Transceiver design for dual-hop nonregenerative MIMO-OFDM relay systems under channel uncertainties

Chengwen Xing*, Shaodan Ma, Yik Chung Wu, Tung Sang Ng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

In this paper, linear transceiver design for dual-hop nonregenerative [amplify-and-forward (AF)] MIMO-OFDM systems under channel estimation errors is investigated. Second order moments of channel estimation errors in the two hops are first deduced. Then based on the Bayesian framework, joint design of linear forwarding matrix at the relay and equalizer at the destination under channel estimation errors is proposed to minimize the total mean-square-error (MSE) of the output signal at the destination. The optimal designs for both correlated and uncorrelated channel estimation errors are considered. The relationship with existing algorithms is also disclosed. Moreover, this design is extended to the joint design involving source precoder design. Simulation results show that the proposed design outperforms the design based on estimated channel state information only.

Original languageEnglish
Article number5559510
Pages (from-to)6325-6339
Number of pages15
JournalIEEE Transactions on Signal Processing
Volume58
Issue number12
DOIs
Publication statusPublished - Dec 2010

Keywords

  • Amplify-and-forward (AF)
  • equalizer
  • forwarding matrix
  • minimum mean-square-error (MMSE)

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