Blind Spectrum Sensing Method Based on Frequency Domain Box Dimension
A spectrum sensing and box dimension technology, applied in digital transmission systems, transmission monitoring, electrical components, etc., can solve problems such as spectrum sensing limitations, and achieve simple and effective algorithms
Active Publication Date: 2016-12-07
HARBIN ENG UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there are serious limitations in using the box dimension of communication signal time series for spectrum sensing.
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
[0030] The present invention will be further described below in conjunction with accompanying drawing:
[0031] The invention provides a blind spectrum sensing method based on frequency domain box dimension. The steps of the method are as follows: first, the signal received by the cognitive radio sensing node is sampled to obtain a discrete time series signal, and a fixed length is intercepted from it, and then the intercepted time series is subjected to DFT transformation to convert it from the time domain to the frequency domain, and then the calculation Its box dimension, and finally compare the frequency domain box dimension value with the set decision threshold to distinguish the signal from the noise, judge the existence of the main user, and achieve the unknown prior knowledge of the main user signal and the uncertainty of the noise. The purpose of effective blind spectrum sensing under the situation. The method is simple and is less affected by the change of modulatio...
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 belongs to the technical field of cognitive radio spectrum sensing, and in particular relates to the occupancy of the frequency spectrum of a wireless channel by using the frequency domain box dimension value of the received signal when the prior knowledge of the primary user signal is unknown and the noise is uncertain. A Blind Spectrum Sensing Method Based on Frequency Domain Box Dimension for Blind Spectrum Sensing. The invention includes: sampling the signal received by the cognitive radio sensing node, obtaining a discrete time sequence, and intercepting a fixed length; converting the intercepted time sequence from the time domain to the frequency domain through DFT transformation; calculating the box dimension in the frequency domain ; Comparing the calculated frequency-domain box dimension with the decision threshold to obtain the spectrum occupancy. The present invention can use DFT to convert the received sequence from the time domain to the frequency domain within a certain range of signal-to-noise ratio in the absence of prior knowledge of the primary user signal and the uncertainty of the noise, and then calculate its box dimension to achieve Blind spectrum sensing, the algorithm is simple and effective.
Description
technical field [0001] The invention belongs to the technical field of cognitive radio spectrum sensing, and in particular relates to the occupancy of the frequency spectrum of a wireless channel by using the frequency domain box dimension value of the received signal when the prior knowledge of the primary user signal is unknown and the noise is uncertain. A Blind Spectrum Sensing Method Based on Frequency Domain Box Dimension for Blind Spectrum Sensing. Background technique [0002] With the rapid growth of people's demand for wireless communication, the shortage of spectrum resources has become an important problem restricting the development of communication technology. Cognitive radio technology changes the fixed spectrum allocation method in the past, so that licensed channels can be dynamically used by other users when they are idle, which can effectively solve the problem of shortage of spectrum resources, which is an inevitable trend of future communication developm...
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): H04B17/382H04L27/00
Inventor 李一兵富爽叶方林云黄诚李一晨陈杰
Owner HARBIN ENG UNIV