Radio frequency single side band modulation method and radio frequency single side band modulator
A single sideband modulator and single sideband modulation technology, applied in the field of communication, can solve problems such as image interference, and achieve the effect of improving the ability to suppress image interference
Pending Publication Date: 2022-01-28
BEIJING RUNKE GENERAL TECH
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Since the frequency difference between the two sideband signals of the radio frequency signal is usually within 4MHz, and the ratio of the carrier frequency to the carrier frequency is between 0.04‰~4%, it is susceptible to image interference in practical applications
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[0047] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0048] Such as figure 1 As shown, a schematic flow chart of an implementation of a radio frequency single sideband modulation method provided by an embodiment of the present disclosure, the radio frequency single sideband modulation method may include:
[0049] S100. Obtain a first local oscillator signal and a second local oscillator signal, where a frequency difference between the second local oscillator signal and the first loca...
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According to a radio frequency single side band modulation method and a radio frequency single side band modulator provided by the invention, a first local oscillator signal and a second local oscillator signal can be obtained, and the frequency difference between the second local oscillator signal and the first local oscillator signal is equal to the modulation frequency of the preset modulation signal; performing first frequency mixing processing and filtering on the first local oscillator signal and a preset carrier signal to obtain a target frequency signal; and performing second frequency mixing processing and filtering on the target frequency signal and the second local oscillator signal to obtain a target single side band modulation signal. According to the method, the frequency of the modulation signal is reflected on the frequency difference of the two local oscillation signals, and through two-stage frequency mixing and filtering processing, the mirror image interference suppression capability of radio frequency single side band modulation can be greatly improved on the basis of the small-frequency modulation signal.
Description
technical field [0001] The present disclosure relates to the technical field of communication, and in particular to a radio frequency single sideband modulation method and a radio frequency single sideband modulator. Background technique [0002] In modern radar and communication applications, the carrier frequency range of radio frequency signals is between hundreds of MHz and 100 GHz, and the frequency range of small frequency modulation signals is generally between tens of Hz and 2 MHz. Since the frequency difference between the two sideband signals of the radio frequency signal is usually within 4MHz, and the ratio of the carrier frequency to the carrier frequency is between 0.04‰~4%, it is easy to suffer from image interference in practical applications. [0003] Since the frequency spectrum of the radio frequency signal includes upper and lower sidebands, both sidebands contain spectral components of the signal. The image frequency can be removed by single sideband mo...
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IPC IPC(8): H04L27/04
CPCH04L27/04
Inventor 吕文强王金花刘鑫
Owner BEIJING RUNKE GENERAL TECH