Title :
Closed-Form Performance of MFSK Signals with Diversity Reception Over Non-Identical Fading Channels
Author :
Le Cao ; Tao, Meixia ; Kam, Pooi Yuen
Author_Institution :
Dept. of Electr. & Comput. Eng., National Univ. of Singapore
Abstract :
This paper provides a comprehensive study on the error performance of noncoherent orthogonal M-ary frequency-shift-keying (FSK) signals with various diversity combining schemes over fading channels. The diversity branches are assumed to be independent and non-identically distributed (i.n.d) Rayleigh fading. Closed-form expressions for the symbol error probability with an arbitrary diversity order and any modulation level are obtained for optimal combining (OC), equal gain combining (EGC) and log-likelihood ratio based selection combining (SC-LLR). Our analytical results show that EGC performs closely to OC over slightly unbalanced channels, whereas for highly unbalanced channels SC-LLR performs more closely to OC than EGC.
Keywords :
Rayleigh channels; diversity reception; frequency shift keying; maximum likelihood detection; probability; MFSK signals; Rayleigh fading; arbitrary diversity order; diversity branches; diversity combining schemes; diversity reception; equal gain combining; log-likelihood ratio; modulation level; noncoherent orthogonal M-ary frequency-shift-keying signals; nonidentical fading channels; optimal combining; selection combining; symbol error probability; Closed-form solution; Diversity methods; Diversity reception; Error probability; Fading; Frequency diversity; Frequency shift keying; Performance analysis; Performance gain; Rayleigh channels;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.142
