A communication reconnaissance simulation method and system suitable for multi-user signals

Abstract

The invention discloses a communication reconnaissance simulation method and system suitable for multi-user signals. The method includes: acquiring a plurality of multi-user signals, separating the multi-user signals to obtain an independent user signal of each user; The independent user signals of each user of the user are respectively transformed to obtain the time-frequency relationship table of each independent user signal; based on the time-frequency relationship table corresponding to the independent user signal, the band-pass filter corresponding to the independent user signal is determined; based on the band The pass filter filters the corresponding independent user signal to obtain each sub-carrier frequency signal of the independent user signal; for each independent user signal, the sub-carrier frequency signal is down-converted to obtain the corresponding baseband signal; for each independent user signal The user signal uses the corresponding baseband signal to identify the modulation mode and estimate the symbol rate. The invention can effectively filter out each sub-carrier frequency signal and avoid dividing the same sub-carrier frequency signal into two adjacent channels.

Description

technical field [0001] The invention relates to the technical field of communication signal processing, in particular to a communication reconnaissance simulation method and system suitable for multi-user signals. Background technique [0002] At present, in the face of an information countermeasure environment where there are multiple user signals for communication at the same time, the frequency coverage is large, and the electromagnetic environment is relatively complex, digital channelization technology is usually used in reconnaissance reception to divide the reception processing bandwidth to form a series of sub-channels , respectively identify and analyze each narrowband sub-channel signal. [0003] For the complex electromagnetic environment where multiple users communicate, the digital channelized receiving equipment in the prior art is complex to implement, and the interval between each sub-channel is fixed when the channel is divided, and the channel division form...

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Problems solved by technology

[0003] For the complex electromagnetic environment where multiple users communicate, the digital channelized receiving equipment in the prior art is complex to implement, and the interval between each sub-channel is fixed when the channel is divided, and the channel division form cannot be automatically adjusted according to the carrier frequency interval of each user, which affects the system utilization. For the signal between two adjacent sub-channels, it is easy to be divided into two sub-channels for separate processing, which affects the accuracy of subsequent communication parameter detection and identification.

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