Multi-antenna precoding method

A multi-antenna, precoding technology, applied in diversity/multi-antenna system, advanced technology, digital transmission system, etc., can solve the problem of not considering spectral efficiency or reliability optimization, etc., to improve system channel capacity, improve spectral efficiency, Reduce the effect of debugging work
CN103607256AActive Publication Date: 2014-02-26JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
Publication Date
2014-02-26

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Abstract

The invention provides a multi-antenna precoding method. Firstly, a first optimal precoding vector is calculated based on the calculation of the maximum transmission power of equipment. Secondly, the current specific absorption rate value of the multi-antenna equipment is calculated. Thirdly, a problem that whether the current specific absorption rate exceeds the specified limit value or not is judged, if the current specific absorption rate exceeds the specified limit value, the calculated first optimal precoding vector is determined as a final precoding vector, otherwise, based on a power normalized optimal precoding vector and the specific absorption rate limit value, the maximum allowable transmission power based on specific absorption rate limit is calculated, a second optimal precoding vector is calculated according to the maximum allowable transmission power, and the second optimal precoding vector is determined as a final precoding vector. According to the method, under the premise of satisfying SAR constraints, the spectrum efficiency and reliability of the multi-antenna equipment can be raised.
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Description

technical field

[0001] The present invention relates to a multi-antenna precoding method, in particular to a multi-antenna precoding method based on specific absorption rate constraints. Background technique

[0002] With the development of wireless communication technology, people are increasingly exposed to electromagnetic fields of various frequencies and strengths. Electromagnetic radiation has become a new type of special environmental pollution, especially the impact of electromagnetic radiation from mobile phones on human health has aroused great concern. When this type of equipment is used close to the face or body of a person, when the electromagnetic radiation power absorbed by the human body exceeds a certain limit, it will have adverse effects.

[0003] At present, many countries and scientific research organizations generally use the specific absorption rate (SAR) to evaluate the impact of electromagnetic radiation on the human body. SAR is defined as the elec...

Claims

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