SLNR (signal-to-leakage-and-noise ratio) beam forming based user need considered power distribution method

Abstract

The invention discloses an SLNR (signal-to-leakage-and-noise ratio) beam forming based user need considered power distribution method, and belongs to the technical field of beam forming in a wireless communication system. The problems of low fairness among different users and low satisfaction corresponding to each user when system performance is improved by an existing beam forming method are solved. The method includes: acquiring a feasible initial power value through an initial point selection algorithm; solving an approximate convex optimization problem of an established power optimization problem, and acquiring power distribution values of the users; acquiring a temporary optimum power distribution value; updating an SLNR beam forming method to obtain a corresponding beam forming matrix, and acquiring an optimum power distribution result. Or, an expression of a corresponding power distribution matrix when the SLNR received by a user side is in minimum need is obtained by adopting suboptimization and utilizing an expression of the SLNR and matrix transformation, and a power distribution value is acquired so as to obtain a final power distribution result. System performance, fairness among the different users and the satisfaction corresponding to each user achieve best compromise.

Description

technical field

[0001] The invention belongs to the technical field of beamforming in a wireless communication system, and in particular relates to a power allocation method based on SLNR beamforming and considering user requirements. Background technique

[0002] How to improve spectrum utilization while combating channel fading and interference, and improve system capacity while ensuring communication quality are urgent problems to be solved in the LTE-A system. Multi-user MIMO and beamforming technologies can achieve the purpose of enhancing the desired signal and suppressing inter-user interference, improving communication capacity and quality. Therefore, in the LTE-A standard, technologies such as multi-user MIMO and beamforming have also been further developed. development and application. In the downlink of TD-LTE-A, the non-codebook beamforming method has received more attention in recent years because it can take advantage of the channel reciprocity in TDD mode to ...

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