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Signal to leakage noise ratio (SLNR)-based two-stage precoding method in large-sale MIMO FDD system

A signal-to-leakage-to-noise ratio, large-scale technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as high complexity and decreased overall system rate performance

Active Publication Date: 2015-12-16
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the complexity of the JSDM method is relatively high, and when the transmitted signals of two adjacent groups of users overlap with the angle of arrival of the base station, the overall rate performance of the system drops significantly

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  • Signal to leakage noise ratio (SLNR)-based two-stage precoding method in large-sale MIMO FDD system
  • Signal to leakage noise ratio (SLNR)-based two-stage precoding method in large-sale MIMO FDD system
  • Signal to leakage noise ratio (SLNR)-based two-stage precoding method in large-sale MIMO FDD system

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[0030] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] Such as figure 1 As shown, the two-stage precoding method based on SLNR in the massive MIMOFDD system of the embodiment of the present invention includes the following steps:

[0032] (1) The base station obtains the statistical CSI of all users in the cell, and groups the users in the cell according to the statistical CSI of the users, and calculates the average value of the statisti...

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Abstract

The invention discloses a signal to leakage noise ratio (SLNR)-based two-stage precoding method in a large-scale MIMO FDD system. The operation complexity of precoding design of a first stage of each group of users is low, and the overall rate performance of the SLNR two-stage precoding method provided by the invention is superior to a JSDM precoding method proposed by Junyoung Nam et al. In addition, the method provided by the invention performs precoding design based on the SLNR of each group of users, does not cause channel state information loss, and does not influence performance of SLNR two-stage precoding even if angles of arrival of sending signals of two adjacent groups of users and a base station overlap.

Description

technical field [0001] The invention belongs to the technical field of multi-antenna and wireless communication, and more specifically relates to a two-stage precoding method based on signal-to-leakage-to-noise ratio in a large-scale MIMO FDD system. Background technique [0002] In recent years, Multiple Input Multiple Output (Multiple Input Multiple Output, MIMO) technology has been widely used in wireless communication systems. This technology can significantly improve the spectrum utilization of wireless systems without increasing additional bandwidth and power loss. However, with the popularity of wireless devices such as smartphones, people's demand for data traffic is increasing exponentially. To solve this problem, people have gradually launched research on massive MIMO systems. The massive MIMO system can provide higher spectrum utilization and system throughput, and effectively solve problems such as the shortage of spectrum resources. So far, research on massive ...

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Application Information

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IPC IPC(8): H04B7/06H04B7/04
CPCH04B7/0413H04B7/0456H04B7/0626
Inventor 江涛邱双陈达
Owner HUAZHONG UNIV OF SCI & TECH
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