Method for reducing synchronization time of frequency-hopping communication
A technology of synchronous time and frequency hopping synchronization, which is applied to electrical components, transmission systems, etc., can solve the problems of low synchronization probability, short synchronization time, and low false alarm probability, and achieve low false alarm probability, short synchronization time, and anti-interference powerful effect
Inactive Publication Date: 2016-08-24
10TH RES INST OF CETC
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[0004] The purpose of the present invention is to solve the problems of long synchronization time and low synchronization probability existing in the synchronization process of high-speed and complex frequency-hopping pattern frequency-hopping signals in the prior art, and to provide a method with short synchronization time, high capture probability and low false alarm probability. Frequency hopping synchronization method with low noise and strong anti-interference ability, which can significantly improve the synchronization performance of frequency hopping signals
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[0012] refer to figure 1 . In the preferred embodiment of the present invention described below, according to the present invention, use the frequency hopping synchronous circuit, after determining the frequency band that the frequency hopping signal is in, carry out sampling by high-speed AD, convert the frequency hopping signal of analog form into broadband digital Signal, based on the frequency hopping pattern and frequency hopping frequency point, divide the frequency band covered by the frequency hopping signal into channels, detect whether the signal appears in each channel, record the time when the signal appears in each channel, and record the frequency hopping point Mapping to generate a sequence of frequency hopping patterns, and correlating with the periodic sequences that generate frequency hopping patterns, to find out the position of the received signal in the frequency hopping pattern; the frequency control word generation module is based on the position of the ...
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The invention provides a method for reducing synchronization time of frequency-hopping communication. With the method, the synchronous performance of the frequency-hopping signal can be improved obviously. According to the technical scheme, the method comprises: with a frequency-hopping synchronization circuit, after a frequency band where a frequency-hopping signal is located is determined, channel division is carried out on a frequency band covered by the frequency-hopping signal based on a frequency-hopping pattern and a frequency-hopping frequency point, times of occurrence of signals in all channels are recorded, recorded frequency-hopping points are mapped into a sequence generating a frequency-hopping pattern, and the sequence correlates with a generated periodic sequence generating a frequency-hopping pattern and a position of a received signal in the frequency-hopping pattern is found out; and after the position of the signal in the frequency-hopping pattern is found out, an occurrence frequency point and occurrence time are determined by combining a local counter and a frequency point and time of occurrence of a next signal are determined, so that coarse synchronization is completed. After de hopping and demodulation are carried out on the signal after coarse synchronization, a precise frequency-hopping frequency point switching time is obtained, thereby realizing precise synchronization and tracking of the frequency-hopping signal.
Description
technical field [0001] The invention relates to a fast synchronization method mainly used for a frequency hopping signal receiving device in a frequency hopping communication system in the communication establishment stage. The invention can significantly reduce the synchronization time of the frequency hopping signal. Background technique [0002] Frequency hopping communication is an effective means of anti-interference and anti-intercept communication in the field of modern communication. One of the core technologies for the normal operation of frequency hopping communication is to realize the synchronization of the sending and receiving parties. The performance of frequency hopping synchronization has a great influence on the performance of frequency hopping communication system. The requirements for frequency hopping synchronization are: automatic, rapid, reliable, anti-interference, and rapid synchronization after out-of-synchronization. In the frequency hopping syst...
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IPC IPC(8): H04B1/7156
CPCH04B1/7156
Inventor 张波
Owner 10TH RES INST OF CETC
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