Short-wave communication method and system for suppressing narrow-band interference
A short-wave communication and narrow-band interference technology, which is applied in transmission systems and electrical components, can solve problems affecting the reliability of communication systems, loss of useful signals, failure to successfully detect useful signals, etc., and achieve the effect of improving the quality of short-wave communication
Active Publication Date: 2019-12-24
WUHAN POLYTECHNIC UNIVERSITY
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Problems solved by technology
In short-wave communication, if narrow-band interference is only suppressed by spread-spectrum technology, one may lead to the failure to detect useful signals, and the other may cause loss of useful signals while suppressing narrow-band interference, thereby affecting communication. system reliability
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[0036] Preferred embodiments of the present invention will be described in more detail below. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be embodied in various forms and should not be limited by the embodiments set forth herein.
[0037] figure 1 A flow chart of shortwave communication suppressing narrowband interference according to an exemplary embodiment of the present invention is shown. Such as figure 1 As mentioned above, the method includes step S1 to step S6.
[0038] In step S1, an analog-to-digital conversion is performed on the original analog signal to convert it into a digital signal.
[0039] In a communication system, the original signal is usually an analog signal, but due to the many advantages of digital signal processing, what is processed in a communication system is usually a digital signal, so the analog signal is first converted to analog / digital (A / D) and convert...
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The invention proposes a short-wave communication method and system for suppressing narrow-band interference. The method includes: performing analog-to-digital conversion on the original analog signal and converting it into a digital signal; performing direct-sequence spread spectrum and modulation on the digital signal, and then transmitting the digital signal through a channel; converting the received signal from the multi-component signal Decompose into N-order single-component signals; determine the frequency characteristics of each single-component signal, use the second-order to N-th order components to extract interference signals; filter out the extracted interference signals, and reconstruct the received signal; After the signal is despread and demodulated, the final received data is obtained by digital-to-analog conversion. According to the short-wave communication method and system for suppressing narrow-band interference of the present invention, the interference signal can be effectively separated from the received signal, and filtered by a narrow-band phase-locked loop adaptive filter, thereby improving the quality of short-wave communication.
Description
technical field [0001] The invention belongs to the field of short-wave communication, and more specifically relates to a short-wave communication method and system for suppressing narrow-wave interference. Background technique [0002] Spread spectrum technology is widely used because of its strong anti-interference ability, but this anti-interference ability is not very effective for narrow-band interference in short-wave communication. In short-wave communication, if narrow-band interference is only suppressed by spread-spectrum technology, one may result in the failure to detect useful signals, and the other may cause loss of useful signals while suppressing narrow-band interference, thereby affecting communication. System reliability. Therefore, it is necessary to develop a short-wave communication method and system that can effectively suppress interference. Contents of the invention [0003] In order to achieve the above object, the present invention proposes a sh...
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IPC IPC(8): H04B1/69H04B1/707H04B1/7097H04B1/71
CPCH04B1/69H04B1/707H04B1/7097H04B1/71
Inventor 杨蕾吴雷
Owner WUHAN POLYTECHNIC UNIVERSITY