Fractional symbol differential detection for DS-CDMA over Rayleigh fading channels

Author

Chang, Hong ; Howlader, Mostofa K.

Author_Institution

Dept. of Electr. & Comput. Eng., Tennessee Univ., Knoxville, TN, USA

Volume

1

fYear

2004

Firstpage

543

Abstract

In this paper, a generic differential detection technique for DS-CDMA systems. Generalized fractional symbol differential detection (GFSD), is proposed and studied in Rayleigh fading channels. The symbol-level differential detection (SLD) and chip-level differential detection (CLD) are also discussed as special cases of GFSD. The decision variable of GFSD is derived as a function of processing gain and fractional factor. The average bit error rate (BER) performance is investigated in multipath time-varying channels via simulations with different parameters, such as signal to noise ratio (SNR), fading rate and number of paths. The results show that for any specific channel situation, there is an optimal fractional factor to obtain the best system performance.

Keywords

Rayleigh channels; code division multiple access; differential detection; error statistics; multipath channels; radio receivers; radio transmitters; spread spectrum communication; time-varying channels; DS-CDMA; Rayleigh fading channels; bit error rate; chip-level differential detection; direct sequence code division multiple access; fading rate; fractional factor; fractional symbol differential detection; multipath time-varying channels; processing gain; signal to noise ratio; symbol-level differential detection; AWGN channels; Bit error rate; Cross layer design; Encoding; Fading; Multiaccess communication; Phase detection; Phase noise; Signal to noise ratio; Superluminescent diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE

ISSN

1525-3511

Print_ISBN

0-7803-8344-3

Type

conf

DOI

10.1109/WCNC.2004.1311603

Filename

1311603