Ranging tone processing method in side-tone ranging based on FPGA

Abstract

The invention discloses a ranging tone processing method in side-tone ranging based on FPGA, and belongs to the field of electronic test and measurement. The ranging tone processing method in side-tone ranging based on FPGA mainly employs an FPGA to complete generation of ranging tone, reception of ranging tone and calculation of the phase difference between emission and reception tones. The ranging tone processing method in side-tone ranging based on FPGA utilizes the double-channel ranging tone processing technology, and uses the emission channel and the reception channel in which the primary tone and the secondary tone with the 2MSPS low sampling rate work at the same time in the capturing stage, thus being able to solve the problem that the FPGA resource is hard to satisfy when the Hzlevel low frequency original tone is recovered and being able to guarantee that no phase fuzzy is generated for capturing of a high-velocity moving satellite. In the tracking stage, the ranging tone processing method in side-tone ranging based on FPGA utilizes the primary tone emission channel and reception channel with the 100MSPS high sampling rate, so that the measuring accuracy of single timecan achieve 10ns and the tracking rate and the measuring accuracy can be improved. The ranging tone processing method in side-tone ranging based on FPGA utilizes the phase difference testing method with average cycle to generate a phase difference, thus reducing the complexity of calculating the phase difference between two single audios. The ranging tone processing method in side-tone ranging based on FPGA utilizes is suitable for implementation of all the side-tone ranging standards, thus being wide in the application range.

Description

technical field [0001] The invention belongs to the field of electronic test and measurement, in particular to a method for processing ranging sounds in FPGA-based side tone ranging. Background technique [0002] At present, the side-tone ranging method and the pseudo-code ranging method are the two most commonly used ranging methods when measuring the distance between satellites and spacecraft on the ground. Among them, the side-tone ranging method has fast measurement speed and high test accuracy. , The required signal bandwidth is narrow, etc., and it is widely used in ranging. In the side tone ranging method, there are multiple ranging standards, including INMARSAT, ESA, ESA-like, etc. These ranging standards are based on the ranging sound for distance calculation, just for different measurement distances or In the application of testing speed, the frequency and number of ranging audio used are different. The side tone ranging method is to send the ranging tone at the ...

AI Technical Summary

Problems solved by technology

[0006] Existing side tone ranging methods based on FPGA are mainly realized by low sampling rate ranging sound or adopting different ways of processing primary and secondary sounds at the capture stage. These two methods are relatively simple and easy to implement in FPGA. However, there is a problem that the single-time ranging accuracy is not high. When the measurement accuracy needs to be improved, only a long-term average method can be adopted, resulting in too long measurement time, poor real-time performance when tracking and measuring the distance of high-speed satellites, and the difference between the main sound and the secondary sound. Simultaneous transmission is prone to problems such as phase ambiguity in the capture phase

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