Methodology and Implementation on DSP of Heuristic Multiuser DS/CDMA Detectors.

Methodology and Implementation on DSP of Heuristic Multiuser DS/CDMA Detectors.

Authors

  • Alex Miyamoto Mussi Universidade Estadual de Londrina
  • Rafael de Oliveira Ribeiro Universidade Estadual de Londrina
  • Taufik Abrão Universidade Estadual de Londrina

DOI:

https://doi.org/10.5433/1679-0375.2010v31n2p165

Keywords:

Mobile communication, CDMA, Multiuser detection, Heuristic algorithms, Digital signal processors, Complexity

Abstract

The growing number of users of mobile communications networks and the scarcity of the electromagnetic spectrum make the use of diversity techniques and detection/decoding efficient, such as the use of multiple antennas at the transmitter and/or receiver, multiuser detection (MuD – Multiuser Detection), among others, have an increasingly prominent role in the telecommunications landscape. This paper presents a design methodology based on digital signal processors (DSP – Digital Signal Processor) with a view to the implementation of multiuser heuristics detectors in systems DS/CDMA (Direct Sequence Code Division Multiple Access). Heuristics detection techniques result in near-optimal performance in order to approach the performance of maximum-likelihood (ML). In this work, was employed the DSP development platform called the C6713 DSK, which is based in Texas TMS320C6713 processor. The heuristics techniques proposed are based on well established algorithms in the literature. The efficiency of the algorithms implemented in DSP has been evaluated numerically by computing the measure of bit error rate (BER). Finally, the feasibility of implementation in DSP could then be verified by comparing results from multiple Monte-Carlo simulation in Matlab, with those obtained from implementation on DSP. It also demonstrates the effective increase in performance and system capacity of DS/CDMA with the use of heuristic multiuser detection techniques, implemented directly in the DSP.

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Author Biographies

Alex Miyamoto Mussi, Universidade Estadual de Londrina

Alunos de mestrado do Departamento de Engenharia Elétrica.

Rafael de Oliveira Ribeiro, Universidade Estadual de Londrina

Alunos de mestrado do Departamento de Engenharia Elétrica.

Taufik Abrão, Universidade Estadual de Londrina

Taufik Abrão é graduado, Mestre e Doutor em Engenharia Elétrica em 1992, 1996 e 2001, respectivamente, pela Escola Politécnica da Universidade de São Paulo. Desde 1997 é docente do Departamento de Engenharia Elétrica da Universidade Estadual de Londrina (DEEL-UEL), PR Atualmente é professor adjunto AD-C e Coordenador do programa de mestrado do DEEL/UEL. É (co-)autor de cerca de 70 artigos técnicos publicados em periódicos e em congressos especializados. Suas áreas de interesse incluem comunicações sem fio, projeto de seqüências de códigos para uso em sistemas DS/CDMA, detecção multiusuário e estimação de parâmetros em DS/CDMA, técnicas de otimização aplicáveis a sistemas de mútiplo acesso, sistemas UWB e MC-CDMA.

Published

2010-12-15

How to Cite

Mussi, A. M., Ribeiro, R. de O., & Abrão, T. (2010). Methodology and Implementation on DSP of Heuristic Multiuser DS/CDMA Detectors. Semina: Ciências Exatas E Tecnológicas, 31(2), 165–180. https://doi.org/10.5433/1679-0375.2010v31n2p165

Issue

Section

Original Article

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