Chapter 1: Invited Addresses and Tutorials on Signals, Coding,
  Systems and Intelligent Techniques

Title: Efficient Parallel Form of Multiuser Detection in CDMA Receivers

Author(s): Daniel Tapia, Hector Perez, Mariko Nakano

Address: Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Ingenieria Mecanica y Electrica, Unidad Profesional Culhuacan Instituto Politecnico Nacional, Mexico City | Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Ingenieria Mecanica y Electrica, Unidad Profesional Culhuacan Instituto Politecnico Nacional, Mexico City | Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Ingenieria Mecanica y Electrica, Unidad Profesional Culhuacan Instituto Politecnico Nacional, Mexico City

Reference: 12th International Workshop on Systems, Signals and Image Processing pp. 411 - 415

Abstract/Summary: In this paper, we present an alternative approach with reduced complexity for blind adaptive multiuser detection based on subband decomposition. Subband decomposition leads to considerable reduction of computational cost, which is a fundamental requirement in practical systems. Gradient algorithms can be then applied to iteratively calculate the weights in every subband. However, to difference from conventional blind adaptive algorithms, the adaptation process is performed over filters with shorter lengths, which leads to reduce the complexity overall system. Simulations indicate that the performance of the proposed method is acceptable while conserve a reasonable computational cost.

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