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Title: Realtime parallel software implementation of a DS-CDMA Multiuser Detector
Author: Gonçalves, Luís Carlos
Martins, Rui Escadas
Ferrari, António Brito
Keywords: Heterogeneous computing
Real time implementation
High performance computing
Frequency shift canceller
Parallel interference canceller
Multiuser detection
Issue Date: Jul-2021
Publisher: Elsevier
Abstract: In this article the complexity and runtime performance of two Multiuser Detectors for Direct Sequence-Code Division Multiple Access were evaluated in two different hardware platforms. The innovation and aim is to take advantage of present parallel hardware to bring Multiuser technology to present and future Base Stations in order to increase the capacity of the overall system, to reduce the transmission power by the mobile stations and to reduce base station hardware requirements, in Universal Mobile Telecommunications System. The detectors are based on the Frequency Shift Canceller concatenated with a Parallel Interference Canceller. This detector implies the inversion of multiple identical size small matrices and because of that it is very scalable contrary to other solutions/detectors that only permit a sequential implementation despite their lower complexity. Implementations for the Time Division-Code Division Multiple Access, in two software platforms one in OpenMP and the other in CUDA were done taking into account the carrier and doppler frequency offsets (offset different for each user). The result shows that this deployment aware real-time implementation of the Multiuser Detectors is possible with a Graphics Processor Unit being three times faster than required.
Peer review: yes
DOI: 10.1016/j.micpro.2021.104051
ISSN: 0141-9331
Appears in Collections:IEETA - Artigos
IT - Artigos

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