The invention discloses an SLNR-based beam forming method for a CoMP-JP
system and belongs to the field of beam forming for a mobile communication
system. By the adoption of the SLNR-based beam forming method for the CoMP-JP
system, the problem that when the SLNR
algorithm is used for transmission of multiple streams, the
bit error rate performances of substreams are not balanced is solved. The SLNR-based beam forming method for the CoMP-JP system comprises the steps that firstly, an original
precoding vector and an original
precoding matrix are obtained for each user according to the existing SLNR
precoding algorithm; secondly, for each user, the
weighting coefficient is obtained according to the corresponding precoding vector obtained in the first step based on the two criteria of eliminating the difference between the streams and eliminating interference between the streams, and then an expression matrix used for linear transformation is constructed; thirdly, with the original precoding vectors as the bases, linear transformation is conducted on the original
precoding matrix by means of the constructed expression matrix used for linear transformation, so that a group of new precoding vectors are obtained, and then a WSLNR
precoding matrix is obtained; fourthly,
signal forming is conducted by means of the obtained WSLNR
precoding matrix, and then forming of the original precoding vectors is completed. The SLNR-based beam forming method is mainly used for beam forming in the communication field.