Device and method for estimating angle of high-precision array antenna receiving system

Abstract

The invention discloses a device and a method for estimating an angle of a high-precision array antenna receiving system, which mainly solve the problems that the existing technical angle is low in estimating precision, high in operation complex degree, and poor in system stability. The device comprises an array antenna signal receiving module, a radio frequency module, a self-adaption weight setting module and an angle estimating module. The method comprises the following steps: receiving signals by the array antenna receiving system; setting a self-adaption weight for each array element; calculating output signal power of the system; selecting a self-adaption iterative method and determining an initial value and iteration stopping conditions in iteration process; and searching the best weight vector. The device and method have the advantages of being high in angle estimating accuracy, low in operation complex degree and good in system stability.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a device and method for estimating the angle of arrival of signals of an array antenna receiving system in the field of array signal processing. The invention uses a signal power maximization self-adaptive iterative method based on the array antenna receiving system to realize high-precision angle estimation of the array antenna receiving system. Background technique [0002] With the development of communication technology, in order to improve the system capacity, array antennas have been used in many systems, which will involve the angle estimation of the array antenna receiving system. At present, there have been a lot of theoretical research and experimental test results in this area. Research results It shows that the accuracy of angle estimation determines the performance of array antenna receiving system, so improving the accuracy of angle estimation is the key...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the accuracy of angle estimation is not high, and it is known that the calculation complexity is high and the stability is poor due to the need to obtain the user's channel impulse response matrix and subsequent calculation steps

The weak point of this method is: in concrete implementation steps, when setting the peak value detection threshold value, this threshold value will obtain according to the difference value of the multipath power that requires detection relative to the main path power, and this difference value is relatively small. It is difficult to obtain, so the feasibility of this method is poor, and the signal-to-noise ratio of the system signal is required to be high, and the accuracy of angle estimation will decrease with the decrease of the signal-to-noise ratio

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