Joint Space-Time Interference Cancellation and Channel Shortening


Roopsha Samanta , Robert W. Heath Jr. and Brian L. Evans


Proc. of IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 9-12, 2003.


In this paper, we present a framework for the design of space-time equalizers that perform joint interference cancellation and channel shortening in multi-user multiple-input multiple-output frequency-selective channels. The space-time filter coefficients and the shortened channel vectors are jointly optimized to minimize the interference-plus-noise using training data. The receiver design is completed by using an appropriate Viterbi equalizer in the second stage for inter-symbol interference equalization. The design is adapted to two different detection schemes - independent detection and ordered successive interference cancellation. Simulation results show acceptable symbol error performance with both detection schemes.

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