complexity compared with some existing filter-based turbo equalisation schemes; and superior performance compared with some frequency domain solutions, such as orthogonal frequency division multiplexing and single-carrier frequency domain equalisation.

  • Xiao P, Carrasco R, Wassell IJ. (2009) 'Generalized Equalization Algorithm Utilizing Improper ISI.'. IEEE IEEE Transactions on Vehicular Technology, 58 (2), pp. 788-789.
    doi: 10.1109/TVT.2008.927727
    Full text is available at: http://epubs.surrey.ac.uk/290435/

    Abstract

    The improper nature of intersymbol interference (ISI) for signals transmitted over frequency-selective channels is investigated in this paper. Our analysis reveals that for real signals, the improperness originates from both improper signal modulation and the interference cancellation process, whereas for most complex signals, the improperness is only a characteristic of the residual ISI due to interference cancellation. To utilize the improperness of ISI, a multistage widely linear equalization algorithm is introduced, and it is generally applicable for both real and complex signal constellations. The results reveal that accounting for the improper nature of the ISI at both the input and output of the equalizer leads to a noticeable performance gain compared with conventional equalization schemes.

  • Liu W, Sellathurai M, Xiao P, Wei J. (2008) 'A New Restricted Full-Rank Single-Symbol Decodable Design for Four Transmit Antennas'. IEEE IEEE Signal Processing Letters, 15, pp. 765-768.
    doi: 10.1109/LSP.2008.2006713
  • Xiao P, Barbero LG, Sellathurai M, Ratnarajah T. (2008) 'On the Uncoded BER Performance Bound of the IEEE 802.16d Channel'. IEEE IEEE Signal Processing Letters, 15, pp. 561-564.
    doi: 10.1109/LSP.2008.2001118
    Full text is available at: http://epubs.surrey.ac.uk/290375/

    Abstract

    In this letter, the performance bound of the IEEE 802.16d channel is examined analytically in order to gain an insight into its theoretical potential. Different design strategies, such as orthogonal frequency division multiplexing (OFDM) and single-carrier frequency-domain equalization (SC-FDE), time-domain decision feedback equalization (DFE), and sphere decoder (SD) techniques are discussed and compared to the theoretical bound.

  • Xiao P, Liu R. (2008) 'Multi-user Detector for Multi-carrier CDMA Systems'. IET IET Electronic Letters, 44 (23), pp. 1366-1368.
    doi: 10.1049/el:20082130
    Full text is available at: http://epubs.surrey.ac.uk/711755/

    Abstract

    A novel blind multi-user detection scheme is developed, which shows clear superiority to the conventional subspace-based blind multi-user detector by improving the condition of the signal subspace. The performance advantages are shown to be more obvious as the number of active users increases, which makes it an attractive solution in heavily loaded systems.

  • Zhou H, Xiao P, Woo WL, Sharif BS. (2008) 'Expanded Decorrelating Detector with Reduced Noise Enhancement for Multiuser Detection in Multipath Frequency-Selective Fading Channel'. IET IET Communications, 2 (1), pp. 164-173.
    doi: 10.1049/iet-com:20070200
    Full text is available at: http://epubs.surrey.ac.uk/289944/

    Abstract

    A novel hybrid multiuser detection scheme that jointly uses linear and nonlinear interference suppression techniques is developed for high-speed direct-sequence code-division multiple-access communications in multipath frequency-selective fading channels. The detector detects signals in a symbol-by-symbol style. Conventional decorrelating detectors suffer from the noise enhancement problem, which becomes more serious for dispersive multipath channels. The proposed detector uses interference cancellation technology to reduce the rank of the expanded signal subspace and hence it preserves the advantages of the expanded decorrelating detector in terms of complete multiple access interference and intersymbol interference suppression and meanwhile avoids its disadvantage in terms of noise enhancement. Computer simulation shows clear superiority of the new detector to other existing methods.

  • Xiao P, Carrasco R, Wassell I. (2007) 'Iterative Equalization and TCM Decoding with Refined Channel Value'. IEEE Transactions on Wireless Communications, 6 (11), pp. 3920-3925.
  • Xiao P, Carrasco R, Wassell I. (2007) 'Theoretical Analysis of Single and Multiple antenna FWA Systems'. IET Communications, 1 (3), pp. 496-506.
  • Xiao P, Strom E. (2007) 'Joint Data Detection and Estimation of Time-Varying Multipath Rayleigh fading Channels in Asynchronous DS-CDMA Systems with Long Spreading Sequences'. European Transactions on Telecommunications, 18 (2), pp. 115-132.
  • Xiao P, Carrasco R, Wassell I. (2007) 'Bit Error Rate Evaluation of Linear Equalization in BFWA Systems'. International Journal of Communication Systems, 20 (2), pp. 235-246.
  • Xiao P, Strom E. (2006) 'Correction of Extrinsic Information for Iterative Decoding in Serially Concatenated DS-CDMA Systems'. IEEE Transactions on Wireless Communications, 5 (3), pp. 591-602.
  • Xiao P, Strom E. (2006) 'Iterative Demodulation of M-ary Orthogonal Signaling Formats in Coded DS-CDMA Systems with Soft Interference Cancellation and Channel Estimation'. IEICE Transactions on Communications, E89-B (1), pp. 150-161.
  • Xiao P, Strom E. (2005) 'A Theoretical Evaluation of Parallel Interference Cancellation in M-ary Orthogonal Modulated Asynchronous DS-CDMA System over Multipath Rayleigh Fading Channels'. IEEE Transactions on Vehicular Technology, 54 (4), pp. 1400-1414.
  • Xiao P, Strom E. (2003) 'Pilot-Aided Acquisition Algorithms for Asynchronous DS-CDMA Systems'. European Transactions on Telecommunications, 14 (1), pp. 89-96.

Conference papers

  • Xiao P, Wu J, Chen Q. (2012) 'Decoding algorithms for 3-D space-time-frequency codes'. Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11, Guilin: 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11, pp. 185-188.
    doi: 10.1109/IWSDA.2011.6159421
  • Zeng T, Chen Q, Xiao P, Wu J. (2012) 'MSINR based precoding design for non-regenerative MIMO relay system'. 2012 1st IEEE International Conference on Communications in China, ICCC 2012, , pp. 508-513.
    doi: 10.1109/ICCChina.2012.6356936
  • Chen Y, Lin Z, Xiao P, Dianati M. (2012) 'Average per-user rate for MIMO systems with SDM-FDPS'. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, , pp. 698-702.
    doi: 10.1109/PIMRC.2012.6362874
  • Sohail A, Xiao P, Evans BG. (2012) 'Optimal power allocation scheme under FSA constraint for OFDM based cognitive radio systems'. International Congress on Ultra Modern Telecommunications and Control Systems and Workshops, , pp. 195-200.
    doi: 10.1109/ICUMT.2012.6459663
  • Abidin ZU, Xiao P, Amin M, Fusco V. (2012) 'Circular polarization modulation for digital communication systems'. Proceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012,
    doi: 10.1109/CSNDSP.2012.6292758
  • Xiao P, Khoo BK, Le Goff SY, Scanlon W. (2012) 'BER evaluation of a low complexity transmit diversity scheme and its application to MIMO-BICM'. Proceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012,
    doi: 10.1109/CSNDSP.2012.6292757
  • Xiao P, Lin Z, Cowan C. (2011) 'Suboptimal and Optimal MIMO-OFDM Iterative Detection Schemes'. Proceedings of the Global Communications Conference, 2010. GLOBECOM 2010, Miami, Florida: IEEE Globecom 2010
    doi: 10.1109/GLOCOM.2010.5683263
  • Wu J, Xiao P, Chen Q, Blostein SD. (2011) 'Three-dimensional combined diversity coding and error control coding: Code design and diversity analysis'. 11th International Symposium on Communications and Information Technologies, ISCIT 2011, , pp. 7-12.
    doi: 10.1109/ISCIT.2011.6092188
  • Xiao P, Tafazolli R, Yin W, Shaker SW. (2011) 'Enhanced subspaced approach to interference mitigation'. 11th International Symposium on Communications and Information Technologies, ISCIT 2011, , pp. 13-17.
    doi: 10.1109/ISCIT.2011.6089717
  • Xiao P, Wu J, Chen Q. (2011) 'Decoding algorithms for 3-D space-time-frequency codes'. Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11, , pp. 185-188.
    doi: 10.1109/IWSDA.2011.6159421
  • Xiao P, Tafazolli R, Khoo BK, Le Goff SY. (2011) 'Theoretical analysis of repetition time-switched transmit diversity scheme'. 11th International Symposium on Communications and Information Technologies, ISCIT 2011, , pp. 211-216.
    doi: 10.1109/ISCIT.2011.6089735
  • Khoo BK, Goff SL, Xiao P. (2011) 'Repetition time-switched transmit diversity as an alternative to Alamouti space-time coding for wireless communication systems'. 2011 the 14th International Symposium on Wireless Personal Multimedia Communications: Communications, Networking and Applications for the Internet of Things, WPMC'11,
  • Xiao P, Fusco V, Sundaralingam P. (2011) 'Analysis of temporal compression characteristics using active phase conjugation in systems with multiple antenna elements'. Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011, , pp. 297-300.
  • Xiao P, Chen Q. (2011) 'Optimization of MIMO transceiver with limited feedback channel'. Proceedings of the 5th International Workshop on Signal Design and Its Applications in Communications, IWSDA'11, , pp. 169-172.
    doi: 10.1109/IWSDA.2011.6159416
  • Xiao P, Toal C, Burns D, Fusco V, Cowan C. (2010) 'Transmit and Receive Filter Design For OFDM Based WLAN Systems'. IEEE International Conference on Wireless Communications and Signal Processing (WCSP), 2010, Suzhou: International Conference on Wireless Communications and Signal Processing, WCSP'2010
    doi: 10.1109/WCSP.2010.5633476
  • Yin W, Xiao P, Cowan C. (2010) 'Grubbs and Wright Algorithms for WiMAX and LTE Systems'. IEEE International Conference on Wireless Communications and Signal Processing (WCSP), 2010, Suzhou: International Conference on Wireless Communications and Signal Processing, WCSP'2010
    doi: 10.1109/WCSP.2010.5633463
  • Zhou H, Xiao P, Cowan C. (2010) 'Robust Adaptive Multiuser Detection for CDMA Frequency-Selective Fading Channels'. Vehicular Technology Conference Fall (VTC 2010-Fall), Ottawa: IEEE Vehicular Technology Conference
    doi: 10.1109/VETECF.2010.5594399
  • Xiao P, Lin Z, Cowan C. (2010) 'Analysis of Channel Capacity for LTE Downlink Multiuser MIMO Systems'. IEEE Vehicular Technology Conference Fall (VTC 2010-Fall), Belfast: IEEE Vehicular Technology Conference
    doi: 10.1109/VETECF.2010.5594124
  • Xiao P, Sellathuai M, Cowan C. (2010) 'Advanced Linear Processing for 2-Hop Fixed MIMO Relaying'. IEEE International Conference on Signal Processing and Communications (SPCOM), 2010, Bangalore: IEEE International Conference on Signal Processing and Communications, SPCOM'2010
    doi: 10.1109/SPCOM.2010.5560506
  • Xiao P, Cowan C, Ratnarajah T, Fagan A. (2010) 'Time Synchronization Algorithms for IEEE 802.11 OFDM Systems'. IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2009), Shanghai, China: IET International Communication Conference on Wireless Mobile Computing, pp. 287-290.
  • Barbero L, Xiao P, Ratnarajah T, Sellathurai M. (2010) 'A Sphere Decoder with Approximate QR Decomposition for Frequency-Selective Channels'. IEEE 2010 IEEE International Conference on Communications (ICC), IEEE International Conference on Communications, ICC'2010
    doi: 10.1109/ICC.2010.5502539
  • Lin Z, Xiao P, Vucetic B, Cowan C. (2010) 'Multiuser Scheduler and FDE Design for SC-FDMA MIMO Systems'. 2010 IEEE International Conference on Communications (ICC), IEEE International Conference on Communications, ICC'2010
    doi: 10.1109/ICC.2010.5501880
  • Xiao P, Zhang H, Cowan C. (2010) 'Widely Linear Equalization of Rotationally Variant Signals'. The IASTED International Conference on Communication Technology, pp. 62-68.
  • Yin W, Xiao P, Cowan C, Liu S, Huang Q. (2010) 'ORL Scheme for WiMAX and LTE Systems with Convolutionally Coded Spatial Multiplexing'. The IASTED International Conference on Communication Technology, pp. 173-176.
  • Xiao P, Fusco V, Cowan C. (2010) 'Simulink Models for OFDM Based Wireless LAN System'. Royal Irish Academy Colloquium Proceedings, Royal Irish Academy Colloquium on Wireless as an Enabling Technology, pp. 109-112.
  • Xiao P, Cowan C, Ratnarajah T, Fusco V, Fagan A. (2010) 'Soft Demapping for IEEE 802.11 OFDM System'. Royal Irish Academy Colloquium Proceedings, Royal Irish Academy Colloquium on Wireless as an Enabling Technology, pp. 43-46.
  • Xiao P, Sellathurai M. (2009) 'Iterative Receiver Design for MIMO Systems with Improper Signal Constellations'. IEEE IEEE International Conference on Communications, 2009. ICC '09., Dresden: IEEE International Conference on Communications
    doi: 10.1109/ICC.2009.5199106
  • Xiao P, Wu J, Sellathurai M, Ratnarajah T. (2009) 'On The Performance of Space-Time Coded Multiuser MIMO Systems with Iterative Receivers'. IEEE IEEE 69th Vehicular Technology Conference Spring 2009, Barcelona: IEEE Vehicular Technology Conference
    doi: 10.1109/VETECS.2009.5073736
  • Lin Z, Xiao P, Vucetic B. (2009) 'SINR Distribution for LTE Downlink Multiuser MIMO Systems'. IEEE IEEE International Conference on Acoustics, Speech and Signal Processing, 2009. ICASSP 2009, Taipei: IEEE ICASSP, pp. 2833-2836.
    doi: 10.1109/ICASSP.2009.4960213
  • Liu W, Sellathurai M, Xiao P, Tang C, Wei J. (2009) 'Improved Design of Two and Four-group Decodable STBCs with Larger Diversity Product for Eight Transmit Antennas'. IEEE IEEE International Conference on Acoustics, Speech and Signal Processing, 2009. ICASSP 2009, Taipei: IEEE ICASSP, pp. 2737-2740.
    doi: 10.1109/ICASSP.2009.4960189
  • Xiao P, Sellathurai M. (2008) 'Application of Jacobi Algorithm in Frequency Selective Channels'. IEEE IEEE International Conference on Communications, 2008. ICC '08, Beijing: IEEE International Conference on Communications, pp. 886-890.
    doi: 10.1109/ICC.2008.174
  • Xiao P, Sellathurai M. (2008) 'Analysis of A Simplified Channel Estimator for MIMO Frequency Selective Channels'. IEEE IEEE Vehicular Technology Conference,VTC Spring 2008, Singapore: IEEE VTC'2008 Spring, pp. 988-993.
    doi: 10.1109/VETECS.2008.212
  • Xiao P, Chatzigeorgiou I, Carrasco R, Wassell I. (2007) 'Comparison of Frequency And Time Domain Schemes for MIMO Broadband Fixed Wireless Access'. IEEE Washington, DC: IEEE Globecom, pp. 3051-3056.
    doi: 10.1109/GLOCOM.2007.578
  • Xiao P, Sellathurai M, Ratnarajah T. (2007) 'A Low Complexity Scheme for Transmit Diversity Over Frequency Selective Channels'. IEEE GLOBECOM '07, Washington DC: IEEE Globecom, pp. 4086-4090.
    doi: 10.1109/GLOCOM.2007.777
  • Xiao P, Carrasco R, Wassell I. (2007) 'A Novel Multistage Equalization Algorithm'. IEEE Glasgow: IEEE International Conference on Communications, pp. 2630-2634.
    doi: 10.1109/ICC.2007.436
  • Xiao P, Carrasco R, Wassell I. (2007) 'A Comparative Study of Adaptive and Non-adaptive Turbo Equalizers'. International Symposium on Communication Theory and Applications
  • Xiao P, Carrasco R, Wassell I. (2007) 'On The Asymptotic Performance of The STBC Coded FWA Systems'. San Francisco, CA: IEEE Globecom
    doi: 10.1109/GLOCOM.2006.536
  • Xiao P, Carrasco R, Wassell I. (2007) 'Estimation of FWA MIMO Channels'. IEEE Chengdu: IEEE Information Theoy Workshop, pp. 641-645.
    doi: 10.1109/ITW2.2006.323713
  • Xiao P, Carrasco R, Wassell I. (2007) 'Time Reversal Space-Time Block Coding for FWA Systems'. IEEE Wireless and Mobile Communications, 2006. ICWMC '06., IEEE International Conference on Wireless and Mobile Communications
    doi: 10.1109/ICWMC.2006.90
  • Xiao P, Carrasco R, Wassell I. (2007) 'EXIT Chart Anlaysis of Space-Time Turbo Equalizer'. IEEE Information Theory Workshop, 2006. ITW '06, Chengdu: IEEE Information Theory Workshop, pp. 631-635.
    doi: 10.1109/ITW2.2006.323711
  • Xiao P, Carrasco R, Wassell I. (2007) 'Turbo Equalization For Space-Time Block Coded FWA Systems'. IEEE Punta del Este, Uruguay: IEEE Information Theory Workshop, pp. 626-630.
    doi: 10.1109/ITW.2006.322894
  • Xiao P, Carrasco R, Wassell I. (2007) 'High Data Rate Broadband Fixed Wireless Access with Multilevel Modulation'. World Wireless Congress
  • Xiao P, Carrasco R, Wassell I. (2006) 'Improved Equalization Algorithm for Broadband Fixed Wireless Access'. International Symposium on Broadband Communications
  • Xiao P, Carrasco R, Wassell I. (2006) 'Filter-Based Turbo Equalization for TCM Signals'. IEEE Global Telecommunications Conference, 2005. GLOBECOM '05., IEEE Globecom, pp. 1407-1411.
    doi: 10.1109/GLOCOM.2005.1577883
  • Xiao P, Strom E, Carrasco R. (2006) 'BER Performance Analysis of Multistage PIC Scheme in Asynchronous DS-CDMA System over Unbalanced Multipath Fading Channels'. IEEE IEEE Global Telecommunications Conference, 2005. GLOBECOM '05., St. Louis, MO: IEEE Globecom, pp. 3763-3767.
    doi: 10.1109/GLOCOM.2005.1578474
  • Xiao P, Carrasco R, Wassell I. (2006) 'WLP for Broadband Fixed Wireless Access'. XII Congreso Internacional de Telecomunicaciones
  • Xiao P, Carrasco R, Wassell I. (2005) 'Turbo Equalization without MMSE Filtering'. International Symposium on DSP and Communication Systems
  • Xiao P, Carrasco R, Wassell I. (2005) 'Equalization of BFWA Channels: Theory and Analysis'. Ambleside, England: Eighth International Symposium on Communication Theory and Applications, pp. 404-408.
  • Xiao P, Strom E, Carrasco R. (2005) 'Soft Demodulation with Interference Cancellation/Suppression for M-ary DS-CDMA System'. The IASTED International Conference on Communication Systems
  • Xiao P, Carrasco R, Wassell I. (2005) 'Equalization and Decoding Algorithms in Broadband Fixed Wireless Access'. Acta Press ACIT - Communication Systems (ACIT-CS 2005), Novosibirsk, Russia: The IASTED International Conference on Communication Systems
  • Xiao P, Carrasco R, Wassell I. (2005) 'Performance Analysis of Conventional Detection in BFWA Systems'. IEEE Second IFIP International Conference on Wireless and Optical Communications Networks, pp. 447-452.
    doi: 10.1109/WOCN.2005.1436066
  • Xiao P, Strom E, Carrasco R. (2005) 'Comparison of Different Soft Demodulation and Decoding Algorithms in Coded M-ary Orthogonal DS-CDMA Systems'. IEEE Wireless and Optical Communications Networks, 2005, Second IFIP International Conference on Wireless and Optical Communications Networks, pp. 578-583.
    doi: 10.1109/WOCN.2005.1436092
  • Xiao P, Carrasco R, Wassell I. (2004) 'Equalization and Decoding in BFWA Systems'. Harrogate: The First International Symposium on Broadband Communications, ISBC'04, pp. 12-15.
  • Xiao P, Strom E, Carrasco R. (2004) 'Estimation of Time-Varying Multipath Rayleigh Fading Channels in Asynchronous DS-CDMA Systems'. IEEE PIMRC 4, pp. 2570-2575.
    doi: 10.1109/PIMRC.2004.1368784
  • Xiao P, Strom E. (2004) 'BER Performance Analysis of Multistage PIC Scheme in An Asynchronous DS-CDMA System with Long Scrambling Codes'. IEEE VTC 2, pp. 952-957.
    doi: 10.1109/VETECS.2004.1388971
  • Xiao P, Strom E. (2004) 'Soft Interference Cancellation and Channel Estimation in Uncoded Asynchronous DS-CDMA System'. IEEE VTC 3, pp. 1688-1692.
    doi: 10.1109/VETECS.2004.1390543
  • Xiao P, Strom E. (2003) 'Integrated Approach to Demodulation and Decoding of Convolutionally Coded and Orthogonally Modulated DS-CDMA Signals'. WPMC, pp. 122-126.
  • Xiao P, Strom E. (2003) 'Delay Estimation and Data Detection in Long-Code DS-CDMA System'. The 9th Asia-Pacific Conference on Communication 2, pp. 584-589.
    doi: 10.1109/APCC.2003.1274425
  • Xiao P, Strom E. (2003) 'Multiuser Detection and Channel Estimation Algorithms for M-ary DS-CDMA Systems in Multipath Rayleigh Fading Channels'. IEEE PIMRC 2, pp. 1829-1834.
    doi: 10.1109/PIMRC.2003.1260431
  • Xiao P, Strom E. (2002) 'Applications of Maximum Likelihood Algorithm in Asynchronous CDMA Systems'. IEEE International Symposium on Spread Spectrum Techniques and Applications 1, pp. 208-213.
    doi: 10.1109/ISSSTA.2002.1049316
  • Xiao P, Strom E, Orten P, Svensson A. (2002) 'Pulse Shaping Considerations in DS-CDMA Systems with Long Spreading Sequences'. IEEE International Symposium on Intelligent Signal Processing and Communication Systems
  • Xiao P, Strom E. (2002) 'Performance of Iterative DS-CDMA M-ary Demodulation in The Presence of Synchronization Errors'. IEEE IEEE 53rd VTC Spring 2001, Rhodes: IEEE VTC 3, pp. 1703-1707.
    doi: 10.1109/VETECS.2001.944985
  • Xiao P, Strom E. (2002) 'Synchronization Algorithms for Iterative Demodulated M-ary DS-CDMA Systems'. IEEE GLOBECOM'01, San Antonio, TX: IEEE Globecom 2, pp. 1371-1375.
    doi: 10.1109/GLOCOM.2001.965713
  • Xiao P, Strom E. (2002) 'Acquisition of Orthogonal Modulated Signals in Rayleigh-Fading Channels'. Florence Italy: European Wireless, pp. 811-816.
  • Xiao P, Raitinen H, Gabbouj M. (1998) 'Blind Deconvolution for Blurred Image Restoration with Simulated Annealing'. Leuven, Belgium: International Workshop on Advanced Black-Box Techniques for Nonlinear Modelling, pp. 170-173.
  • Xiao P, Gabbouj M. (1997) 'Robust Image Contour Detection by Watershed Transformation'. IEEE Workshop on Nonlinear Signal and Image Processing, pp. 315-319.
  • Xiao P, Alina M, Gabbouj M. (1996) 'Segmentation of Noisy Images with Watershed Transformation'. IEEE Nordic Signal Processing Symposium, pp. 263-265.

Book chapters

  • Xiao P, Lin Z, Mao J. (2012) 'MIMO Transmit Diversity: Theoretical Analyses and Practical Applications'. in Le KN (ed.) Orthogonal Frequency Division Multiplexing with Diversity for Future Wireless Systems BeTham Science Publisher Article number 5
  • Mao J, Lin Z, Xiao P. (2012) 'Mobile WiMAX Downlink MIMO Beamforming Algorithms and Simulations'. in Le KN (ed.) Orthogonal Frequency Division Multiplexing with Diversity for Future Wireless Systems BeTham Science Publisher Article number 11
  • Wu J, Xiao P. (2009) 'OFDMA-based Mobile WiMAX'. in Song L, Jiang T, Zhang Y (eds.) Orthogonal Frequency Division Multiple Access Fundamentals and Applications Auerbach Publications Article number 22
  • Xiao P, Chatzigeorgiou I, Rodrigues M, Carrasco R, Wassell I. (2009) 'Design Considerations and Algorithms for Broadband Fixed WiMAX Systems'. in Watanabe K (ed.) VLSI and Computer Architecture Nova Science Publishers Article number 3
  • Wu J, Xiao P, Sellahuai M, Blostein S. (2009) 'Linear Dispersion Codes for Wireless Communications.'. in Feng J (ed.) Wireless Networks: Research, Technology, and Applications Nova Science Pub Inc Article number 4

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