Optimum selection diversity for BPSK signals in Rayleigh fading channels

Author

Kim, Young Gil ; Kim, Sang Wu

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

1

fYear

2000

fDate

36770

Firstpage

50

Abstract

We propose a new selection diversity scheme that selects the branch providing the largest magnitude of the log-likelihood ratio (LLR). The LLR for BPSK signals in fading channels is found to be proportional to the product of the fading amplitude and the matched filter output. The proposed selection diversity scheme is shown to minimize the bit error rate (BER), and outperform existing selection diversity schemes. It is shown that the proposed scheme provides the same BER provided by the maximal ratio combining (MRC) scheme for a dual diversity system, and is only 0.3 dB inferior to the MRC when the number of branches is four, in Rayleigh fading channels

Keywords

Rayleigh channels; diversity reception; error statistics; filtering theory; matched filters; optimisation; phase shift keying; BER minimization; BPSK signals; MRC; Rayleigh fading channels; bit error rate; dual diversity system; fading amplitude; log-likelihood ratio amplitude; matched filter output; maximal ratio combining; optimum selection diversity; AWGN; Binary phase shift keying; Bit error rate; Diversity methods; Diversity reception; Fading; Frequency diversity; Gas insulated transmission lines; Matched filters; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on

Conference_Location

Parsippany, NJ

Print_ISBN

0-7803-6560-7

Type

conf

DOI

10.1109/ISSSTA.2000.878079

Filename

878079