Single-channel single-pulse angle tracking method based on digital signal reconstruction

Abstract

The invention discloses a single-channel single-pulse angle tracking method based on digital signal reconstruction, and belongs to the technical field of space communication. According to the invention, discontinuous signals on time can be recovered to continuous signals with continuous phases on time. On the basis, a microwave switch is used for replacing a modulation and sum circuit module in a traditional single-channel single-pulse technology, sum and difference signals are alternately gated in a time-sharing mode by controlling the microwave switch, and the sum and difference signals are converted into digital signals after being amplified, down-converted and filtered. In a digital domain, continuous in-phase and orthogonal signals are recovered from intermittent sum signals by adopting the signal reconstruction method disclosed by the invention, and relative amplitude and phase of difference signals are extracted by taking the reconstructed in-phase and orthogonal signals as a reference, so that estimation of target angle information is realized.

Description

technical field [0001] The invention relates to a single-channel single-pulse angle tracking method based on digital signal reconstruction, which belongs to the technical field of space communication. Background technique [0002] Inter-satellite / satellite-ground single-channel single-pulse beam pointing and tracking technology is widely used in the field of satellite-to-satellite and inter-satellite communications. Its main function is to receive the radio frequency signal emitted by the target antenna and form a sum and difference beam. The amplitude and phase calculate the angular position deviation of the electrical axis of the main body antenna from the electrical axis of the target antenna, and use the deviation signal to drive the servo to control the movement of the satellite antenna of the main body, and finally realize the pointing alignment of the target antenna beam and establish a stable satellite / ground / Intersatellite communication link. [0003] The key diff...

AI Technical Summary

Problems solved by technology

This method needs to phase modulate the difference signal and synthesize it with the sum signal, and has high requirements for phase modulation and phase change consistency of the combiner in the full temperature range, especially at the V end or even higher THz frequency bands. It is often impossible to guarantee the phase characteristics of the sum and difference channels in the full temperature range

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