Downlink beamforming method in mobile communication intelligent antenna system

A downlink and beamforming technology, applied in the field of downlink beamforming, can solve the problems of incompatibility, non-establishment of reciprocity, high requirements for amplitude and phase consistency, and achieve simple structure, high reliability, adaptability The effect of strong wireless environment capability

Active Publication Date: 2008-05-14
ZTE CORP
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Problems solved by technology

[0015] In order to overcome the above-mentioned shortcomings, solve the high requirements for the amplitude and phase consistency of the receiving channel and the transmitting channel of the wireless receiver and the transmitter in the prior art, and not adapt to the wireless propagation environment where the reciprocity of the uplink and downlink is not established, etc. technical problem

Method used

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  • Downlink beamforming method in mobile communication intelligent antenna system

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Embodiment Construction

[0040] The implementation of the method of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] figure 1 It is a flowchart of the method of the present invention. Such as figure 1 As shown, it is mainly: the base station using the smart antenna estimates the DOA of the received signal according to the received signal from the mobile station; firstly, the DOA of the estimated received signal is used as the initial value DOAini of the downlink beamforming DOA, and the calculation The weight vector of the downlink beamforming corresponding to DOAini-θ performs downlink beamforming on the mobile station; when the next adjustment period arrives, an adjustment step Δ is added on the basis of DOAini-θ as a new Beamforming direction, recalculate the weight vector of the new beamforming, and perform downlink beamforming on the mobile station; on the mobile station side, the mobile station measures the quality of the r...

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Abstract

This invention relates to one mobile communication intelligent antenna down linkage wave beam endows method, which is characterized by the following: the basic station measures and feeds back the linkage signals to adjust the down linkage-weighted vector. The advantages of this invention lie in the following: a, of not strict requirement of aptitude and phase of receiving and emission channels; b, suitable for upper and down linkage and easy for wireless environment and suitable for wireless environment; c, without strict correction of receiving and emission channels.

Description

technical field [0001] The invention relates to a novel downlink beamforming method, in particular to a downlink beamforming method in a wireless mobile communication smart antenna system. [0002] The present invention is suitable for frequency division duplex-time division multiple access / code division multiple access (Frequency Division Duplex-Time Division Multiple Access / Code Division Multiple Access) (hereinafter referred to as FDD-TDMA / CDMA) using smart antennas for downlink beam assignment It is especially suitable for Tine Division-Synchronous Code Division Multiple Access (Tine Division-Synchronous Code Division Multiple Access) (hereinafter referred to as TD-SCDMA) and wideband code division multiple access / time division duplex in the third generation mobile communication system (Wideband Code Division Multiple Access / Time Division Duplex) (hereinafter referred to as WCDMA / TDD) system. Background technique [0003] As a cellular mobile communication system, there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/36H04B7/26H01Q21/00H04W24/10H04B1/707
Inventor 郭俊峰曾召华
Owner ZTE CORP
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