Method for beam forming of down link, transmitting terminal and multi-cell cooperative system

Abstract

The embodiment of the invention discloses a method for beam forming of a down link, a transmitting terminal and a multi-cell cooperative system. The method disclosed by the embodiment of the invention comprises the following steps that: local channel information of the down link is exchanged by a first transmitting terminal and other transmitting terminals in the multi-cell cooperative system, the first transmitting terminal is an optional transmitting terminal in the multi-cell cooperative system, and the local channel information of the down link is the down link channel information of the transmitting terminal and each mobile terminal in the multi-cell cooperative system; an optimal weighted SINR (Signal Interference Noise Ratio)is determined by the first transmitting terminal through a two-layer hierarchical iterative algorithm, and the optimal weighted SINR is the largest weighted SINR which can be obtained by the mobile terminal with a worst channel condition; and a beam forming vector quantity and the transmitting power of the down link are determined by the first transmitting terminal according to the optimal weight SINR. The embodiment of the invention also discloses a device relative to the method. According to the device disclosed by the embodiment of the invention, the optimized rate performance of a system can be obtained by utilizing lesser information exchange capacity on the basis of ensuring the fairness of the mobile terminal.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a downlink beamforming method, a transmitting end and a multi-cell coordination system. Background technique [0002] With the rapid growth of wireless communication requirements, effective use of spectrum resources has become increasingly important. At present, cellular wireless systems are used in mobile communication systems to effectively use limited spectrum resources. In recent years, Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Out-put) communication technology has been fully developed. It is an effective way to use space resources to achieve high-speed link transmission, which can significantly increase the transmission rate and reliability of the communication system without adding additional spectrum and power, and is recognized as the key to the next generation of mobile communications One of the techniques. The research of poi...

AI Technical Summary

Problems solved by technology

Although the network MIMO technology based on multi-cell cooperation can significantly weaken or even completely eliminate the influence of inter-cell interference, thereby effectively improving the spectrum utilization of the system, the performance improvement is based on the surge in shared data information, signaling overhead, and computational complexity. cost, which is difficult to achieve with limited backhaul capacity

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