A Synchronization Method Applicable to High Bit Rate FM Signal
A frequency modulation signal, high bit rate technology, applied in the direction of synchronization device, synchronization device, synchronization error detection, etc., to achieve the effect of improving detection performance, high synchronization accuracy, and low synchronization threshold
Active Publication Date: 2022-05-20
北京融为科技有限公司
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Problems solved by technology
[0006] For this reason, the purpose of the present invention is to propose a kind of synchronous method suitable for high code rate FM signal, to solve the problem mentioned in the background technology, overcome the deficiency existing in the prior art
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[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0043] The invention proposes a synchronization method suitable for high code rate frequency modulation signals, which can solve the problem that the existing synchronization technology is not suitable for high code rate frequency modulation signals or the synchronization accuracy is poor. The implementation process of this method involves interpolation filter, multi-symbol detection MSD detection, cross-product frequency discrimination, automatic gain control AGC, advanced accumulation, lag accumulation, timing error calculation,...
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The present invention proposes a synchronization method suitable for high code rate FM signals, comprising: resampling the input signal through an interpolation filter; performing multi-symbol detection MSD detection on the resampled signal to obtain an output signal; After the resampled signal is subjected to cross-product frequency discrimination and automatic gain control AGC, advanced accumulation and lag accumulation are performed respectively, and then the timing error is calculated for the advanced accumulation value and the lag accumulation value to obtain the timing error, and the timing error is sent to the loop Filter to obtain the loop control error; send the loop control error to the numerically controlled oscillator, and the numerically controlled oscillator generates the interpolation time and interpolation phase, and sends the interpolation time and interpolation phase to the interpolation filter; the numerically controlled oscillator will generate The interpolation time is sent to the leading bit clock generation module and the lagging bit clock generating module to generate a leading accumulation reset signal and a lagging accumulation reset signal for resetting the leading accumulation module and the lagging accumulation module.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a synchronization method suitable for high code rate frequency modulation signals. Background technique [0002] In the field of projectile and arrow telemetry, the telemetry signal of the frequency modulation system has high reliability and good anti-interference ability, and has been widely used. At present, the rate of the domestic mainstream FM telemetry baseband is between 10Kbps and 20Mbps. In the future, the development trend of telemetry products will mainly develop in the direction of strong adaptability to the environment, high bit rate, efficient spectrum utilization, and product miniaturization, so as to adapt to different launch tasks. [0003] In a common FM signal synchronization scheme, the integration method used in the symbol loop reduces the speed of the oversampled signal to the symbol rate, and improves the signal-to-noise ratio of the signal ...
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IPC IPC(8): H04L7/00H04W56/00
CPCH04L7/0016H04L7/0054H04L7/033H04W56/0055Y02D30/70
Inventor 潘云强徐杰
Owner 北京融为科技有限公司