Multi-signal detecting method for broadband

Abstract

The present invention is applied to radio electronics, telecommunication technology field, specifically a kind of detection method applied to broadband multi-signal, a kind of broadband multi-signal detection method, comprises the following steps: a. high-speed ADC collects signal; b. collects The signal is digitally channelized without blind spots; c. The wideband spectrum is spliced ​​and calculated for the digital channelized signals without blind spots to obtain the spectrum; d. The spliced ​​spectrum is multi-signal detected. By adopting the method of the present invention, the detection of broadband communication signals is realized. For a typical broadband application scenario of multiple communication signals with 1GHz bandwidth and 12dB signal-to-noise ratio, the detection time is only 200ms, the detection probability reaches more than 95%, and the false alarm probability less than 1%.

Description

technical field [0001] The invention is applied to the technical fields of radio electronics and telecommunication, and is specifically a method for detecting broadband multi-signals. Background technique [0002] With the development of communication technology, especially the rise of various new communication systems in recent years, signal detection technology has been widely used in the communication field. The existing signal detection method is mainly realized by FFT (Fast Fourier Transform), that is, after the data acquisition is completed, the data is first stored in the local cache, and then slowly read from the cache and completes the FFT transformation to realize signal detection presence or absence, and get an estimate of carrier frequency and bandwidth. Due to the serial working mode of this structure, it is difficult to take into account the processing speed and spectral resolution index, because the serial working mode mainly stores first and then performs FF...

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Problems solved by technology

Due to the serial working mode of this structure, it is difficult to take into account the processing speed and spectral resolution index, because the serial working mode mainly stores first and then performs FFT, so it is difficult to improve the frequency resolution due to the limitation of storage depth and the number of FFT points, and is limited by the memory Processing speed limitations make it difficult to achieve higher rates

Moreover, the existing signal detection methods usually use a single threshold for judgment, which is prone to false alarm detection. Due to the fluctuation of the spectrum, the detection threshold is affected by noise, and there will be small glitches, so there will be false alarms, which cannot meet the requirements of modern communication systems. Fast and accurate requirements for detection performance

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