Multiuser signal detection using sequential decoding

Author

Xie, Zhenhua ; Rushforth, Craig K. ; Short, Robert T.

Author_Institution

Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA

Volume

38

Issue

5

fYear

1990

fDate

5/1/1990 12:00:00 AM

Firstpage

578

Lastpage

583

Abstract

The application of sequential decoding to the detection of data transmitted over the additive white Gaussian noise channel by K asynchronous transmitters using direct-sequence spread-spectrum multiple access (DS/SSMA) is considered. A modification of R.M. Fano´s (1963) sequential-decoding metric, allowing the messages from a given user to be safely decoded if its E_b/N₀ exceeds -1.6 dB, is presented. Computer simulation is used to evaluate the performance of a sequential decoder that uses this metric in conjunction with the stack algorithm. In many circumstances, the sequential decoder achieves results comparable to those obtained using the much more complicated optimal receiver

Keywords

decoding; multi-access systems; random noise; signal detection; spread spectrum communication; K asynchronous transmitters; additive white Gaussian noise channel; direct-sequence spread-spectrum multiple access; multiuser signal detection; optimal receiver; sequential decoding; Additive noise; Additive white noise; Convolutional codes; Detectors; Maximum likelihood decoding; Maximum likelihood detection; Signal detection; Spread spectrum communication; Transmitters; Viterbi algorithm;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.54970

Filename

54970