基于BP-PID控制的载波频率准确度提高算法

doi:10.12305/j.issn.1001-506X.2021.07.21

Abstract

Abstract:

The forwarding satellite navigation system is a new type of satellite navigation structure and system independently researched and developed in China. However, due to the influence of uplink Doppler and satellite transponder, the carrier frequency accuracy order of the system is 10^-8, which cannot reach the accuracy of the carrier frequency of the system. In order to solve this problem, the factors that aggravate the carrier frequency of the forwarding satellite navigation system are analyzed in detail, and the pre-offset of uplink carrier frequency is obtained by measurement and analysis. The uplink carrier frequency is controlled and adjusted in real time by proportion integration differentiation control method based on back propagation neural network. The control adjustment algorithm is simulated and verified, the response time is 50 s and the root mean square error of the control residual is 0.022 Hz. Using the actual satellite observation data, the results show that the carrier frequency accuracy order of the system is improved from 10^-8 to 10^-14, which is suitable for the application of the carrier frequency and carrier phase of the forwarding satellite navigation system.

Key words: forwarding satellite navigation system, frequency adjustment, back propagation neural network, proportion integration differentiation control

CLC Number:

TN927.2

Yu SU, Wenfang JING, Xiaochun LU, Yang ZHANG. Carrier frequency accuracy improvement algorithm based on BP-PID control[J]. Systems Engineering and Electronics, 2021, 43(7): 1894-1903.

Figures/Tables 12

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Carrier frequency accuracy improvement algorithm based on BP-PID control

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