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Multi-cell combined beamforming design method for maximizing throughput

A beamforming and design method technology, applied in the field of multi-cell joint beamforming design, can solve problems such as no solution algorithm is given

Inactive Publication Date: 2015-04-22
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0008] "Multi-cell uplink-downlink beamforming throughput duality based on Lagrangian duality with per-base station power constraints" by J.Yang and D.K.Kim Shaping)” IEEE Communications Letters, vol.12, no.4, pp.277-279, Apr.2008, deriving the Lagrangian dual problem and beamforming vector structure of system downlink throughput under the power constraint of each base station , but no solution algorithm is given, and it is assumed that each cell has a single user, and there is no intra-cell interference

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  • Multi-cell combined beamforming design method for maximizing throughput
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  • Multi-cell combined beamforming design method for maximizing throughput

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Embodiment Construction

[0048] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0049] The multi-cell joint beamforming design method for maximizing throughput disclosed in the present invention is based on the Lagrangian dual derivation of the uplink dual problem of the multi-cell multi-user downlink throughput maximization problem, and performs beamforming by solving the uplink dual problem. Forming the design, the downlink optimization problem is:

[0050] max Σ m , k log ( 1 + p m ...

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Abstract

The invention discloses a multi-cell combined beamforming design method for maximizing throughput, belonging to the technical field of wireless communication. The method comprises the steps of: obtaining a duality uplink problem based on a Lagrange duality theory, iteratively solving the duality uplink problem by adopting a generalized characteristic value decomposition and interior point method, determining a downlink unit beamforming vector and an optimal uplink signal to interference and noise ratio, and obtaining downlink power distribution based on equal duality of uplink and downlink signal to interference and noise ratios. The method disclosed by the invention can be used for acquiring higher system throughput and saving calculation time when the number of users is larger.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless communication, in particular to a multi-cell joint beamforming design method for maximizing throughput. Background technique [0002] In recent years, with the rapid development of wireless communication technology, the requirements of large traffic volume, high speed and high spectral efficiency of wireless communication have become increasingly urgent. In the next-generation wireless communication system, the frequency reuse factor is 1, and severe co-channel interference (Co-Channel Interference, CCI) exists. As a key technology to suppress CCI, beamforming technology has been developed rapidly and widely used. However, traditional single-cell processing regards inter-cell interference as noise, which restricts the significant improvement of system performance. Multi-cell joint processing utilizes information interaction between base stations to collaboratively design tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/28
Inventor 张茜何晨蒋铃鸽
Owner SHANGHAI JIAOTONG UNIV
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