Pulse Detection In Acousto-Optic Channelized Receivers

Brian M. Sadler; Stephen B. Balakirsky; Daniel McCarthy

doi:10.1117/12.960552

14 August 1989 Pulse Detection In Acousto-Optic Channelized Receivers

Brian M. Sadler, Stephen B. Balakirsky, Daniel McCarthy

Author Affiliations +

Proceedings Volume 1102, Optical Technology for Microwave Applications IV; (1989) https://doi.org/10.1117/12.960552
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The large time-bandwidth products of acousto-optic spectrum analyzers require dedicated post-processing hardware for real-time signal parameter estimation with low false alarm rates. Parameters of interest include center frequency, time-of-arrival, time-of-departure, and amplitude. Maximum likelihood parameter estimation can be performed with a spectrogram correlation process, which is a 2-d matched filter operating on the time-frequency history of the spectrum analyzer. The filter is matched to the known covariance of the signal. A data collection board was constructed to allow capture of 256 channels at a readout rate of up to 15 μS. This data was used to examine sub-optimal implementations of the 2-d matched filter. A high-accuracy 2-d peak detection algorithm was developed to assess the filter performance. Experimental results are presented, and design tradeoffs are shown to exist between filter complexity and accuracy of parameter estimation.

Citation Download Citation

Brian M. Sadler, Stephen B. Balakirsky, and Daniel McCarthy "Pulse Detection In Acousto-Optic Channelized Receivers", Proc. SPIE 1102, Optical Technology for Microwave Applications IV, (14 August 1989); https://doi.org/10.1117/12.960552

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