METHOD AND SYSTEM FOR CHANNEL INFORMATION FEEDBACK

摘要

Disclosed are a method and system for channel information feedback capable of decomposing a pre-coding matrix to be fed back into a product of a plurality of Givens rotation matrices, each rotation matrix corresponding to a rotation angle; the corresponding rotation angles of the decomposed rotation matrices being fed back. The method and the system of the present invention are a channel compression and quantization feedback solution based on Givens transform and can use continuous Givens rotations to convert a pre-coding matrix to be fed back into a finite angular value, and a base station can use these fed back and quantized angles to re-establish a channel matrix, thereby calculating a pre-coding vector to effectively reduce feedback overheads. Regarding conventional scalar quantization, the present invention is able to effectively reduce the amount of quantization elements, thereby reducing the feedback amount; and regarding vector quantization, as it is only necessary to perform a decomposition and quantization operation, it is possible to effectively reduce system complexities while guaranteeing system performance.