Key parameter design and accuracy verification for delay-locked loops in space-based gravitational wave detection

Key Points

• The aim is to enhance distance measurement accuracy in space-based gravitational wave detection using pseudorandom code technology.
• Developed a dual-parameter solution for the discrete autocorrelation function of pseudorandom codes.
• Analyzed the impact of sampling ratio and sampling period on measurement accuracy.
• Used numerical calculations and experimental testing to validate the proposed solution.
• Numerical results confirmed consistency with the defined models.
• Experimental tests showed a distance measurement accuracy better than 1.5 mm at 10 Hz.
• Findings meet the application requirements for the Tianqin space gravitational wave detection plan.