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Multi-sequence joint frequency hopping communication method combined with pseudo-random feature codes

A frequency hopping communication and feature code technology, applied in electrical components, transmission systems, etc., can solve problems such as bit error rate improvement, dual channel high energy, etc., to reduce the probability of bit errors, improve anti-interference ability, and reduce interference. the effect of the probability of

Active Publication Date: 2019-09-03
ARMY ENG UNIV OF PLA
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Problems solved by technology

This frequency hopping method has a better anti-tracking interference effect. However, when the interference signal hits the dual channel, there will be greater energy on the dual channel, and the bit error rate will increase significantly.

Method used

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  • Multi-sequence joint frequency hopping communication method combined with pseudo-random feature codes
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  • Multi-sequence joint frequency hopping communication method combined with pseudo-random feature codes

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Embodiment

[0048] A multi-sequence joint frequency hopping communication method combined with a pseudo-random feature code. After the user data is channel coded and converted, the frequency hopping sequence number is used to represent the user data. After the corresponding frequency hopping sequence is output, it is used as a frequency hopping by a frequency synthesizer. carrier. The pseudo-random signature sequence is used as the characteristic information of the data channel. After modulation, it becomes a characteristic signal. Finally, the characteristic signal is modulated onto the frequency hopping carrier and transmitted by the antenna through the radio frequency front end. At the receiving end, the signal received by the radio frequency front end is sent to N receiving branches, and each receiving branch uses a local frequency hopping sequence to perform frequency hopping synchronization on the received signal to complete frequency hopping demodulation. Then perform characteristi...

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Abstract

The invention relates to a multi-sequence joint frequency hopping communication method combined with pseudo-random feature codes, which is characterized in that on the basis of multi-sequence joint frequency hopping, the pseudo-random feature codes are modulated onto frequency hopping carriers in an in-band spread spectrum mode, and feature information except the carrier frequency is added to a data channel to serve as a mark for distinguishing signal sources. The receiver makes a decision by using the correlation between the known pseudo-random feature code and the transmitted signal, therebyreducing the error code caused by the occurrence of an interference signal in a multi-sequence frequency hopping dual channel. According to the invention, the anti-interference capability of multi-sequence joint frequency hopping communication is further improved.

Description

technical field [0001] The invention relates to an anti-interference frequency hopping communication method, in particular to a multi-sequence joint frequency hopping communication method combined with a pseudo-random feature code. Background technique [0002] Frequency hopping communication refers to the communication method in which the carrier of the transmission signal hops in the transmission frequency band according to pseudo-random rules, and the carrier frequency of the transmission signal of the sending and receiving parties changes pseudo-randomly according to the predetermined frequency hopping sequence. Since the interfering party does not know the frequency used by the current frequency hopping communication system, it cannot effectively interfere with the frequency hopping communication system. Frequency hopping communication has good anti-jamming and anti-interception capabilities, low detection probability and can suppress frequency selective fading. It is w...

Claims

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Application Information

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IPC IPC(8): H04B1/715H04B1/713
CPCH04B1/713H04B1/715
Inventor 全厚德孙慧贤王耀北黄欣鑫崔佩璋李召瑞
Owner ARMY ENG UNIV OF PLA
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