The invention provides a low-feedback cellular network uplink Coordinated Multi Points (CoMP) method based on Interference Alignment (IA), through which the problem that the capacity of a cell edge in a cellular network is limited due to interference is solved. The method is characterized in that a precoding matrix quantization codebook is firstly designed according to the principle of prevention of losses of degrees of freedom; each base station measures a pilot sequence sent by a corresponding user terminal and obtains a channel state transition matrix through the channel estimation method, and a main base station calculates precoding matrixes and interference suppression matrixes based on the IA technology; and the main base station only sends a code number to each user terminal after carrying out quantization coding of the corresponding precoding matrix, and each user terminal carries out data coding according to the corresponding quantized precoding matrix, so that simultaneous and co-frequency transmission based on the IA technology is achieved. The method provided by the invention has the advantages that the transmission capacity of edge users in the cellular system is enlarged, and channel feedback expenses are reduced.

Low-feedback cellular network uplink Coordinated Multi Points (CoMP) method based on Interference Alignment (IA)

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Low-feedback cellular network uplink Coordinated Multi Points (CoMP) method based on Interference Alignment (IA)