Cognitive Anti-Jamming Fast Frame Synchronization Method with Low Overhead in Frequency Hopping Communication

A technology of frequency hopping communication and frame synchronization, applied in the field of frequency hopping communication, can solve the problem of lack of availability, and achieve the effect of low synchronization overhead, less quantity, and increased network overhead

Active Publication Date: 2022-06-07
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

In small terminal application scenarios, there is no condition for using multi-frequency point parallel reception joint detection method

Method used

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  • Cognitive Anti-Jamming Fast Frame Synchronization Method with Low Overhead in Frequency Hopping Communication
  • Cognitive Anti-Jamming Fast Frame Synchronization Method with Low Overhead in Frequency Hopping Communication
  • Cognitive Anti-Jamming Fast Frame Synchronization Method with Low Overhead in Frequency Hopping Communication

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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] In the present invention, the frame synchronization header includes a plurality of frequency hopping pulses (assuming the number of synchronization pulses is K), using different frequency points, and each pulse contains a complete frame synchronization code sequence, so that the receiving end can detect any one of the pulses. Frame capture and synchronization can be accomplished when synchronization detection is performed alone.

[0032] In the present invention, the sending end adopts the frame synchronization header method of redundant pulses when sending messages (including network access messages and service messages) by frequency hopping, that is, the message frame synchronization header contains multiple frequency hopping pulses (synchronization pulses) using different frequency points. The number of pulses is recorded as K), and each synchro...

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Abstract

The present invention provides a low-overhead cognitive anti-interference fast frame synchronization method in frequency hopping communication. After booting and initialization, spectrum sensing and noise power update before network access are performed, and the best synchronization frequency point selection before network access is selected, and then network access signals are performed. Frame synchronization and noise power update, spectrum sensing and noise power update during network time, select the best synchronization frequency during network time, and signal frame synchronization and noise power update during network time. The invention dynamically avoids the frequency points with severe interference, reduces the influence of interference on frame synchronization, improves the anti-interference ability of frequency hopping communication frame synchronization, automatically adapts to changes in channel environments, has a simple processing mechanism, and does not increase network overhead.

Description

technical field [0001] The invention relates to the technical field of frequency hopping communication, and proposes a method for comprehensively utilizing redundant synchronization pulses and frequency point cognitive information for low overhead, anti-interference, fast frame capture and synchronization, and is suitable for single-channel frequency hopping receiving terminals. Anti-jamming fast frame synchronization. Background technique [0002] The complexity of the electromagnetic environment and the existence of interference usually lead to the deterioration of some frequency channels used in frequency hopping communication, which affects the communication performance. Especially after the frame synchronization signal is affected, it is easy to cause signal acquisition failure and communication packet loss. For example, in an ordinary non-jamming frequency hopping communication system, the sender and the receiver agree on a certain frequency to transmit synchronization...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/715H04B1/7156H04B17/382
CPCH04B1/7156H04B1/715H04B17/382H04B2001/71563Y02D30/70
Inventor 万佳君张立冬刘飞段鹏石伟明
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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