Patent ID: 8107546
Filing Date: 2012-01-31
Classification: H04L

Abstract:
1. A detection method of space domain maximum a posteriori probability (MAP) in a wireless communication system comprising a detector configured to perform an internal iteration, which is characterized in that it performs iterative soft interference cancellation detection for interference signals in other moments, but performs maximum a posteriori probability (MAP) detection or simplified MAP detection for all signals in a current time in space domain, through the following steps: 1.1) performing matched combination of received signals in time domain and space domain on individual fading block basis to compute a signal vector, and calculating an equivalent channel matrix; 1.2) perfoiming sequential detection, carrying out interference cancellation for the interference signals at other moments with reference to an estimated value of the signal vector obtained in step 1.1) to obtain received signals after interference cancellation, and calculating an equivalent noise variance matrix, and then performing the MAP or simplified MAP detection with the obtained received signals after interference cancellation, the equivalent channel matrix, and the equivalent noise variance matrix, to obtain a detection result comprising soft information of bits; and 1.3) obtaining the soft information of the bits from the detection result obtained in step 1.2), calculating an estimated value and a variance of the signals before the end of the internal iteration in the detector, and returning to step 1.2) to perform a next detection cycle; outputting a result at the end of the internal iteration in the detector, or outputting the result after a hard decision.