Maximum Ratio Combining Precoding for Multi-Antenna Relay Systems | Zendy

Hamid Reza Bahrami | Zendy; Tho LeNgoc | Zendy

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Maximum Ratio Combining Precoding for Multi-Antenna Relay Systems

Author(s) -

Hamid Reza Bahrami,

Tho LeNgoc

Publication year - 2010

Publication title -

communications and network

Language(s) - English

Resource type - Journals

eISSN - 1949-2421

pISSN - 1947-3826

DOI - 10.4236/cn.2010.22016

Subject(s) - relay , precoding , computer science , ergodic theory , transmission (telecommunications) , node (physics) , computer network , antenna (radio) , simple (philosophy) , relay channel , topology (electrical circuits) , telecommunications , mimo , mathematics , power (physics) , mathematical analysis , channel (broadcasting) , physics , philosophy , structural engineering , epistemology , quantum mechanics , combinatorics , engineering

This paper addresses the design of practical communication strategies for multi-antenna amplify-and-forward and decode-and-forward relay systems. We show that simple linear techniques at the source and destination in conjunction with maximum ratio combining can provide an optimal transmission strategy in terms of received SNR without imposing a huge computational load over the relay node(s). Besides, the structures of precoding matrices are very similar at the source and relay nodes, which reduces the complexity as all nodes can play the role of source and relay nodes without changing their transmission structure. Numerical results show that the proposed transmission and reception techniques can improve the received SNR, and hence enhance the ergodic capacity

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