Multi-point coordinated transmission method based on limited feedback in heterogenous network system

The invention provides a multi-point coordinated transmission method based on limited feedback in a heterogenous network system. The multi-point coordinated transmission method includes that quantitative channels and channel module values are fed back by users of first transmitting nodes; a plurality of users of a plurality of second transmitting modes search and find preset code words, and a feedback information set is generated according to indexes and interference values of the preset code words; weight vectors of downlink transmitting beams of the first nodes are determined by the first transmitting nodes according to shared feedback information, and scheduling users of the first transmitting nodes and scheduling users of the second transmitting nodes are determined; the scheduling users of the second transmitting nodes feed back quantitative channels of the scheduling users to the corresponding second transmitting nodes according to codebooks; and vectors of downlink transmitting beams are determined by the second transmitting nodes according to the quantitative channels, so that the first transmitting nodes and the second transmitting nodes simultaneously transmit downlink data via the respective beams. According to an embodiment of the invention, the feedback efficiency of the heterogenous network system is effectively improved, system overhead is reduced, and fine system performances are realized.