Method for detecting transmission symbols in multiple antenna system
AssigneesSamsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute
InventorsYoung Jo Bang, Chang Wahn Yu, Seung Jae Bahng, Dae Ho Kim, Youn Ok Park, Jee Hwan Ahn, Il Min Kim
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Abstract
The present invention relates to a transmission symbol detection method in a multiple antenna system. In the present invention, when a channel matrix is estimated through channel estimation, a receiving side calculates a Q matrix and an R matrix through QR decomposition that is more simplified than a typical QR decomposition from an augmented channel matrix that includes the estimated channel matrix. In addition, the receiving side detects symbols having the minimum Euclidean metric by using the two matrixes, as transmission symbols.
Claims6
A transmission symbol detection method of a multiple antenna system including a plurality of transmission antennas, the method comprising:
- estimating a first matrix comprising a channel matrix including a plurality of channel gains respectively corresponding to the plurality of transmission antennas by using a received signal;
- calculating a second matrix comprising an upper-triangle matrix and a third matrix comprising a unitary matrix from the first matrix;
- and
- detecting a plurality of transmission symbols by performing successive interference cancellation (SIC) based on the second and third matrixes,
- checking a channel condition of each of the plurality of transmission antennas;
- and
- determining a detection order of the plurality of transmission symbols based on the channel condition,
- wherein the second matrix comprises a first component and a second component as diagonal components, where the first component corresponds to a first channel gain of the first matrix and the second component is calculated based on the first channel gain and on a second channel gain that is different from the first channel gain, and the second matrix further comprises a plurality of components determined by using the first channel gain and a plurality of channel gains that are different from the first channel gain,
- wherein the plurality of transmission symbols corresponds to a first symbol group including a pair of first and second symbols and a second symbol group including a pair of third and fourth symbols,
- wherein the determining of the detection order detects the first symbol group first before the second symbol group when a channel condition of the first symbol group is determined to be better than a channel condition of the second symbol group and comprises detecting of a plurality of transmission symbols that represent a minimum Euclidean metric by using the second and third matrixes, and
- wherein the detecting of the plurality of transmission symbols comprises detecting the first symbol group that minimizes a first metric and detecting the second symbol group that minimizes a second metric.
Dependencies are inferred from the claim text.