Low complexity optimal soft MIMO receiver

Details Low complexity optimal soft MIMO receiver Low complexity optimal soft MIMO receiver

2008-03-12

2011-11-15

Chaudry, M. Mujtaba K (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C375S341000, C375S347000

Reexamination Certificate

active

08060811

ABSTRACT:
A low-complexity optimal soft MIMO detector is provided for a general spatial multiplexing (SM) systems with two transmit and NRreceive 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).

REFERENCES:
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patent: 2008/0181342 (2008-07-01), Cho et al.
Siti M; Fitz M, “Layered Orthogonal Lattice Detector for Two Transmit Antenna Communications”, Sep. 28, 2005. * the whole document *.
Alessandro Tomason et al: “Turbo-Lord: A MAP-Approaching Soft-Input Soft-Output Detector for Iterative MIMO Receivers”, Nov. 1, 2007 *p. 3504, col. 2, paragraph 2*.
European Search Report, dated Aug. 9, 2010; relating to the corresponding European Application No. 09003541.1-2415/2101454.

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