Apparatus and method for detecting a signal in a...

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

Reexamination Certificate

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C375S262000, C375S316000, C375S340000

Reexamination Certificate

active

08005170

ABSTRACT:
A method and apparatus for detecting a signal in a communication system using at least two transmit antennas are provided. The signal detection method and apparatus includes selecting a symbol corresponding to a lowest branch metric from among symbols, the number of which corresponds to a modulation scheme, determining a candidate symbol by extending a process of selecting a symbol corresponding to a lowest branch metric from among the selected symbols, to a number which is less by one than the number of the transmit antennas, setting an accumulated branch metric of the candidate symbol as a threshold, removing a symbol having an accumulated branch metric higher than the threshold, and selecting, as a last received symbol, a symbol corresponding to a path having the lowest accumulated branch metric among paths selected without being removed until a last stage.

REFERENCES:
patent: 2006/0104390 (2006-05-01), Graef et al.
patent: 2009/0213965 (2009-08-01), Maeda et al.
patent: 2006-270430 (2006-10-01), None
patent: 1997-0705248 (1997-09-01), None
patent: 96/02983 (1996-02-01), None
Hiroyuki Kawai et al “Adaptive Control of Surviving Symbol Replica Candidates in QRM-MLD for OFDM MIMO Multiplexing” IEEE Jun. 2006.

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