Laser Doppler velocimeter signal processing using sampling spectrum analysis

Abstract

A new technique for processing laser Doppler velocimeter signals by sampling spectrum analysis is presented. A swept-filter spectrum analyzer and pulse-shaping and sample-and-hold circuits are employed. Sampling turbulence frequencies up to 4 kHz. In contrast to most tracking techniques, high dropout of signal cases and high frequency signals normally associated with directionally sensitive velocimeter systems can be processed.