Search Results - Yunqing Liu
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Initial Pointing Technology of Line of Sight and its Experimental Testing in Dynamic Laser Communication System
Published 2019-01-01Get full textThe initial pointing unit of the line of sight (LOS) operating in the open-loop mode is an important part of the space laser communication system, which directly determines the size of the field of uncertainty (FOU) and the length of the scan time. In this paper, the composition and working principl...
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Reconstruction and Separation Method of Ranging and Communication Phase in Beat-Note for Micro-Radian Phasemeter
Published 2025-06-01Get full textThe primary measurement involves detecting tiny (picometer-level) pathlength fluctuations between satellites using heterodyne laser interferometry for space-based gravitational wave detection. The interference of two laser beams with a MHz-level frequency difference produces a MHz beat-note, in whic...
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Development and Verification of Sampling Timing Jitter Noise Suppression System for Phasemeter
Published 2025-06-01Get full textAs the primary electronic payload of laser interferometry system for space gravitational wave detection, the core function of the phasemeter is ultra-high precision phase measurement. According to the principle of laser heterodyne interferometry and the requirement of 1 pm ranging accuracy of the ph...
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Research on Space-Based Gravitational Wave Signal Denoising Based on Improved VMD with Parrot Algorithm
Published 2025-06-01Get full textGravitational wave (GW) signals are often affected by noise interference in the detection system; in order to attenuate the impact of detector noise and enhance the waveform characteristics of the signal, this paper proposes a space-based GW signal denoising method that combines the Parrot algorithm...
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