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Rapid frequency hopping synchronization method based on TODh

A frequency hopping synchronous and fast technology, applied to electrical components, transmission systems, etc., can solve problems such as systems that cannot communicate normally

Active Publication Date: 2020-10-23
UNIT 63892 OF PLA
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  • Claims
  • Application Information

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Problems solved by technology

Among them, the synchronization prefix method is widely used in the establishment of frequency hopping synchronization because of its fast search speed and reliable synchronization performance. However, when the transmission of the synchronization header is interfered by the system itself or the outside world, the system will also be affected and cannot work normally. communication

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  • Rapid frequency hopping synchronization method based on TODh
  • Rapid frequency hopping synchronization method based on TODh
  • Rapid frequency hopping synchronization method based on TODh

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] see figure 1 , is an embodiment of a TODh-based fast frequency hopping synchronization method proposed by the present invention. This embodiment includes the following steps:

[0032] Step 1: The transmitter sends the synchronization header: after starting the communication, the sender sends the synchronization header. The number of synchronization jumps is determined according to the minimum unit of TODh and the tolerable synchronization time difference between the sender and receiver. The synchronization frequency is calculated according to the TODh information of the transmitter. The synchronization frame includes Pre-protection, post-protection and synchronization sequence, and different synchronization frequencies correspond to...

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Abstract

The invention discloses a rapid frequency hopping synchronization method based on TODh. The method comprises the following steps that: after communication starts, a transmitter sends a certain numberof synchronization hops as synchronization heads, the synchronization frequency is calculated according to TODh information, a synchronization frame comprises a front protection sequence, a rear protection sequence and a synchronization sequence, and different synchronization frequencies correspond to different synchronization sequences; a receiver calculates a search frequency according to TODh information of the receiver, and performs parallel capture on the frequency based on all synchronization sequences; the position of a synchronization hop is judged according to the matched synchronization sequence after successful capture, and the TODh difference value between the receiver and the transmitter is further judged; and the receiver performs TODh correction and automatically supplementsTOD1 information to calculate the service hopping frequency, and synchronization succeeds. The TODh information can be hidden in the synchronization frequency and the synchronization sequence, directsending is not needed, the receiving end searches and captures on the specific frequency, capturing can be completed in one group of synchronization hops, and the method has the advantages of being short in synchronization time, reliable in synchronization, easy and convenient to operate, wide in application range and the like.

Description

technical field [0001] The invention belongs to the field of frequency hopping communication system design, in particular to a fast and reliable frequency hopping synchronization method based on TODh. Background technique [0002] Frequency hopping communication technology has been widely used in military and civilian fields because of its characteristics of anti-enemy jamming, anti-noise and multi-path interference, and anti-multi-user interference. Frequency hopping synchronization is one of the key technologies to realize frequency hopping communication. Only when the sending and receiving parties are in the synchronization state of the same frequency hopping pattern and the same hopping law can stable communication be established. Therefore, the performance of the synchronization algorithm has a direct impact on the performance of the entire frequency hopping communication system. [0003] Traditional synchronization methods mainly include self-synchronization method, i...

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Application Information

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IPC IPC(8): H04B1/7156
CPCH04B1/7156H04B2001/71563
Inventor 任丙印牛腾张永鑫周食耒郭鹏程徐忠富王海军杨小军杨志飞贺正求葛海龙李金梁王继祥严长伟
Owner UNIT 63892 OF PLA
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