首页>
外国专利>
A METHOD BASED ON GRADIENT ESTIMATION FOR ADAPTIVE ANALOG BEAMFORMING WITH A SINGLE RECEIVER CHAIN
A METHOD BASED ON GRADIENT ESTIMATION FOR ADAPTIVE ANALOG BEAMFORMING WITH A SINGLE RECEIVER CHAIN
展开▼
机译：基于梯度估计的单接收链自适应模拟波束成形方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method based on gradient estimation using perturbation sequence that brings in adaptability to an analog beamforming system and by use of which, beam can be steered to the direction of the desired signal while nullifying the interferers without any a priori knowledge of the signal directions is described. It involves processing the microwave beamformer output with the help of a training sequence. Since the adaptive technique requires processing of only the beamformer output signal, there is no need to monitor the received signal at each antenna array element. Further, use of variable phase shifters, attenuators and modified LMS method to find optimum weighting coefficients, for efficient beamforming, reduces the hardware complexity. This method makes successive corrections to the weight vector in the negative direction of the gradient vector, which finally concludes to minimum mean square error (MSE), at which the weight vector assumes its optimum value. Figure 4
展开▼
