Acta Metallurgica Sinica(English letters)

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Statistically robust design of linear filter for non-regenerative MIMO relay systems


  1. 1. Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2010-09-26 Revised:2011-02-21 Online:2011-06-30 Published:2011-06-13
  • Contact: Ying Wang
  • Supported by:

    ;863 project; National Natural Science Foundation of China;Program for New Century Excellent Talents in University


This paper addresses the robust linear filter design issues for non-regenerative multiple input multiple output (MIMO) relay systems with imperfect channel state information (CSI) in both or partial hops. By considering statistical Kronecker channel model involving channel mean and antenna correlation, the robust linear processing schemes in imperfect CSI scenario for both hops are first derived based on mean squared error (MSE) criterion. In addition to this, the result is also extended to two practical scenarios, i.e. imperfect CSI for relay link with perfect CSI for access link and imperfect CSI for access link with perfect CSI for relay link. Simulation results show that the proposed scheme is capable of mitigating the performance degradation caused by the imperfect CSI.

Key words:

MIMO, relay, linear filter, robust design

CLC Number: