Fast frequency hopping system for forwarding interference suppression in capture stage

Abstract

The invention relates to a point-to-point fast frequency hopping system for forwarding interference suppression in a capture stage. On the basis of receiving of a traditional point-to-point fast frequency hopping system, the point-to-point fast frequency hopping system increases a search detection branch unit and a peak value comparison and branch selection unit, and determines whether forwardinginterference exists through position relation comparison of the maximum peak value and the second maximum peak value of two search branches; if there is forwarding interference, phases corresponding to the maximum peak value and the second maximum peak value of one search branch are used as pre-tracking phases of the two branches to be started at the same time; and the branch with the peak value appearing first is selected as a real signal branch for the two branches with the synchronous head related peaks, and the branch is selected as a real signal branch for the two branches with only one synchronous head related peak. The point-to-point fast frequency hopping system solves the problem of influence of forwarding interference in a synchronous capture stage on communication transmission.

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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