A low-complexity optimal soft mimo receiver

Details A low-complexity optimal soft mimo receiver A low-complexity optimal soft mimo receiver

H - Electricity

04

W

H04W 72/00 (2009.01) H04L 27/34 (2006.01)

Patent

CA 2625567

A low-complexity optimal soft MIMO detector is provided for a general spatial multiplexing (SM) systems with two transmit and N R receive antennas. The computational complexity of the proposed scheme is independent from the operating signal-to-noise ratio (SNR) and grows linearly with the constellation order. It provides the optimal maximum likelihood (ML) solution through the introduction of an efficient Log-likelihood ratio (LLR) calculation method, avoiding the exhaustive search over all possible nodes. The intrinsic parallelism makes it an appropriate option for implementation on DSPs, FPGAs, or ASICs. In specific, this MIMO detection architecture is very suitable to be applied in WiMax receivers based on IEEE 802.16e/m in both downlink (subscriber station) and uplink (base station).

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