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Blind Identification of MIMO Channels in Block Transmission System with Periodic Modulation and Cyclic Prefix |
Chen Cai-yun Deng An-an Xie Sheng-li |
School of Electronic & Information Engineering, SCUT, Guangzhou 510640, China |
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Abstract Block prefix is usually added in block transmission system for facilitating channel identification. With cyclic prefix, the channel matrix exhibits block circulant property which is exploited to blindly identify periodically modulated block transmission system in an existing method. In this paper, this method is extended to multi-user system and some identifiability conditions are given. Though also as a second order statistics based scheme, not like many subspace based methods, this new approach owns the advantage of not sensitive to noises, channel order mismatching or channel zero locations. Simulation examples demonstrate its good performance under low SNR.
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Received: 31 July 2007
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Corresponding Authors:
Chen Cai-yun
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