Method and apparatus for transmitting data

摘要

Embodiments of the present disclosure provide a data transmission method and an apparatus. The method mainly includes: forming multiple antennas of a BS (base station) into a cross polarization antenna array, and calculating a weighted matrix of a to-be-transmitted data stream of the BS according to channel information between the BS and an MS (mobile station); performing weighted processing on the to-be-transmitted data stream of the BS according to the weighted matrix, and sending a data stream that has undergone the weighted processing from the BS to the MS. The embodiments of the present disclosure may enhance the demodulation performance because the cross polarization antenna array is adopted at the BS, and certain irrelevancy exists between cross antennas; therefore, the embodiments of the present disclosure may significantly enhance the overall performance of sending the data stream from a BS side to an MS side.

主权项

1. A data transmission method, wherein multiple antennas of a base station (BS) form a cross polarization antenna array, the method comprising:
calculating a weighted matrix of a to-be-transmitted data stream of the BS according to channel information between the BS and a mobile station (MS); and performing weighted processing on the to-be-transmitted data stream of the BS according to the weighted matrix, and sending a data stream that has undergone the weighted processing from the BS to the MS, wherein the calculating a weighted matrix of a to-be-transmitted data stream of the BS according to channel information between the BS and the MS comprises: obtaining a column vector h1 of a channel response between each antenna of the BS and a certain antenna of the MS, and then a first column vectorw1=h1*h1  of the weighted matrix w, wherein the vector h1* indicates a conjugate of h1, and ∥h1∥ indicates a modulus value of the vector h1; and obtaining a second column vector w2, which is an orthogonal vector of the first column vector w1, of the weighted matrix w; wherein the weighted matrix w=[w1, w2].