Carrier tracking method and system supporting high dynamic

Abstract

The invention relates to a carrier tracking method and system supporting high dynamic. The method comprises the following steps: processing a received digital intermediate frequency signal to generatean in-phase baseband signal and an orthogonal baseband signal; processing the in-phase baseband signal to obtain a despread in-phase signal, and processing the orthogonal baseband signal to obtain adespread orthogonal signal; processing the de-spread in-phase signal to obtain an accumulated in-phase signal, and processing the de-spread orthogonal signal to obtain an accumulated orthogonal signal; identifying the accumulated in-phase signal and the accumulated orthogonal signal to obtain a frequency difference and a phase difference; taking the frequency difference and the phase difference asobserved quantities of a Kalman filter, establishing a state equation and an observation equation of the phase and the frequency, and estimating the phase difference and the frequency difference; andfeeding back the output of the Kalman filter to the local carrier generator through the loop filter so as to adjust the local oscillator to have the same frequency and phase with the received signal.The method is beneficial to improving the system stability.

Description

technical field

[0001] The present invention relates to the technical field of wireless communication, in particular to a carrier tracking method and system supporting high dynamics. Background technique

[0002] With the official opening of the Beidou-3 global satellite navigation system, satellites have once again become a popular hotspot. In fact, in recent years, not only the navigation fields such as Beidou and GPS have developed greatly, but also the field of satellite data transmission has developed rapidly. Here, the more demanding part is the communication between the satellite and the ground station, and the data rate can reach 20Gbps in some cases. At the same time, non-stationary satellites are moving at high speed. In some cases, there is a large relative speed, acceleration and even jerk between the satellite and the ground station.

[0003] In the case of the above-mentioned satellite moving at high speed, the satellite signal received by the ground station ...

Examples

Embodiment 1

[0025] Such as figure 1 As shown, this embodiment provides a carrier tracking method supporting high dynamics, including: step S1: process the received digital intermediate frequency signal to generate an in-phase baseband signal and a quadrature baseband signal; step S2: process the in-phase Processing the baseband signal to obtain the in-phase signal after despreading, and processing the orthogonal baseband signal to obtain the orthogonal signal after despreading; Step S3: processing the in-phase signal after despreading to obtain the accumulated in-phase Signal, the quadrature signal after despreading is processed to obtain the quadrature signal of accumulation; Step S4: Discriminate the in-phase signal and the quadrature signal of accumulation to obtain frequency difference and phase difference; Step S5: The The frequency difference and the phase difference are used as the observations of the Kalman filter, the state equation and the observation equation of the phase and f...

Embodiment 2

[0077] Based on the same inventive concept, this embodiment provides a carrier tracking system supporting high dynamics, and its problem-solving principle is similar to that of the carrier tracking method supporting high dynamics, and repeated descriptions will not be repeated.

[0078] The carrier tracking system supporting high dynamics described in this embodiment includes:

[0079] The first processing module is used to process the received digital intermediate frequency signal to generate an in-phase baseband signal and a quadrature baseband signal;

[0080] The second processing module is configured to process the in-phase baseband signal to obtain a despread in-phase signal, and process the quadrature baseband signal to obtain a despread quadrature signal;

[0081] The third processing module is configured to process the despread in-phase signal to obtain an accumulated in-phase signal, and process the despread quadrature signal to obtain an accumulated quadrature signa...

technical field

[0001] The present invention relates to the technical field of wireless communication, in particular to a carrier tracking method and system supporting high dynamics. Background technique

[0002] With the official opening of the Beidou-3 global satellite navigation system, satellites have once again become a popular hotspot. In fact, in recent years, not only the navigation fields such as Beidou and GPS have developed greatly, but also the field of satellite data transmission has developed rapidly. Here, the more demanding part is the communication between the satellite and the ground station, and the data rate can reach 20Gbps in some cases. At the same time, non-stationary satellites are moving at high speed. In some cases, there is a large relative speed, acceleration and even jerk between the satellite and the ground station.

[0003] In the case of the above-mentioned satellite moving at high speed, the satellite signal received by the ground station ...

Examples

Embodiment 1

[0025] Such as figure 1 As shown, this embodiment provides a carrier tracking method supporting high dynamics, including: step S1: process the received digital intermediate frequency signal to generate an in-phase baseband signal and a quadrature baseband signal; step S2: process the in-phase Processing the baseband signal to obtain the in-phase signal after despreading, and processing the orthogonal baseband signal to obtain the orthogonal signal after despreading; Step S3: processing the in-phase signal after despreading to obtain the accumulated in-phase Signal, the quadrature signal after despreading is processed to obtain the quadrature signal of accumulation; Step S4: Discriminate the in-phase signal and the quadrature signal of accumulation to obtain frequency difference and phase difference; Step S5: The The frequency difference and the phase difference are used as the observations of the Kalman filter, the state equation and the observation equation of the phase and f...

Embodiment 2

[0077] Based on the same inventive concept, this embodiment provides a carrier tracking system supporting high dynamics, and its problem-solving principle is similar to that of the carrier tracking method supporting high dynamics, and repeated descriptions will not be repeated.

[0078] The carrier tracking system supporting high dynamics described in this embodiment includes:

[0079] The first processing module is used to process the received digital intermediate frequency signal to generate an in-phase baseband signal and a quadrature baseband signal;

[0080] The second processing module is configured to process the in-phase baseband signal to obtain a despread in-phase signal, and process the quadrature baseband signal to obtain a despread quadrature signal;

[0081] The third processing module is configured to process the despread in-phase signal to obtain an accumulated in-phase signal, and process the despread quadrature signal to obtain an accumulated quadrature signa...

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