Detecção de Busca Local em Redes de Múltiplo Acesso DS/CDMA (Local Search Detection in Multiple Access DS/CDMA Networks)

Alvaro Ricieri Castro e Souza (alvarorcsouza@gmail.com), Alex Miyamoto Mussi (alexmmussi@gmail.com), Rafael de Oliveira Ribeiro (rafael.rib87@gmail.com), Taufik Abrão (taufik.abrao@gmail.com)


Universidade Estadual de Londrina
This paper appears in: Revista IEEE América Latina

Publication Date: March 2012
Volume: 10,   Issue: 2 
ISSN: 1548-0992


Abstract:
This paper demonstrates the effectiveness of local search algorithm (LS) for multiuser detection (MuD) in multiple access DS/CDMA communication networks, using digital sinal processing platform. Even been the simplest search algorithm found in literature, the 1-LS algorithm applied to MuD problem is capable to achieve good performance-complexity tradeoff, indicating a certain efficiency in approaching the optimal solution (NP complete problem) under severe operation system and channel conditions, i.e., flat Rayleigh channel, medium and high system loading and a wide range for signal-noise ratio.

Index Terms:
DS/CDMA, multiuser detection, search algorithm, optimization, computational complexity.   


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