title: Burst digital correlator as laser-Doppler velocimetry signal processor.
abstract: A burst digital correlator (BDC) has been developed to obtain flow-velocity information at high data rates from wideband laser-Doppler signals of low signal-to-noise ratio (below 0 dB). Results with artificial signals show that, over a signal bandwidth of 5-120 MHz, the BDC has a measurement accuracy of less than 0.4% at a maximum data rate (number of measurements per second) of 208 kHz when 64 signal samples are correlated. The accuracy is better than 0.05% with a sample size of 512. The performance of the BDC was also evaluated in practical measurements of near-wall and strongly oscillatory recirculating flows.
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeda
authors.forename: T
authors.initials: T
authors.lastname: Nakajima