ASIP-Based Flexible MMSE-IC Linear Equalizer for MIMO Turbo-Equalization Applications

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Executive Summary

A novel 16-bit flexible Application-Specific Instruction set Processor for an MMSE-IC Linear Equalizer, used in iterative turbo receiver, is presented in this paper. The proposed ASIP has SIMD architecture with a specialized instruction-set and 7-stage pipeline control. It supports diverse requirements of MIMO-OFDM wireless standards such as use of QPSK, 16-QAM and 64-QAM modulation in 2?2 and 4?4 spatially multiplexed MIMO-OFDM environment. For these various operational modes, analysis of MMSE-IC LE equations and corresponding complex data representations was conducted.

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