Downlink beamforming method in mobile communication intelligent antenna system

A downlink and beamforming technology, which is applied in the field of downlink beamforming, can solve problems such as inadaptability, high requirements for amplitude and phase consistency, and failure to establish reciprocity, and achieve simple structure and ability to adapt to wireless environments Strong, highly reliable effect

Active Publication Date: 2005-11-23
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 wirel

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. like 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 rece...

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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...

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Application Information

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IPC IPC(8): H04W24/10H01Q21/00H04B1/707
Inventor 郭俊峰曾召华
Owner ZTE CORP
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