Broadband interference suppression device and suppression method based on space-time power inversion array

Abstract

The invention provides a broadband interference suppression device and suppression method based on a space-time power inversion array. The broadband interference suppression device comprises a space-time two-dimensional power inversion array structure and a retiming delay minimum mean square filter, the space-time two-dimensional power inversion array structure is composed of M array elements, the first array element is set as a reference array element, and the other M-1 array elements are set as weight array elements; the retiming delay minimum mean square filter comprises (M-1) groups of weight processing modules, two unit delayers, a first summator, a unit delayer and a second summator, a plurality of delay units are added behind each antenna array element, so that an FIR (Finite Impulse Response) filter is formed behind each array element, the array has certain frequency resolution capability, and the degree of freedom of the power inversion array is greatly improved by increasing the order of the FIR filter, so that the bandwidth of interference suppression is effectively improved. And the total delay time of the time domain transverse filter is greater than the maximum multipath propagation delay, so that interference suppression in a multipath environment can be realized.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a broadband interference suppression device and suppression method based on a space-time power inversion array. Background technique [0002] Wireless communication stations are widely used in military and civilian fields such as field expeditions, emergency relief, and naval and aircraft communications. They have the advantages of stable signals and high safety, and are also important equipment for long-distance line-of-sight communications. However, in a complex electromagnetic environment, communication stations are susceptible to multi-pattern interference from co-platform transmitters or enemy jammers, and the communication robustness is poor. Especially in the spread spectrum communication system, it is necessary to suppress the broadband interference signal within the spread spectrum bandwidth. [0003] In order to solve the same-frequency broadband interference...

AI Technical Summary

Problems solved by technology

All have disadvantages such as poor real-time performance of the algorithm, incapability of high-speed pipeline operation, and unfavorable engineering realization, etc., and have not been able to overcome the suppression problem of large-bandwidth communication interference under multi-path channels.

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