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A blind CM receiver for STBC over channels with inter-symbol interference

Bendoukha, S. and Weiss, S. (2007) A blind CM receiver for STBC over channels with inter-symbol interference. In: 7th IEEE International Symposium on Signal Processing and Information Technology, 2007-12-15 - 2007-12-18.

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Alamouti's Space-Time Block Coding (STBC) scheme has received considerable attention due to its ability to maximize the diversity gain of a Multi-Input-Multi-Output (MIMO) transmission link. For frequency selective fading, only a few receivers can be found in the literature. These are mainly trained and block based, such as Time Reversal STBC (TRSTBC), introduced by [3], [4]. In order to ultimately achieve better tracking behavior, this paper focuses on the development or a non-block-based method. The Constant Modulus (CM) criterion is utilized on the received signals with the orthogonality constraint of the transmitted STBC signals. A novel criterion is derived to enforce the STBC structure on the equalizer outputs and consequently minimize the cross-correlation. Simulation results are presented to demonstrate the performance of the proposed algorithm.