Method and apparatus for detecting transmission symbol using...

Details Method and apparatus for detecting transmission symbol using... Method and apparatus for detecting transmission symbol using...

2008-04-04

2011-12-13

Payne, David C. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S316000

Reexamination Certificate

active

08077783

ABSTRACT:
Provided are a method and apparatus for detecting a transmission symbol using a lattice-reduction matrix in a Multiple Input Multiple Output (MIMO) system. The transmission symbol detection method includes: restoring an original transmission symbol from a reception signal received through the plurality of antennas; and obtaining at least one noise component included in the reception signal from a constellation changed due to applying the lattice-reduction matrix, exchanging a position of the at least one noise component under a predetermined condition which depends on a state of the restored transmission symbol, and processing the at least one noise component whose position is changed, together with the restored transmission symbol, thereby providing a soft output. Therefore, it is possible to obtain a performance gain in channel decoding.

REFERENCES:
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patent: 2004/0083082 (2004-04-01), Onggosanusi et al.
patent: 2006/0146945 (2006-07-01), Chow et al.
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patent: 2003-0047178 (2003-06-01), None
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patent: 1020070061734 (2007-06-01), None
patent: WO 03/047118 (2003-06-01), None

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