A Fast Frequency Hopping System for Forwarding Interference Suppression in Acquisition Phase

Abstract

The invention relates to a point-to-point fast frequency hopping system for suppressing forwarding interference in the acquisition stage. On the basis of traditional point-to-point fast frequency hopping system reception, add a search and detection branch unit, a peak comparison and branch selection unit, and judge by comparing the positional relationship between the largest peak value and the second largest peak value of the two search branches Whether there is forwarding interference; if there is forwarding interference, the phases corresponding to the largest peak and the second largest peak of one of the search branches are used as the pre-tracking phases of the two branches to start at the same time, and the synchronization head correlation peak appears for both branches , select the branch whose peak value occurs first as the real signal branch, and if only one of the two branches has a synchronization head correlation peak, then select this branch as the real signal branch; the present invention solves the problem of forwarding interference in the synchronization capture stage The impact of communication transmission issues.

Description

technical field [0001] The invention relates to a processing method for identifying forwarding interference in the synchronous acquisition stage of a point-to-point fast frequency hopping system, and belongs to the technical field of anti-interference communication. Background technique [0002] At present, the vast majority of frequency hopping systems adopt a TOD-based synchronization scheme. The core of this synchronization scheme is that the frequency hopping frequency points of both the transceiver and the time are bound in a relationship, and the change rule of the frequency hopping frequency point (frequency hopping pattern) It is agreed by both parties in advance, so as long as the receiver obtains the TOD information of the sender, the receiving synchronization is completed. [0003] In order to improve concealment and save resources, the sender of the point-to-point fast frequency hopping system only initiates transmission when there is business, so the receiver mu...

AI Technical Summary

Problems solved by technology

In terms of power, generally speaking, the interference tends to be more powerful than the real signal, but this cannot be used as the basis for distinguishing the interference from the real signal during anti-interference. If the interference signal uses the combination of changing signal characteristics + low power, only the power The size is used as the basis for distinguishing, which may cause communication failure

[0006] In the currently visible anti-transfer interference of frequency hopping systems, it is often only mentioned to increase the hopping speed and use the time advantage to eliminate the impact of interference. This measure is effective in the tracking phase, but it does not consider the problem of forward interference in the capture phase.

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