Low-overhead cognitive anti-interference rapid frame synchronization method in frequency hopping communication

A frequency-hopping communication and low-overhead technology, which is applied in the field of anti-interference fast frame synchronization, can solve problems such as not having it, and achieve the effect of low synchronization overhead, simple processing mechanism, and increased network overhead

Active Publication Date: 2021-04-09
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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  • Low-overhead cognitive anti-interference rapid frame synchronization method in frequency hopping communication
  • Low-overhead cognitive anti-interference rapid frame synchronization method in frequency hopping communication
  • Low-overhead cognitive anti-interference rapid frame synchronization method in frequency hopping communication

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Embodiment Construction

[0030]The invention is further illustrated below with reference to the accompanying drawings and examples.

[0031]In the present invention, the frame synchronization header includes a plurality of hopping pulses (assuming the synchronous pulse number K), using different frequency points, each pulse includes a complete frame synchronization code sequence, allowing the receiving end to any one of them. Frame capture and synchronization can be completed when synchronous detection is performed separately.

[0032]In the present invention, the transmitting end is in the frame synchronization of the measurement pulse, that is, the message frame synchronization header contains a plurality of frequency hopping pulses (synchronization) using a plurality of frequency hopping pulses (synchronization) using a redundant pulse. The pulse number is only K), and each synchronous hopping pulse contains a complete frame with the end code, and the receiving end can complete frame capture and synchronizatio...

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Abstract

The invention provides a low-overhead cognitive anti-interference fast frame synchronization method in frequency hopping communication, which comprises the following steps of: after startup initialization, carrying out spectrum sensing and noise power updating before network access, selecting an optimal synchronization frequency point before network access, and then carrying out network access signal frame synchronization and noise power updating and spectrum sensing and noise power updating during network access, and selecting the optimal synchronization frequency in the network, and performing signal frame synchronization and noise power updating in the network. According to the invention, frequency points with serious interference are dynamically avoided, the influence of interference on frame synchronization is reduced, the anti-interference capability of frequency hopping communication frame synchronization is improved, the change of a channel environment is automatically adapted, the processing mechanism is simple, and the network overhead is not increased.

Description

Technical field[0001]The present invention relates to the field of frequency hopping communication, and the present invention proposes a method of comprehensive utilization of redundant synchronous pulses and frequency cognitive information for low overhead, anti-interference, fast frame capture and synchronization, suitable for single-channel frequency hopping receiving terminals. Anti-interference fast frame synchronization.Background technique[0002]The complexity of the electromagnetic environment and the presence of interference, usually lead to deterioration of the partial frequency channel channel used by frequency hopping communication, affecting communication performance, especially after the frame synchronization signal is affected, and it is easy to cause signal capture failure, resulting in communication packet loss. For example, in the ordinary non-anti-interference frequency hopping communication system, the transmit and receiving parties are transmitted in accordance w...

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Application Information

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Patent Type & Authority Applications(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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