Apparatus and method for signal detection using log likelihood ratio
AssigneesElectronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
InventorsYoung Ha Lee, Seungjae Bahng, Kyung Yeol Sohn, Youn Ok Park
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Abstract
A method for signal detection using a log likelihood ratio in a multi-input multi-output communication system includes reconfiguring the signals received through the reception antennas on the basis of channel characteristics and acquiring candidate groups for each transmission symbol by acquiring a signal constellation of one quadrant with respect to signals generatable for each transmission symbol and signal constellations for the remaining quadrants on the basis of the reconfigured signals.
Claims13
A method for signal detection in a multi-input multi-output communication system receiving signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, comprising:
- reconfiguring the signals received through the plurality of the reception antennas on the basis of channel characteristics;
- acquiring candidate groups for each transmission symbol by acquiring a signal constellation of one quadrant with respect to signals that can be generated for each transmission symbol and signal constellations for a plurality of remaining quadrants on the basis of the reconfigured signals;
- calculating metrics for the acquired candidate groups for each transmission symbol;
- and
- generating a log likelihood ratio (LLR) for signals constituting the acquired candidate groups for each transmission symbol on the basis of the calculated metrics of the acquired candidate groups for each transmission symbol.
A method for signal detection in a multi-input multi-output communication system receiving signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, comprising:
- reconfiguring the signals received through the plurality of the reception antennas on the basis of channel characteristics;
- acquiring a signal constellation of one quadrant with respect to signals that can be generated for each transmission symbol on the basis of the reconfigured signals;
- acquiring signal constellations of a plurality of remaining quadrants by individually rotating the signal constellation of the one quadrant by a set angle several times;
- and
- acquiring candidate groups for each transmission symbol on the basis of the acquired signal constellations of the one quadrant and the plurality of the remaining quadrants.
An apparatus for signal detection in a multi-input multi-output communication system receiving signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, comprising:
- an input processor reconfiguring the signals received through the plurality of the reception antennas on the basis of channel characteristics;
- a signal detector acquiring candidate groups for each transmission symbol by acquiring a signal constellation of one quadrant with respect to signals that can be generated for each transmission symbol and signal constellations for a plurality of remaining quadrants on the basis of the reconfigured signals;
- a metric calculator calculating metrics for the acquired candidate groups for each transmission symbol;
- and
- an LLR generator generating a log likelihood ratio (LLR) for signals constituting at least one of the acquired candidate groups for each transmission symbol on the basis of the calculated metrics of the acquired candidate groups for each transmission symbol.
Dependencies are inferred from the claim text.