A joint anti-jamming method for multi-sequence frequency hopping transceiver based on time-frequency coding

Abstract

Aiming at the problem that the existing frequency hopping systems have insufficient or insufficient ability to resist different interferences, a multi-sequence frequency hopping transceiver joint anti-jamming algorithm based on time-frequency coding is proposed. By introducing time-frequency cross coding, the multi-sequence frequency hopping system is jointly designed for transmission and reception: the sender encodes the information cross-redundantly, and transmits it from the time domain and frequency domain respectively, making it difficult for the interferer to track the dual channel; Narrowband matching decoding is extracted and designed, and information is obtained by majority decision, so as to effectively obtain coding gain and diversity gain. The simulation results show that compared with the conventional frequency hopping algorithm, the partial frequency band interference has a performance gain of about 13dB under moderate interference, and the tracking interference has a gain of about 8dB, and the signal is more difficult to be reconnaissance and tracking, which can effectively improve the anti-jamming capability in an all-round way.

Description

technical field [0001] The invention relates to a multi-sequence frequency hopping transceiver joint anti-jamming method based on time-frequency coding. Background technique [0002] With the development of science and technology, the transmission rate of communication systems has been continuously improved to meet people's increasing material life needs. However, the lack of anti-jamming capability of communication systems has become a shortcoming of its development, especially for military communication systems, which will be exploited and amplified, resulting in system paralysis. Therefore, the reliability of communication systems is worthy of research and attention. [0003] The conventional frequency hopping technology (Frequency Hopping / Binary Frequency-shift-keying, FH / BFSK) can effectively avoid some frequency band interference by randomly switching the carrier frequency, but frequency hopping is usually based on a fixed frequency hopping pattern, which is easy to im...

AI Technical Summary

Problems solved by technology

However, the above methods mainly rely on avoiding interference, that is, reducing the probability of being interfered as much as possible. The bit error rate performance is closely related to the channel being interfered with. There is room for further improvement in the means and capabilities of anti-interference.

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