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A smart antenna downlink transmission power overload control method

A control method and transmission power technology, which is applied in the field of overload control of downlink transmission power of smart antennas, can solve the problems of undifferentiated antenna channels and the inability to judge whether the transmission power of a single antenna is overloaded, etc., so as to reduce performance loss and ensure normal operation.

Active Publication Date: 2014-08-20
ZTE CORP
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

This method can control the total downlink transmit power control on the base station side, but only considers the influence of the power control factor parameter, without distinguishing each antenna channel, that is, it cannot judge whether the transmit power of a single antenna is overloaded

Method used

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  • A smart antenna downlink transmission power overload control method
  • A smart antenna downlink transmission power overload control method
  • A smart antenna downlink transmission power overload control method

Examples

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Embodiment Construction

[0026] Such as figure 1 As shown, the method for protecting the downlink transmit power overload of the smart antenna of the present invention specifically includes the following steps:

[0027] 110) Based on the downlink beamforming weight vector, antenna correction weight vector, power control factor, and power compensation factor, calculate the downlink transmit power overload flag parameter of each antenna and the corresponding downlink composite weight of each user.

[0028] The downlink beamforming weight vector of the kth user is w (k) ={w (k, m) }| m=0,1,...,M-1 ; The power control factor of the kth user is The antenna correction weight vector is w AC = { w AC ( m ) } | m = 0,1 , · · · , M - 1 ; The power compensation factor of the kth user is α (k) ; The number of users is K, and the number of antennas is M.

[0029] Calculate the downlink transmit power overload flag parameter corresponding to the mth antenna,...

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Abstract

The invention relates to a method for controlling the downlink transmission power overload of a smart antenna, comprising: based on the downlink beamforming weight vector w(k)={w(k,m)} of each antenna and each user, and antenna correction weight vector power control factor and power compensation factor α(k), calculate each user’s downlink composite weight vector ω(k)={ω(k, m)} for each antenna and the sum of the squares of each user’s downlink composite weight corresponding to its own antenna. If the sum of the squares of the modulus is greater than 1, the downlink composite weight ω(k, m) of the user corresponding to the antenna is corrected so that the sum of the squares of the modulus is less than or equal to 1. This method can control the overload of any single antenna whose transmission power is overloaded in the smart antenna, so that the transmission power of each antenna can meet the design requirements, ensure the normal operation of system equipment, and minimize the performance loss of the system.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a method for controlling the overload of downlink transmission power of an intelligent antenna. Background technique [0002] The smart antenna is composed of an antenna array. Using the spatial characteristics of wireless signal transmission and digital signal processing technology, it can realize weight vector estimation and downlink beamforming, so as to reduce interference, increase capacity, expand coverage, improve communication quality, and reduce emission. Power and the purpose of increasing the wireless data transmission rate. [0003] Under the condition of a certain mobile speed of the user, for the synchronous code division multiple access CDMA communication system adopting the time division duplex TDD mode, the uplink and downlink channels meet the symmetrical requirements. If a smart antenna is used, the uplink receiving signal corresponding to the antenna array can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/005
Inventor 秦洪峰马毅华李斌
Owner ZTE CORP