DocumentCode :
46442
Title :
Noncoherent Amplify-and-Forward Cooperative Networks: Robust Detection and Performance Analysis
Author :
Peng Liu ; Gazor, S. ; Il-Min Kim ; Dong In Kim
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´s Univ., Kingston, ON, Canada
Volume :
61
Issue :
9
fYear :
2013
fDate :
Sep-13
Firstpage :
3644
Lastpage :
3659
Abstract :
We develop closed-form generalized likelihood ratio test (GLRT) sequence detectors for multi-relay amplify-and-forward (AF) cooperative networks employing M-ary differential phase-shift keying (M-DPSK) and noncoherent M-ary frequency-shift keying (M-FSK). The proposed detectors achieve robust performance in a wide range of fading environments where prior knowledge of channels, signal powers, noise variances, and relay functionalities is unavailable to the destination. A comprehensive error probability performance analysis is carried out in Rayleigh fading. Specifically, we derive unified pairwise error probability (PEP) expressions for both detectors in a dual-hop network, which are valid for arbitrary modulation order M and arbitrary sequence length Ns. We also derive unified bit-error probability (BEP) expressions for both detectors employing binary signalings in various networks for Ns = 1. It is further shown that both detectors achieve near full diversity orders. Finally, the superiorities of the proposed detectors over the state-of-the-art noncoherent detectors are justified through extensive comparisons in practical scenarios. For example, in a multi-relay network where the relays are uniformly distributed between the source and destination, the proposed detector for noncoherent FSK with Ns = 1 outperforms the well-known maximum energy selector by almost 15 dB in high signal-to-noise ratios.
Keywords :
Rayleigh channels; amplify and forward communication; cooperative communication; differential phase shift keying; frequency shift keying; probability; relay networks (telecommunication); signal detection; AF; BEP expression; GLRT; M-DPSK; M-FSK; M-ary differential phase-shift keying; PEP expression; Rayleigh fading channel; arbitrary modulation order sequence; binary signaling; closed-form generalized likelihood ratio test sequence detectors; comprehensive error probability performance analysis; dual-hop network; maximum energy selector; multirelay amplify-and-forward cooperative network; noise variance; noncoherent M-ary frequency-shift keying; noncoherent amplify-and-forward cooperative network; signal-to-noise ratio; unified bit-error probability expression; unified pairwise error probability expression; Cooperative systems; Detectors; Fading; Noise; Receivers; Relays; Vectors; Cooperative networks; differential phase-shift keying (DPSK); frequency-shift keying (FSK); generalized likelihood ratio test (GLRT); noncoherent; sequence detector;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2013.071013.120781
Filename :
6560490
Link To Document :
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