Optimum single-user detection for DS/CDMA systems achieving complete MAI cancellation

Author

Patel, Naresh R. ; O´Farrell, Timothy

Author_Institution

Sch. of Electron. & Electr. Eng., Leeds Univ., UK

Volume

3

fYear

1998

fDate

2-4 Sep 1998

Firstpage

941

Abstract

Conventional matched-filter detection (MFD) in a DS/CDMA system is sub-optimal when the channel noise is dominated by multiple access interference (MAI). MAI is a limiting factor to the bit error rate performance. Multi-user detector schemes have been proposed to combat MAI but these schemes have a high degree of complexity. The optimum single-user detector (OSD) considerably reduces the complexity while maintaining an improvement in the BER performance over the MFD. The first realisation of this detector (OSD-1) was proposed by O´Farrel (1989). A new interpretation of this detector architecture (OSD-2) is presented which can completely cancel MAI. A comparison of the OSD-2 with OSD-1 and the MFD is presented

Keywords

AWGN; code division multiple access; error statistics; filtering theory; interference suppression; matched filters; optimisation; radiofrequency interference; signal detection; spread spectrum communication; AWGN; BER performance; DS/CDMA systems; MAI cancellation; bit error rate performance; channel noise; complexity reduction; detector architecture; matched-filter detection; multiple access interference; optimum single-user detection; AWGN; Additive white noise; Autocorrelation; Baseband; Bit error rate; Detectors; Gaussian noise; Multiaccess communication; Multiple access interference; Noise cancellation;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on

Conference_Location

Sun City

Print_ISBN

0-7803-4281-X

Type

conf

DOI

10.1109/ISSSTA.1998.722517

Filename

722517