Open Access

Subband Adaptive Array for DS-CDMA Mobile Radio

  • Xuan Nam Tran1Email author,
  • Takanori Omata1, 2,
  • Tetsuki Taniguchi1 and
  • Yoshio Karasawa1
EURASIP Journal on Advances in Signal Processing20042004:836108

Received: 15 April 2003

Published: 21 March 2004


We propose a novel scheme of subband adaptive array (SBAA) for direct-sequence code division multiple access (DS-CDMA). The scheme exploits the spreading code and pilot signal as the reference signal to estimate the propagation channel. Moreover, instead of combining the array outputs at each output tap using a synthesis filter and then despreading them, we despread directly the array outputs at each output tap by the desired user's code to save the synthesis filter. Although its configuration is far different from that of 2D RAKEs, the proposed scheme exhibits relatively equivalent performance of 2D RAKEs while having less computation load due to utilising adaptive signal processing in subbands. Simulation programs are carried out to explore the performance of the scheme and compare its performance with that of the standard 2D RAKE.

Keywords and phrases

subband adaptive arrayCDMARAKEmultipath fading

Authors’ Affiliations

Department of Electronic Engineering, The University of Electro-Communications
Core Network Planning Department and Switching Network Planning Department, Vodafone K.K


© Tran et al. 2004

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.