A Beamformer Design Method for Multipath Signals

Abstract

The invention belongs to the field of radar and communication, and particularly relates to a beam forming device design method for multipath signals. The method includes the steps that firstly, relevance between the multipath signals is reduced through the space smoothing technology, and therefore a full-rank signal space covariance matrix is obtained; secondly, a minimum variance distortionless response beam forming device is constructed through matching with part of coming direction information of the known multipath signals; thirdly, proper schemes are selected on the basis of different conditions, mutual correlation vectors between the signals and data received by all sensors can be obtained, and the beam forming device used for receiving the minimum mean square error matched with the multi-route environment is designed on this basis. Compared with a traditional beam forming device, the problems that an existing beam forming device can not fully use the useful signals under multipath signal and array aperture loss exists are solved, the effective aperture of the array is increased, the multipath signals are fully used, and a reliable method is provided for multipath signal beam forming device design in the communication place, the phased array radar place and other places.

Description

technical field [0001] The invention belongs to the field of radar and communication, and in particular relates to a design method of a beamformer for multipath signals. Background technique [0002] Array signal processing is a branch of signal processing, which is widely used in radar, sonar, radio astronomy detection, medical detection and mobile communication. It refers to arranging multiple sensors in different positions in space in a certain way to form a sensor array , and then perform data processing on the sensor group. Beamforming techniques are an important aspect of array signal processing. Its essence is to achieve the purpose of enhancing the desired signal and suppressing interference as much as possible by weighting the data of each sensor. When processing the received space signal, compared with the traditional single directional sensor, the sensor array using beamforming technology has the advantages of flexible beam control, strong interference suppressi...

AI Technical Summary

Problems solved by technology

The traditional adaptive beamformer design method assumes that the interference and the received signal are independent of each other. However, in the process of various signal transmissions, the multipath effect often makes the useful signals received by the sensor array show correlation, which makes the conventional adaptive beamformer Adaptive Beamforming Method Performance Degrades Severely

Various decorrelation techniques represented by spatial smoothing can effectively reduce the correlation between signals. However, spatial smoothing will reduce the effective aperture of the sensor array. The shaper rejects the desired signal as interference

Images