Antenna array using a channel estimation technique in a DS/CDMA system with M-ary orthogonal modulation

Jeongho Park, Sukhyon Yoon, Changeon Kang, Daesik Hong

Research output: Contribution to journalConference article

Abstract

Adaptive antenna array techniques are known as good one to cancel multipath and multiuser interference. However, some of them need training signals to estimate the desired signal or have heavy complexity to compute the algorithmic processing. In this paper, we propose an antenna array receiver in a direct sequence/code division multiple access (DS/CDMA) system with M-ary orthogonal modulation. At every antenna a channel estimation technique is used, which refers to the maximum correlator output of a RAKE receiver. The estimated channel coefficients enable coherent detection with no need of training signals. Moreover, the antenna weights, which are determined by the estimated channel coefficients, make it possible to focus the receiver on the desired signal and to suppress the interference signal. Consequently, the proposed receiver has 2D (dimensions) RAKE structure which can exploit both spatial diversity and temporal diversity. Simulation results show that the performance of the proposed scheme improves 1.5 dB in Eb/No at a BER = 10-3 over the receiver of noncoherent detection. The results also show that at a BER = 10-2 the proposed receiver improves about 2.3 times and 3 times system capacity with 3 and 5 antennas, respectively.

Original languageEnglish
Pages (from-to)759-763
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume2
Issue number52 ND
Publication statusPublished - 2000 Dec 1
Event52nd Vehicular Technology Conference (IEEE VTS Fall VTC2000) - Boston, MA, USA
Duration: 2000 Sep 242000 Sep 28

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All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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