A multiuser receiver for trellis-coded DS/CDMA systems in asynchronous channels

Author

Kim, Kwang Soon ; Song, Iickho ; Kim, Hong Gil ; Kim, Yun Hee ; Kim, Sun Yong

Author_Institution

Radio & Broadcasting Tech. Lab., Electron. & Telecommun. Res. Inst., Daejeon, South Korea

Volume

49

Issue

3

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

844

Lastpage

855

Abstract

We propose and analyze a multiuser receiver using a decorrelating filter and Viterbi decoders for trellis-coded direct-sequence code-division multiple-access (DS/CDMA) systems with biorthogonal signal constellation in asynchronous channels. The biorthogonality is implemented by user signature waveforms and the decorrelating filter. The performance of the proposed system is investigated with emphasis on the asymptotic cases: it is shown that the proposed system provides us with some coding gain and near-far resistance. It is confirmed that we can enhance the performance of the proposed system by using base-station antenna arrays

Keywords

Viterbi decoding; antenna arrays; code division multiple access; decorrelation; encoding; filtering theory; land mobile radio; multiuser channels; radio receivers; spread spectrum communication; trellis coded modulation; TCM; Viterbi decoders; asymptotic performance; asynchronous channels; base-station antenna arrays; biorthogonal signal constellation; coding gain; decorrelating filter; direct-sequence code-division multiple-access; mobile communications; multiuser receiver; near-far resistance; performance; trellis-coded DS/CDMA systems; trellis-coded modulation; user signature waveforms; Antenna arrays; Constellation diagram; Decoding; Decorrelation; Filters; Immune system; Multiaccess communication; Performance gain; Signal analysis; Viterbi algorithm;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.845103

Filename

845103