Process for performing a QR decomposition of a channel matrix in a MIMO wireless communication system, and receiver for doing the same

摘要

A process for performing a QR Decomposition of a channel matrix of a wireless communication channel system, said process involving the steps of: performing a full QR Decomposition of one channel matrix for the purpose of deriving a first QR representation of the channel; performing a second iterative QR Decomposition of an adjacent channel matrix, said second iterative QR Decomposition using the results of said first QR representation as well as the difference of the two adjacent channel matrices ΔH. More particularly, the process is characterized in that the iterative QR Decomposition is performed in response to the detection of a high level of workload of the processor.

主权项

1. A process implemented in a wireless receiver for performing a QR Decomposition, QRD, of a channel matrix obtained by the wireless receiver in a wireless communication channel system, said process comprising:
performing a full first QR Decomposition, QRD, of one channel matrix for deriving a first QR representation of the channel; and performing, by the wireless receiver, a second iterative QR Decomposition, QRD, of an adjacent channel matrix in a domain selected from the group consisting of the time domain and the frequency domain, said second iterative QR Decomposition, QRD, is obtained, using the results of said first QR representation as well as the difference between the two adjacent channel matrices ΔH=Hi′,j′−Hi,j of two consecutive channels Hi,j and Hi′,j′, corresponding to consecutive Resource Elements (REs) at position (i,j) and (i′,j′) respectively.