Dual-pilot frequency carrier resetting device for aviation wireless communication
A carrier recovery and wireless communication technology, applied in multi-carrier systems, space transmit diversity, diversity/multi-antenna systems, etc., can solve problems such as difficult dynamic capabilities and steady-state performance, inability to achieve carrier recovery, and signal spectrum valleys, etc., to achieve Carrier tracking accuracy is high, reliability is improved, and resources are optimized
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[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0049] The present invention adopts a segmented strategy to design coarse and fine two-stage carrier recovery. Through coarse carrier recovery, use the FFT frequency offset calibration algorithm to quickly capture the carrier frequency offset range of the received signal, and control and reduce the carrier frequency offset of the signal; through fine carrier recovery, use frequency-locked phase-locked loop technology to complete the coarse carrier Compensation of the remaining carrier frequency offset and tracking of the phase offset caused by the limitation of recovery accuracy improves the real-time performance and effectiveness of carrier recovery. At the same time, in order to improve the stability and reliability of system carrier recovery under multipath signal interference, a dual-pilot information carrier recovery strategy is adopted, ...
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