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, and the method comprises the steps: obtaining a plurality of multi-user signals, separating the plurality of multi-user signals, and obtaining an independent user signal of each user; respectively converting the separated independent user signal of each user to obtain a time-frequency relation table of each independent user signal; determining a band-pass filter corresponding to the independent user signal based on the time-frequency relationship table corresponding to the independent user signal; filtering the corresponding independent user signal based on a band-pass filter to obtain each sub-carrier frequency signal of the independent user signal; for each independent user signal, performing down-conversion on the sub-carrier frequency signal to obtain a corresponding baseband signal; and performing modulation mode identification and symbol rate estimation on each independent user signal by using a corresponding baseband signal. According to the invention, each sub-carrier frequency signal can be effectively filtered, and the same sub-carrier frequency signal is prevented from being divided 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...

AI Technical Summary

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.

Images