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A Realization Method of Frequency Hopping Synchronization Based on Time Information

A technology of frequency hopping synchronization and implementation method, which is applied in transmission systems, electrical components, etc., and can solve the problems of high cost, implementation complexity, resource occupation, establishment of time synchronization and anti-interference ability, etc.

Active Publication Date: 2020-01-31
CHENGDU AEROSPACE COMM EQUIP CO LTD
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  • Application Information

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Problems solved by technology

The existing technology has a large overhead on resource occupation, establishment time speed, synchronization anti-interference ability, etc., and the implementation complexity and cost are relatively high

Method used

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  • A Realization Method of Frequency Hopping Synchronization Based on Time Information
  • A Realization Method of Frequency Hopping Synchronization Based on Time Information
  • A Realization Method of Frequency Hopping Synchronization Based on Time Information

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Embodiment Construction

[0009] A method for realizing frequency hopping synchronization based on time information, comprising the following contents:

[0010] This algorithm uses a truncated TOD recovery algorithm to realize TOD frequency hopping synchronization. Practice shows that this algorithm can realize fast synchronization between the sending and receiving ends, and the air transmission data volume is small and the confidentiality is strong.

[0011] Table 1 TODh structure

[0012]

[0013] The existing TODh does not need to restore the algorithm, and can directly correct the local TOD information according to the originating TOD information.

[0014] The existing algorithm divides the 40-bit TOD information into two sections: TODh(25bits) and TODl(15bits):

[0015] TODh format: Bit39Bit38...Bit17Bit16Bit15

[0016] TODl format: Bit14Bit13...Bit2Bit1Bit0

[0017] Generally, TODh is used to represent year, month, day, hour, minute, and second, while TOD1 increases by 1 according to each j...

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Abstract

The invention discloses a method for realizing frequency hopping synchronization based on time information, comprising the following steps of: truncating TODh (formerly 25 bits) to 12 bits with 6 bitsin minutes and 6 bits in seconds; and when the receiving end receives the TODh of the originating end, making a decision with the local TODh: correcting the local TOD information by using the information of the originating TOD when the TOD value error of the originating end and the receiving end is less than the tolerance value. Compared with the prior art, the positive effect of the invention isthat: the invention adopts a novel truncated TOD structure and recovery processing algorithm, and only sends the most basic information: the value of minutes and seconds, thus reducing the time and number of bits of the information transmitted in space, saving resources, and reducing the chance of being disturbed. In addition, the remaining bits may also be used to transmit other system control information or synchronization information.

Description

technical field [0001] The invention relates to a method for realizing frequency hopping synchronization based on time information. Background technique [0002] Frequency hopping synchronization algorithm is one of the core problems in the field of frequency hopping communication. The methods of its realization mainly include: independent channel method, reference clock method, self-synchronization method and synchronous head method and so on. The frequency hopping synchronization method based on "time information (TOD, Time of Day)" is that the sender sends its own TOD information in the synchronization header sent, and the receiver extracts the TOD information of the sender by searching for the sender's synchronization signal. Use it to correct the TOD of the local end, so as to complete the frequency hopping synchronization. In order to resist tracking interference or forwarding interference, the higher the jump speed, the better the performance, and the shorter the du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7156
CPCH04B1/7156
Inventor 王建明曾碧玥范洪波张琴印玺成侯典奎
Owner CHENGDU AEROSPACE COMM EQUIP CO LTD
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