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Content Provider | IEEE Xplore Digital Library |
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Author | Jun Hu Duman, T.M. |
Copyright Year | 2002 |
Abstract | We study information-rate calculations and coded cooperation strategies for relay channels with frequency-selective (FS) fading. We develop suitable channel trellises for the multiaccess and broadcast parts of the relay channel, and employ simulation-based techniques to calculate (approximate) ergodic information-rate bounds with FS Rayleigh fading. Our results show that frequency selectivity provides higher information rates than flat fading when the fading coefficients are known at the receiver, however, the improvement becomes marginal with increasing number of channel taps (when the overall signal to noise ratio is kept constant). Furthermore, we develop a distributed turbo-coding strategy and several decode-and-forward type detection/decoding schemes to ensure successful cooperative communication where the source and the relay may transmit simultaneously. We show that with suitable coding and iterative decoding, one can approach the approximate information-rate limits closely, and that detection schemes based on MMSE criterion provide a good performance/complexity trade-off. |
File Size | 639148 |
File Format | |
ISSN | 15361276 |
Volume Number | 7 |
Issue Number | 12 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2008-12-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Fading Rayleigh channels Frequency division multiaccess Turbo codes Iterative decoding Protocols Information rates System performance Digital relays Parity check codes codes. Achievable information rates, cooperative communication, frequency-selective fading, relay channels, turbo |
Content Type | Text |
Resource Type | Article |
Subject | Applied Mathematics Electrical and Electronic Engineering Computer Science Applications |
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