Synchronization method suitable for high-bit-rate frequency modulation signals
A frequency modulation signal, high code rate technology, applied in the direction of synchronization device, synchronization device, synchronization error detection, etc., to achieve high symbol rate, ensure stability, and low complexity
Active Publication Date: 2022-03-01
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 invention provides a synchronization method suitable for a high-bit-rate frequency modulation signal. The synchronization method comprises the following steps: carrying out signal resampling on an input signal through an interpolation filter; carrying out multi-symbol detection (MSD) detection on the resampled signal to obtain an output signal; after cross-product frequency discrimination and automatic gain control (AGC) are carried out on the resampled signal, lead accumulation and lag accumulation are respectively carried out, then timing error calculation is carried out on a lead accumulation value and a lag accumulation value to obtain a timing error, and the timing error is sent to a loop filter to obtain a loop control error; sending the loop control error to a numerical control oscillator, generating an interpolation moment and an interpolation phase by the numerical control oscillator, and sending the interpolation moment and the interpolation phase to an interpolation filter; and the numerical control oscillator sends the generated interpolation time to the lead bit clock generation module and the lag bit clock generation module to generate a lead accumulation reset signal and a lag accumulation reset signal for resetting the lead accumulation module and the lag 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