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Dr Juan Carlos De Luna Ducoing

My publications


Ma Y, De Luna Ducoing Juan Carlos, Yi N, Tafazolli R (2015) Using Real Constellations in Fully- and Over-loaded Large MU-MIMO Systems with Simple Detection,IEEE Wireless Communications Letters PP (99)
The aim of this letter is to exhibit some advantages of using real constellations in large multi-user (MU) MIMO systems. It is shown that a widely linear zero-forcing (WLZF) receiver with M-ASK modulation enjoys a spatial-domain diversity gain, which linearly increases with the MIMO size even in fully- and over-loaded systems. Using the decision of WLZF as the initial state, the likelihood ascent search (LAS) achieves nearoptimal BER performance in fully-loaded large MIMO systems. Interestingly, for coded systems, WLZF shows a much closer BER to that of WLZF-LAS with a gap of only 0:9-2 dB in SNR.
De Luna Ducoing Juan Carlos, Ma Yi, Yi Na, Tafazolli Rahim (2018) A Real-Complex Hybrid Modulation Approach for Scaling Up Multiuser MIMO Detection,IEEE Transactions on Communications 66 (9) pp. 3916-3929 Institute of Electrical and Electronics Engineers (IEEE)
In this paper, a novel approach, namely realcomplex
hybrid modulation (RCHM), is proposed to scale up
multiuser multiple-input multiple-output (MU-MIMO) detection
with particular concern on the use of equal or approximately
equal service antennas and user terminals. By RCHM, we mean
that user terminals transmit their data sequences with a mix of
real and complex modulation symbols interleaved in the spatial
and temporal domain. It is shown, through the system outage
probability, RCHM can combine the merits of real and complex
modulations to achieve the best spatial diversity-multiplexing
trade-off that minimizes the required transmit-power given a
sum-rate. The signal pattern of RCHM is optimized with respect
to the real-to-complex symbol ratio as well as power allocation.
It is also shown that RCHM equips the successive interference
canceling MU-MIMO receiver with near-optimal performances
and fast convergence in Rayleigh fading channels. This result is
validated through our mathematical analysis of the average biterror-
rate as well as extensive computer simulations considering
the case with single or multiple base-stations.
Georgis Georgios, Filo Marcin, Thanos Alexios, Husmann Christopher, De Luna Ducoing Juan Carlos, Tafazolli Rahim, Nikitopoulos Konstantinos (2019) SWORD: Towards a Soft and Open Radio Design
for Rapid Development, Profiling,
Validation and Testing
IEEE Access Institute of Electrical and Electronics Engineers
The vision, as we move to future wireless communication systems, embraces diverse qualities
targeting significant enhancements from the spectrum, to user experience. Newly-defined air-interface
features, such as large number of base station antennas and computationally complex physical layer
approaches come with a non-trivial development effort, especially when scalability and flexibility need to
be factored in. In addition, testing those features without commercial, off-the-shelf equipment has a high
deployment, operational and maintenance cost. On one hand, industry-hardened solutions are inaccessible
to the research community due to restrictive legal and financial licensing. On the other hand, researchgrade
real-time solutions are either lacking versatility, modularity and a complete protocol stack, or, for
those that are full-stack and modular, only the most elementary transmission modes are on offer (e.g., very
low number of base station antennas). Aiming to address these shortcomings towards an ideal research
platform, this paper presents SWORD, a SoftWare Open Radio Design that is flexible, open for research,
low-cost, scalable and software-driven, able to support advanced large and massive Multiple-Input Multiple-
Output (MIMO) approaches. Starting with just a single-input single-output air-interface and commercial
off-the-shelf equipment, we create a software-intensive baseband platform that, together with an acceleration/
profiling framework, can serve as a research-grade base station for exploring advancements towards
future wireless systems and beyond.