Broadband signal detection and identification method and device
A broadband signal and identification method technology, applied in the field of signal processing, can solve problems such as complex implementation methods, inability to realize broadband signal detection and identification conveniently and quickly, and single function, achieve efficient frequency measurement and bandwidth measurement, and facilitate real-time detection and identification processing , the effect of processing less resources
Active Publication Date: 2020-05-26
北京中科飞鸿科技股份有限公司
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[0005] In short, in the signal receiver, the existing broadband signal detection and recognition implementation schemes have the disadvantages of single fu
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[0059] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0060] The embodiment of the present invention provides a broadband signal detection and recognition method, which mainly includes the following steps:
[0061] Step 1, performing analog-to-digital conversion processing on the sampled and received broadband signal;
[0062] Specifically, the received broadband signal can be AD-converted at a high sampling rate Fs (such as 250MHz, etc.) to obtain a sampling signal x(n), where n=1, 2, 3,..., N, N bei...
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The invention discloses a broadband signal detection and identification method and device. The method comprises the steps of carrying out analog-to-digital conversion on a sampled and received broadband signal and then carrying out multistage digital channelized filtering processing on the broadband signal; carrying out frequency spectrum splicing and smoothing processing on the signal after filtering processing; detecting the frequency and the bandwidth of the independent frequency points of the signals by adopting a channel threshold judgment mode, and performing harmonic frequency elimination processing on the signals to obtain the frequency and the bandwidth of broadband signals meeting actual requirements; extracting characteristic parameters of the signal after elimination processing, comparing the characteristic parameters with a preset threshold value, and determining a modulation mode of the signal in the effective channel according to a comparison result; and outputting the frequency and bandwidth of the broadband signal obtained by detection and the identification result of the signal modulation mode. According to the invention, the frequency measurement and bandwidth measurement of the broadband signal can be efficiently realized, and the identification of the analog/digital modulation mode of the broadband signal can be realized without any priori knowledge. In addition, the whole implementation scheme has the advantages of being low in operand, small in occupied processing resource and the like.
Description
technical field [0001] The present invention relates to the technical field of signal processing, in particular to a wideband signal detection and recognition method and device. Background technique [0002] With the development of communication technology, the bandwidth of signals used in the field of wireless communication is getting larger and larger, and the modulation types of signals are also becoming more and more diverse. In the field of electronic reconnaissance, the information of intercepted signals is obtained by designing reconnaissance receivers. In the process of acquiring and intercepting signals, in the face of complex electromagnetic environments, reconnaissance receivers must have real-time processing capabilities and be able to process large-bandwidth signals. [0003] Reconnaissance receivers usually include two types of analog signal receivers and digital signal receivers. Due to its poor environmental adaptability, analog signal receivers are gradual...
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Login to View More IPC IPC(8): H04L27/00
CPCH04L27/0012
Inventor 李学亮孙梦娜
Owner 北京中科飞鸿科技股份有限公司