Title :
Soft Information Relaying in Fading Channels
Author :
Karim, Md Anisul ; Yuan, Jinhong ; Chen, Zhuo ; Li, Jun
Author_Institution :
Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia
fDate :
6/1/2012 12:00:00 AM
Abstract :
This letter considers the mutual information based soft forwarding (MIF) scheme for a memoryless parallel relay network in Rayleigh fading channels. The exact analytical expression for soft noise variance in Rayleigh fading channels is first given. A tight upper bound of the soft noise variance of the relayed signal and the input-output relationship at the relay is then derived. Furthermore, it is revealed that the MIF scheme in Rayleigh fading channels can achieve a full diversity order. Simulation results show that the MIF scheme yields about 0.8 - 1.8 dB signal-to-noise ratio (SNR) gains compared to the various full diversity-achieving schemes in the literature.
Keywords :
Rayleigh channels; diversity reception; radio networks; Rayleigh fading channels; full diversity-achieving schemes; gain 0.8 dB to 1.8 dB; memoryless parallel relay network; mutual information based soft forwarding scheme; signal-to-noise ratio; soft information relaying; soft noise variance; Bit error rate; Fading; Relays; Signal to noise ratio; Upper bound; Wireless communication; Diversity order; fading channels; parallel relay network; soft information relaying; symbol-wise mutual information;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2012.033012.120080
