Design and Analysis of Low-Complexity Multi-Antenna Relaying for OFDM-Based Relay Networks

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A class of low-complexity multi-antenna relaying schemes is proposed for orthogonal frequency division multiplexing based one-way and two-way relay networks. In the proposed schemes, two single-antenna terminal nodes complete the data transfer in two time phases via a multi-antenna amplify-andforward relay without channel state information, discrete Fourier transform (DFT), and inverse DFT. The relay signal processing consists of receive combining, power scaling, and transmit diversity, where instantaneous time domain power scaling is proposed for power scaling and power-based selection combining and cyclic delay combining are proposed for receive combining, to leverage the performance only with time domain operations. An approximation to the outage probability is also derived to predict the coded performance behavior under practical channel models. It is shown by evaluating the outage probability and coded bit error rate that the proposed schemes outperform the conventional schemes of comparable complexity.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-07
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON COMMUNICATIONS, v.62, no.7, pp.2236 - 2248

ISSN
0090-6778
DOI
10.1109/TCOMM.2014.2318047
URI
http://hdl.handle.net/10203/189856
Appears in Collection
EE-Journal Papers(저널논문)
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