Adaptive tracking method for receiver in high-dynamic environment

Abstract

The invention discloses an adaptive tracking method for a receiver in a high-dynamic environment. According to the adaptive tracking method, bandwidths of loop filters for a frequency-locked loop, a phase-locked loop and an auxiliary phase-locked loop of the frequency-locked loop are adjusted by detecting the dynamic property and the signal-to-noise property of tracking signals of the receiver in real time, so that optimum values of the bandwidths are kept; meanwhile, a dynamic application range of a tracking loop is widened by adjusting an auxiliary coefficient of the auxiliary phase-locked loop of the frequency-locked loop, so that stability of the tracking loop in the high-dynamic environment is improved. The adaptive tracking method for the receiver in the high-dynamic environment has the advantages that the adaptive tracking method is capable of enabling the receiver to adjust own parameters timely in a dynamic change environment, errors of tracking satellite navigation signals are kept within a small range, and the shortcomings of large tracking errors and proneness to lock loss of the receiver in the prior art are overcome.

Description

technical field [0001] The invention relates to a satellite communication receiver, in particular to an adaptive tracking method in a high dynamic environment of the receiver. Background technique [0002] The Beidou satellite navigation system (hereinafter referred to as BD) is a global satellite navigation system independently constructed and operated by my country, and compatible with other satellite navigation systems in the world. It consists of 5 geostationary orbit (GEO) satellites, 27 medium earth orbit (MEO) satellites and 3 inclined geosynchronous orbit (IGSO) satellites. At present, the Beidou satellite navigation system has successfully launched 16 satellites, forming a regional service capability, providing passive positioning, navigation and timing services for most of my country and surrounding areas. [0003] BD satellite signals have three frequency points: B1, B2 and B3, among which B1 and B2 are two civilian signals. The B1 and B2 signals are formed on t...

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Problems solved by technology

[0007] 1) Although the phase-locked loop has a small carrier tracking error, its dynamic performance is poor, and it is difficult to track the carrier phase in a high dynamic environment, and it is easy to lose lock;

[0008] 2) Although the frequency-locked loop has a large tracking range for dynamic signals, the tracking error is relatively large;

[0009] 3) Although the frequency-locked

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