K-Best MIMO Decoder

Features

• Fixed Depth K-Best Decoder (K=16)
• Achieves close-to ML BER performance
• Supports four synchronized streams with different QAM (from BPSK to 64 QAM)
• Supports square and non-square QAM
• Supports OFDM based systems with different Space Time Coding (STC)
• Soft input soft output
• Supports (K-best 2X2) or  (K-best 3X3) or (K-best 4X4), selectable during run time

Functional Description

The K-best decoder is part of the MIMO decoder. The MIMO Decoder accepts two independent input streams, and the channel estimation matrix as shown in Fig. 1. The inputs to the MIMO Decoder are the estimated channel matrix and the received vector of symbols. Since the transmitted symbols could be pre-coded, some processing may be needed (optional) at the beginning of the detection. The QR decomposition   is performed in preparation for the K-Best decoding. The outputs of the QR decomposition and  are fed to the K-Best decoder.

IP Deliverables

• Synthesizable Verilog
• System Model (Matlab)
• Verilog Test Benches
• Documentation

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