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
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[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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