Spectrum detection method and system based on joint time-frequency domain
A technology that combines spectrum and detection methods, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as small calculation amount, achieve accurate detection and solve the effect of spectrum detection problems
Active Publication Date: 2019-03-15
北京清瑞维航技术发展有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] For this reason, the purpose of the present invention is to propose a method based on joint spectrum detection in the time-frequency domain, by estimating the signal-to-noise ratio in the time domain and calculating the kurtosis value of the spectrum in the frequency domain, the joint time-frequency domain greatly improves the signal detection rate , and has a small amount of calculation, it solves the problem of spectrum detection in the environment of low signal-to-noise ratio or noise fluctuation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0026] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a joint time-frequency domain type spectrum detection method and system. The method comprises the following steps: setting a central frequency point and a bandwidth of a receiver; scanning signals within the bandwidth for multiple times; separately estimating a signal to noise ratio and calculating a peak value of a frequency spectrum according to multiple scanning results; and judging the existence of a stable signal if the signal to noise ratio and the peak value of the frequency spectrum according to the multiple scanning results satisfy any one of the following conditions: the number of signals in which estimation values of signal to noise ratios of the signals obtained in each scanning exceed a preset signal to noise ratio threshold exceeds a first preset ratio threshold; and if the number of signals in which the peak values of frequency spectrum of signals obtained in each scanning exceed a preset peak value exceeds a second preset ratio threshold. The joint time-frequency domain type spectrum detection method and system has the following advantages: the signal to noise ratio is calculated in the time domain, the signal peak value is calculated in the frequency domain, the final decision of whether signals exist is made through or criterion, quick and accurate detection of the signals is achieved, and the difficulty of spectrum detection in a low signal to noise ratio environment is solved.
Description
technical field [0001] The invention relates to the field of radio detection, and relates to a time-frequency domain joint frequency spectrum detection method and system. Background technique [0002] With the rapid development of wireless technology and the rapid development of wireless communication and detection services, wireless spectrum is increasingly becoming a scarce resource. The current fixed spectrum allocation method causes fixed frequency bands to be used only by fixed services, and these fixed services often do not occupy these frequency bands all the time, resulting in a serious shortage of spectrum resources on the one hand, and on the other hand some allocated Spectrum resources are wasted again. In order to solve this problem, the cognitive radio technology is proposed to search the idle licensed spectrum through spectrum sensing technology, and realize dynamic spectrum access without interfering with the communication of licensed users, so as to improve ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04W24/00
CPCH04B17/382H04W24/00
Inventor 王剑李刚
Owner 北京清瑞维航技术发展有限公司