NDLI: Analysis of Differential Orthogonal Space–Time Block Codes Over Semi-Identical MIMO Fading Channels

Content Provider	IEEE Xplore Digital Library
Author	Meixia Tao Pooi Yuen Kam
Copyright Year	1972
Abstract	We study the performance of differential orthogonal space-time block codes (OSTBC) over independent and semi-identically distributed block Rayleigh fading channels. In this semiidentical fading model, the channel gains from different transmit antennas to a common receive antenna are identically distributed, but the gains associated with different receive antennas are nonidentically distributed. Arbitrary fluctuation rates of the fading processes from one transmission block to another are considered. We first derive the optimal symbol-by-symbol differential detector, and show that the conventional differential detector is suboptimal. We then derive expressions of exact bit-error probabilities (BEPs) for both the optimal and suboptimal detectors. The results are applicable for any number of receive antennas, and any number of transmit antennas for which OSTBCs exist. For two transmit antennas, explicit and closed-form BEP expressions are obtained. For an arbitrary number of transmit antennas, a Chernoff bound on the BEP for the optimal detector is also derived. Our results show that the semi-identical channel statistics degrade the error performance of differential OSTBC, compared with the identical case. Also, the proposed optimal detector substantially outperforms the conventional detector when the channel fluctuates rapidly. But in near-static fading channels, the two detectors have similar performances
Starting Page	282
Ending Page	291
Page Count	10
File Size	606714
File Format	PDF
ISSN	00906778
Volume Number	55
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Block codes MIMO Fading Detectors Receiving antennas Transmitting antennas Rayleigh channels Fluctuations Error analysis Degradation transmit diversity Differential detector independent and nonidentical channels Rayleigh fading space–time block codes (STBC)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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