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A multi-sequence joint frequency hopping communication method combined with pseudo-random signature code

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

Active Publication Date: 2021-10-08
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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  • A multi-sequence joint frequency hopping communication method combined with pseudo-random signature code
  • A multi-sequence joint frequency hopping communication method combined with pseudo-random signature code
  • A multi-sequence joint frequency hopping communication method combined with pseudo-random signature code

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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 a pseudo-random signature code. On the basis of the multi-sequence joint frequency hopping, the pseudo-random signature code is modulated onto a frequency-hopping carrier by means of in-band spread spectrum. Add characteristic information other than the carrier frequency to the data channel as a sign to distinguish the signal source. The receiver uses the correlation between the known pseudo-random signature code and the transmitted signal to make a judgment, and reduces the bit error caused by the interference signal appearing in the dual channel of multi-sequence hopping. The invention further improves the anti-interference ability of multi-sequence joint frequency hopping communication.

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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Patent Type & Authority Patents(China)
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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