Space-time MIMO receiver with constrained optimization

We propose a space-time receiver framework that allows joint optimization of the prefilter and the subsequent equalization structures, for a frequency-selective multiple transmit antenna, multiple receive antenna MIMO system. In this framework, we represent a desired equalization structure as a structural constraint on the feedback filter matrix and incorporate it in the MMSE optimization of the prefilter/feedback filter pair. We illustrate the versatility of this framework with several space-time receiver structures that provide different tradeoffs between complexity and performance, including the decoupled Viterbi algorithm (DVA), the ordered successive Viterbi algorithm (OSVA) and the group ordered successive Viterbi algorithm (GOSVA). The proposed algorithms are also verified in a practical EDGE simulation chain.