A method of power allocation based on multi-antenna non-orthogonal multiple access system

Abstract

The invention discloses a power allocation method based on a multi-antenna non-orthogonal multi-access system. A base station transmitting power allocation method is designed based on the property of the coexistence of intra-cluster interference and inter-cluster interference of the multi-antenna non-orthogonal multi-access system to reduce the interference of a mobile terminal and improve the performance of the system. A base station divides the mobile terminal into a plurality of clusters according to long-term statistical information of a downlink channel, and each cluster comprises a plurality of mobile terminals, so that the mobile terminal can conveniently counteract serial interference with low complexity. The mobile terminal estimates the downlink channel and feeds back a result to the base station after codebook quantization, so that the base station obtains the state information of the downlink channel. Then, the base station allocates power to transmitting signals according to the precision of the obtained state information of the downlink channel. The invention provides a simple but effective power allocation method for the multi-antenna non-orthogonal multi-access system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a power distribution method based on a multi-antenna non-orthogonal multiple access system. Background technique [0002] With the rise of the wireless Internet, the wireless network needs to provide more advanced wireless services and support the access of more wireless devices. Most current wireless networks use orthogonal access technologies, such as time division multiple access and frequency division multiple access. These orthogonal multiple access technologies allocate each radio resource block to only one mobile terminal, which seriously restricts the performance of the system and the number of connected terminals. In order to solve this problem, non-orthogonal multiple access technology is introduced into wireless communication, especially as one of the key technologies of the fifth generation mobile communication system. [0003] Non-orthogonal multiple access te...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a power allocation method based on a multi-antenna non-orthogonal multiple access system in order to solve the problems of narrow application range and high implementation complexity in the above scheme

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