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    題名: Adaptive Semi-blind Channel Estimation for ST-BC MIMO-CDMA Systems with Hybrid User Signature
    作者: CHERN, Shiunn-Jang;Huang, Wang-Chih;Yang, Richard Hsin-Hsyong
    貢獻者: 淡江大學電機工程學系
    關鍵詞: Capon receiver;space-time block code;MIMO;hybrid user signature;zero-padding;GSC-RLS algorthm
    日期: 2013-11-12
    上傳時間: 2013-11-18 22:27:31 (UTC+8)
    出版者: IEEE Circuits and Systems Society
    摘要: we extend our previous work to present a new semi-blind transceiver for the direct-sequence code division multiple access (DS-CDMA) system that uses multiple transmit and receive antennas (MIMO) system, equipped with space-time block code (ST-BC). In the transmitter we design a new hybrid augmented user signature (AUS) that composes of the desired user signatures and the prefix/postfix zero-padding sequences with respect to individual transmit-antennas. The hybrid AUS is devised to resolve the phase ambiguity problem which occurs in all blind receivers. At the receiver we propose a Capon-like semiblind two-branch filter bank receiver, based on the linearly constrained constant modulus (LCCM) criterion, followed by the AUS-assisted semi-blind channel estimation and power method for block symbol recovery. This enables us to partially alleviate the effects of inter-block interference (IBI) and the multiple access interference (MAI). In the ST-BC MIMO-CDMA receiver with two-branch filterbank, we build on the generalized sidelobe canceller (GSC) structure with the RLS for implementing the adaptive semi-blind LCCM receiver. Via intense simulations it reveals that our proposed new transceiver has robust performance against the user’s acquisition inaccuracies comparing with current vailable algorithms and to resolve the phase ambiguity problem.
    關聯: Proceeding of 2013 International Symposium onIntelligent Signal Processing and Communication Systems (ISPACS 2013), pp.369-374
    顯示於類別:[電機工程學系暨研究所] 會議論文

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