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Dr Arunprakash Jayaprakash


My publications


Jayaprakash Arunprakash, Chen Hongzhi, Xiao Pei, Evans Barry G., Zhang Yingnan, Li Jing Yuan, Awoseyila Adegbenga (2019) Analysis of Candidate Waveforms for Integrated Satellite-Terrestrial 5G Systems,Proceedings of the 2019 IEEE 2nd 5G World Forum (5GWF?19)
Satellites will play an indispensable part in 5G roll
out and the common use of new radio (NR) air interface will
enable this. Satellite-terrestrial integration requires adaptations
to the existing NR standards and demands further study on the
potential areas of impact. From a physical layer perspective,
the candidate waveform has a critical role in addressing design
constraints to support non-terrestrial networks (NTN). In this paper,
the adaptability of frequency-localized orthogonal frequency
division multiplexing (OFDM)-based candidate waveforms and
solutions are discussed in the context of physical layer attributes
of non-linear satellite channel conditions. The performance of
the new air interface waveforms are analysed in terms of
spectral confinement, peak-to-average power ratio (PAPR), power
amplifier efficiency, robustness against non-linear distortions and
carrier frequency offset (CFO).
Jayaprakash Arunprakash, Evans Barry G., Xiao Pei, Awoseyila Adegbenga, Zhang Yingnan (2020) New Radio Numerology and Waveform Evaluation
for Satellite Integration into 5G Terrestrial Network
IEEE International Conference on Communications
This paper analyses the New Radio (NR) air interface
waveforms and numerologies in the context of current
activities and studies of 3GPP related to the feasibility and standardisation of necessary adaptations for the 5G NR to support integrated-satellite-terrestrial networks with low earth orbit (LEO) satellites. Frequency-localized orthogonal frequency
division multiplexing (OFDM)-based candidate waveforms are recommended by 3GPP as the waveforms for the NR in order to preserve the advantages of OFDM as well as maintain backward compatibility. 5G New Radio enables diverse service support, efficient synchronization and channel adaptability using a multinumerology
concept, which defines a family of parameters of the
parent waveform, that are related to each other by scaling. The major design challenges in the LEO satellite scenario are power limited link budget and high Doppler effects which can be addressed by choosing waveforms with small peak to average power ratio (PAPR) and sub-carrier bandwidth adaptation respectively.
Hence, the selection of the right waveform and numerology is of prime relevance for the proper adaptation of 5G NR for LEO satellite terrestrial integration. The performance evaluation of the new air interface waveforms, with different numerologies, are
carried out under the effect of carrier frequency offset (CFO), multipath effects, non-linearity, phase noise and additive white Gaussian noise (AWGN).

Additional publications