TRANSMISSION METHOD BASED ON NON-CODEBOOK PRE-CODING IN MIMO SYSTEM

摘要

The present invention provides a transmission method based on a non-codebook pre-coding in a MIMO system, including: acquiring the channel information of the prior moment by a sending terminal by means of feedback or the reciprocity of channels specific to the TDD system, and acquiring a unitary matrix Q and a lower triangular matrix L having the diagonal elements thereof arranged in descending order of probability by carrying out an SLQD decomposition operation on the channel information, then completing the pre-coding for sending a signal and the pilot using the unitary matrix Q; carrying out, by a receiving terminal, a channel estimation on the pilot signal for which pre-coding has been completed, so as to acquire the lower triangular matrix L having the diagonal elements thereof arranged in descending order of probability resulting from SLQD decomposition by the sending terminal; then processing the signal received using SIC technology, so as to eliminate the interference to a sub-channel signal in a layer from the previous layers of sub-channels, thereby completing the data stream detection for each sub-channel in a layer by layer fashion. The technical solution of the present invention improves the detection performance for MIMO sub-channels at the receiving termianl effectively, and at the same time reduces the operational complexity of processing at the receiving terminal.