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A Robust Multigroup Multicast Beamforming Method

A beam and robust technology, applied in the field of robust multi-group multicast beamforming, can solve the problem of high computational complexity and achieve the effect of fast calculation

Active Publication Date: 2021-12-10
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0003] Existing classical robust multi-group multicast beamforming methods require a large number of Gaussian randomization steps and subsequent steps to solve the scaling factor, resulting in high computational complexity

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  • A Robust Multigroup Multicast Beamforming Method
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  • A Robust Multigroup Multicast Beamforming Method

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0046] The following is a specific implementation description for ensuring that the minimum SNR among users meets the given conditions:

[0047] Considering that the base station is equipped with 8 antennas, there are two groups in the communication scenario, and there are four users in each group. The channel satisfies an independent Gaussian distribution with a mean of 0 and a variance of 1, the Gaussian white noise received by the base station is 0dB, a...

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Abstract

The present invention relates to a robust multi-group multicast beamforming method. The method first obtains two basic scenarios in the multi-group multicast field: ensuring that the minimum SNR among users satisfies a given condition and maximizing the minimum SNR among users. The robust beamforming problem is relaxed into a convex problem to solve; then using the continuous convex approximation method, the obtained solution is used to relax the non-convex problem in the next iteration and iteratively solve it, and obtain the final approximation to the original problem through continuous iterative steps. Excellent solution. Compared with the prior art, the invention has the advantages of better robust performance, lower complexity, and is applicable to the needs of actual engineering.

Description

technical field [0001] The present invention relates to the field of multi-antenna technology, in particular to a robust multi-group multicast beamforming method. Background technique [0002] Multi-antenna technology is widely used in practical communication systems such as Long Term Evolution Advanced (LTE-A) and 5G. The system using multi-antenna technology can greatly improve the communication rate and communication quality without increasing the bandwidth, so it has received a lot of research by scholars. In some practical application scenarios, the data received between different users is the same, such as group chat, webcast, video conference, etc., and the transmission in this scenario is called multicast transmission. In the multicast transmission scenario, if the traditional point-to-point unicast technology is still used, a large amount of system resources will be wasted, resulting in a decrease in the overall system throughput and communication quality. Therefo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/0408H04B17/336
CPCH04B7/0617H04B17/336H04B7/0408
Inventor 杨峰丁良辉钱良易笃裕刘威
Owner SHANGHAI JIAOTONG UNIV
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