Demodulation device and demodulation method for FM signal
A technology of FM signal and demodulation device, which is applied in FM carrier system, carrier adjustment, modulated carrier system, etc., can solve the problem that the demodulation process of FM signal is not related demodulation, and affects the demodulation result of FM signal, etc., so as to avoid Influence, the effect of accurate demodulation process and accurate demodulation results
Active Publication Date: 2020-11-03
PHYPLUS INC
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The existence of these residual frequency offsets makes the demodulation process of the FM signal not a correlated demodulation, thus affecting the demodulation result of the FM signal
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized.
[0017] The first embodiment of the present invention relates to a demodulation device of a frequency modulation signal. Such as figure 1 As shown, the demodulation device includes a forward filter 11 , a compensation mechanism 12 , a frequency offset canceller 13 , an interference canceller 14 and an adaptive decision unit 15 .
[0018] T...
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The invention relates to the field of communication, and discloses a demodulation device and demodulation method for a frequency-modulated signal. The demodulation device for the frequency-modulated signal includes a forward filter, a compensation mechanism, a frequency offset eliminator, an interference eliminator and an adaptive decision device, wherein the forward filter is used to acquire a first signal that carries minimum phase information of the frequency-modulated signal; the compensation mechanism is used to generate a compensation signal according to a feedback signal and an initialphase of the frequency-modulated signal; the frequency offset eliminator is used to eliminate the residual frequency offset in the first signal according to the compensation signal to obtain a secondsignal; the interference eliminator is used to eliminate the inter-symbol interference of the second signal according to the feedback signal to obtain a third signal; and the adaptive decision deviceis used to perform adaptive decision according to the third signal and output a demodulation result of the frequency-modulated signal. According to the embodiment of the invention, in a demodulation process of the frequency-modulated signal, the residual frequency offset of the frequency-modulated signal is eliminated by generating the compensation signal, and thus the influence of the residual frequency offset on the demodulation result of the frequency-modulated signal can be avoided, the demodulation process of FSK frequency-modulated signals can be more accurate, and the demodulation result can be more accurate.
Description
technical field [0001] The invention relates to the communication field, in particular to a demodulation device and a demodulation method of a frequency modulation signal. Background technique [0002] FSK (Frequency-shift keying, frequency-shift keying) signal is a signal used for high-speed data transmission. In the demodulation process of the FM signal as the FM signal, the residual frequency offset in the FM signal needs to be considered. The existence of these residual frequency offsets makes the demodulation process of the FM signal not correlated demodulation, thereby affecting the demodulation result of the FM signal. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a demodulation device and demodulation method of a FM signal, so that in the demodulation process of the FM signal, the residual frequency offset in the FM signal can be eliminated by itself, thereby improving the demodulation result of the FM sig...
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IPC IPC(8): H04L27/14H04L27/148H04L27/152H04L27/00H04L25/03
CPCH04L25/03006H04L27/0014H04L27/14H04L27/148H04L27/152H04L2027/0026
Inventor 杨中奇
Owner PHYPLUS INC