A differential frequency hopping communication method and system based on cognitive radio
A cognitive radio, differential frequency hopping technology, applied in transmission systems, electrical components, etc., can solve problems such as inefficiency, and achieve the effect of improving reliability, improving performance, and increasing network load
Active Publication Date: 2016-05-25
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It is not difficult to see that such a replacement strategy is blind and inefficient
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
[0040] The present invention will be further described below in conjunction with drawings and embodiments.
[0041] The present invention provides a differential frequency hopping communication method based on cognitive radio, including receiving and transmitting processes. combine figure 2 , the transmission process is: (1a) generate a frequency hopping sequence, a frequency synthesis signal and a frequency hopping frequency signal, synthesize the three into a transmission signal, filter out signals outside the frequency set to obtain a differential frequency hopping signal; The frequency sequence is generated by the following steps:
[0042] (a01) Set the detection frequency band range and the interference temperature limit, and perform noise detection on each frequency point within the detection frequency band range: for each frequency point, if the noise of the channel corresponding to the currently detected frequency point is higher than or equal to the interference tem...
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 relates to a differential frequency hopping communication method and system based on the cognitive radio. The method includes finding spectrum holes through the spectrum sensing function, feeding 'bad frequency points' with bad communication performance and 'replacement points' with fine communication performance and without signals into a transmitting frame header to implement adaptive frequency set updating, and implementing the differential frequency hopping. According to the method, the cognitive radio is combined with the differential frequency hopping communication, a differential frequency hopping network with the cognitive capability is provided, frequency points with concentrated frequencies are optimized dynamically according to frequency band interference or occupancy on the basis of acquiring the spectrum hole information through the spectrum sensing by the cognitive radio technology, the frequency points with concentrated frequencies are remained cleanly, and the performance, resisting partial band jamming and multi tone jamming, of the differential frequency hopping network is improved; the special frame header is modified to transmit the sensed frequency notification information, network load is not increased significantly, and the reliability of communication is improved.
Description
technical field [0001] The invention relates to a differential frequency hopping communication method based on cognitive radio, belonging to the field of wireless communication. Background technique [0002] Frequency hopping communication is one of the most widely used and effective techniques in tactical communication technology. After the US Sanders company announced the CHESS radio in 1996, the differential frequency hopping networking technology was first proposed at the US Military Communications Conference in 2003. Differential frequency hopping communication system is considered to be an important innovation of military communication system due to its high hopping speed, excellent anti-interception and anti-jamming characteristics. [0003] The basic idea of differential frequency hopping technology is to transmit information through related frequency hopping, that is, a certain correlation is established through data sequences between adjacent hopping frequencies...
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): H04B1/7136
Inventor 程卓王典洪张祥丽罗林波陈振兴
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)