Wideband 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, including 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 consists of M The first array element is set as the reference array element, and the other M‑1 array elements are weight array elements; the retiming delay least mean square filter includes M‑1 groups of weight processing modules, two A unit delayer, a first adder, a unit delayer and a second adder; add several delay units after each antenna element, so that each array element forms a FIR filter, so that the array It has a certain frequency resolution ability, and by increasing the order of the FIR filter, the degree of freedom of the power inversion array is greatly improved, thereby effectively improving the bandwidth of interference suppression. Making the total delay time of the time-domain transversal filter longer than the maximum multipath propagation delay can realize interference suppression in a multipath environment.

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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