Method for adaptively tracking broadband receiving signal loop parameters

Abstract

The invention provides a method for adaptively tracking broadband receiving signal loop parameters, and aims to provide a method which is high in operation speed, small in synchronization error and capable of effectively performing adaptive tracking on broadband signals. The method is realized through the following technical scheme: in a built-in digital signal processing module of a programmablegate array chip FPGA, aiming at loop parameters under different modulation mode order accelerations, a loop parameter lookup table is constructed, and the loop parameter lookup table is stored in theFPGA in a list form; in a satellite tracking process, the digital signal processing module demodulates an input digital modulation signal to be judged, a loop parameter value corresponding to the corresponding second-order acceleration value is found in a loop parameter lookup table, and the obtained most similar second-order acceleration value is compared with a loop parameter lookup table set threshold value, the difference value is compared with a threshold value to select an appropriate loop parameter, the loop parameter under the second-order acceleration when the modulation mode is noiseless is determined, and the parameter is adjusted to obtain a real-time adjustment tracking loop parameter.

Description

technical field [0001] The invention relates to broadband satellite communication and wireless communication, and provides a method for adaptively tracking parameters of a broadband receiving signal loop for a high-speed wireless data transmission system. Background technique [0002] High-speed data transmission technology has been highly valued in the fields of aerospace measurement and control, remote sensing, satellite communication, etc., and has developed extremely fast in recent years, and the market demand is also constantly improving; hyperspectral images, SAR images, and multi-instrument platform data are future needs. The main object of high-speed transmission link. With the rapid development of the aerospace industry, the data transmission business has further increased, and the requirements for real-time transmission rates from satellites to the ground are getting higher and higher. Real-time transmission of various remote sensing image data through satellites r...

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Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and propose a method with fast calculation speed, small synchronization error, small phase jitter, short synchronization establishment time and long maintenance time, which can solve the problem of self-adaptive tracking and setting specific tasks at the beginning of the task. The contradiction between the loop parameters and the method of adaptively tracking wideband signals effectively

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