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Chaotic synchronous realizing method based on GPS

An implementation method and frequency hopping synchronization technology, applied in the field of telecommunications, can solve the problems of cumbersome implementation, complex synchronization process, modifying the underlying communication protocol, etc., and achieve the effect of simplifying the process

Inactive Publication Date: 2009-10-07
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] After searching the existing technology, it is found that the Chinese patent "A Method for Realizing Frequency Hopping Synchronization by Orthogonal Frequency Division Multiplexing", patent number: 200510035709.6, this patent mentions the realization method of frequency hopping synchronization, but the hopping The frequency synchronization method has the following defects: (1) the synchronization process is relatively complicated (2) the underlying communication protocol needs to be modified, and the implementation is cumbersome

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  • Chaotic synchronous realizing method based on GPS
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  • Chaotic synchronous realizing method based on GPS

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Embodiment Construction

[0020] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0021] Such as figure 1 As shown, the block diagram of the chaotic frequency hopping system, in which: the sender first modulates the signal code through the carrier, and then the GPS receiver provides real-time clock information and second pulse signals to the frequency synthesizer. The frequency synthesizer changes the frequency according to the corresponding information to realize frequency hopping. The receiver uses the same frequency synthesizer to change the accepted frequency to achieve de-hopping, and then demodulates and restores the signal code. In this wa...

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Abstract

The invention relates to a chaotic synchronous realizing method based on GPS in the technical field of wireless digital communication. The method includes the following steps: a GPS receiving unit provides a globally uniform pulse per second signal and time code for each node of network; the whole network bottom layer uses ZIGBEE wireless communication protocol, the current time information is read after each node of the network is started, and the frequency hopping period and the time offset in the period are computed. The frequency of the next hopping of each node of the network is computed according to the time offset and the appointed frequency hopping computing formula, thereby finishing the de-hopping process. The invention can complete frequency hopping network deployment and frequency hopping communication; GPS time is used as third party time to carry out frequency hopping synchronization, thereby eliminating multiple information alternation by traditional frequency hopping synchronous method to complete frequency hopping synchronization, and simplifying the process of frequency hopping synchronization; and the chaotic frequency hopping sequence is used so that the whole frequency hopping system is more safe and reliable.

Description

technical field [0001] The present invention relates to a method in the technical field of telecommunication, in particular to a method for implementing chaotic frequency hopping synchronization based on GPS. Background technique [0002] According to the requirements of wideband, strong anti-prediction and deciphering ability and strong anti-jamming ability, the broadband frequency hopping system adopting chaotic frequency hopping technology is a good solution. The main working principle of this frequency hopping communication system is: In the end, the input signal code pair frequency is f s ’ Carrier is modulated to obtain a bandwidth of B m debug signal. The chaotic frequency hopping sequence generated by the opposition controls the frequency synthesizer to output the eigensignals of frequency hopping in different time slots. In the receiving end, the local frequency hopping sequence controls the frequency synthesizer, so that the frequency of the output eigensignal h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/713H04W56/00H04B1/7156
Inventor 陈佳品李振波曹斌双兵
Owner SHANGHAI JIAO TONG UNIV
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