MMSE Based Transceiver Designs in Closed-Loop Non-Regenerative MIMO Relaying Systems
- Authors
- Song, Changick; Lee, Kyoung-Jae; Lee, Inkyu
- Issue Date
- 7월-2010
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Relay; multiple-input multiple-output (MIMO); minimum mean-squared error (MMSE); joint transceiver design; channel state information (CSI); limited feedback
- Citation
- IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.9, no.7, pp.2310 - 2319
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
- Volume
- 9
- Number
- 7
- Start Page
- 2310
- End Page
- 2319
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116110
- DOI
- 10.1109/TWC.2010.07.091234
- ISSN
- 1536-1276
- Abstract
- In this paper, we propose a new design strategy based on the minimum mean-squared error (MMSE) in closed-loop non-regenerative multiple-input multiple-output relaying systems. Instead of conventional singular value decomposition based methods, we address the problem for joint MMSE design in a different approach using the Wiener filter solution which leads to simple derivations of the optimal MMSE designs. First, allowing the channel state information (CSI) at the source, we provide a new closed form solution for a source-relay-destination joint MMSE design by extending existing relay-destination joint MMSE designs. Second, for the limited feedback scenario, we address a codebook design criteria for the multiple streams precoding design with respect to the MMSE criterion. From our design strategy, we observe that compared to conventional non-regenerative relaying systems, the source or the destination only needs to know the CSI corresponding to its own link such as the source-to-relay or the relay-to-destination in view of the MMSE. Simulation results show that the proposed design gives about 7.5dB gains at a bit error rate of 10(-4) over existing relay-destination joint MMSE schemes and we can get close to the optimal unquantized schemes with only a few feedback bits.
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