Patent Document ID: 8811145
Application ID: 13544640
Patent Flag: 1

Claim One:
1. A detection method in a multiple-input multiple-output single-carrier block transmission system, comprising: performing fast Fourier transform on a received signal, and after transforming the received signal to a frequency domain, performing subcarrier demapping; performing sorted QR decomposition (Sorted QR Decomposition, SQRD) decomposition that is based on a minimum mean squared error (Minimum Mean Squared Error, MMSE) criterion on an equivalent channel matrix of the frequency domain, obtaining a preprocessing matrix and a block upper triangular matrix, and performing preprocessing on a frequency domain received signal by using the preprocessing matrix; reconstructing a priori information of a fed back sent symbol by using a mean and a variance, and performing, layer by layer, soft interference cancellation equalization which is based on a minimum mean squared error on a sent symbol block which is on each stream; performing inverse fast Fourier transform on a frequency domain equalized symbol to a time domain, reconstructing an a posteriori mean of the sent symbol and an a posteriori variance of the sent symbol, transforming them to the frequency domain, and using them as a priori information to continue performing soft interference cancellation equalization on another stream or subsequent iteration; after finishing iterative interference cancellation equalization, calculating a log-likelihood ratio of a bit of the sent symbol; and sending the log-likelihood ratio of the bit of the sent symbol to a channel decoder for channel decoding.