Low-frequency 2FSK communication demodulation method, device and computer device
A 2FSK and communication demodulation technology, which is applied in the field of communication decoding, can solve problems such as the complexity of the algorithm process, and achieve the effects of strong anti-interference ability, low bit error rate and simple structure
Inactive Publication Date: 2018-12-21
WUHAN INSTITUTE OF TECHNOLOGY
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[0003] Aiming at the current technical problems, the present invention provides a low-frequency 2FSK communication demodulation method, device and computer equipment
This method adopts the method of software to realize the digital demodulation of low-frequency carrier communication, so as to solve the problem that the algorithm process of the demodulation method in the prior art is too complicated
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[0036] In the following description, for purposes of illustration rather than limitation, specific details, such as specific system architectures, interfaces, and techniques, are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0037] figure 1 It is a schematic flowchart of a low-frequency 2FSK communication demodulation method provided by an embodiment of the present invention.
[0038] Such as figure 1 As shown, the method includes:
[0039] S1: Obtain the low-frequency signal to be processed, and sample the low-frequency signal to be processed to obtain 2N sampling data, and the N is a positive integer;
[0040]...
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The invention relates to a low-frequency 2FSK communication demodulation method, a device and a computer device. The method comprises the following steps: acquiring a low frequency signal to be processed, sampling the low frequency signal to be processed, and obtaining 2N sampling data, wherein N is a positive integer; using N consecutive sampled data as window units to carry out moving traversal,andcarrying out Fast Fourier Transform on N sampled data in each traversal to obtain amplitude spectrum; Judging whether the N sample data includes a synchronization code according to the amplitude spectrum, and if so, demodulating the low-frequency data after the synchronization code from the N sample data currently traversed. The invention adopts FFT algorithm to carry out FFT operation on received data of each frame in low frequency mode, changes time domain signal into frequency domain signal, judging corresponding symbol according to frequency corresponding to amplitude spectrum maximumamplitude value, and adopts software method to realize digital demodulation of low frequency carrier communication, which has low bit error rate and strong anti-interference ability.
Description
technical field [0001] The invention relates to the technical field of communication decoding, in particular to a low-frequency 2FSK communication demodulation method, device and computer equipment. Background technique [0002] The technology used for communication decoding has different designs according to different requirements. At present, the binary frequency shift keying 2FSK demodulation adopts the hardware method, the structure is complex, the system consumes high energy, and the flexibility of use is poor, and there is currently no dedicated low-frequency carrier The dedicated hardware chip; and the algorithm process of some other demodulation methods is too complicated, which is not optimal for low-frequency transmission. Contents of the invention [0003] Aiming at the current technical problems, the present invention provides a low-frequency 2FSK communication demodulation method, device and computer equipment. The method adopts a software method to realize t...
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IPC IPC(8): H04L27/144H04L27/156
CPCH04L27/144H04L27/1566
Inventor 马小龙庞学亮王利恒
Owner WUHAN INSTITUTE OF TECHNOLOGY