Interface and post-processing requirements to insert an acousto-optic range-Doppler processor into an advanced radar digital signal processor

Rodney A. Durrett; R. Dean; Daniel F. McCarthy; Edward A. Viveiros; Willie Caraway

doi:10.1117/12.212039

16 June 1995 Interface and post-processing requirements to insert an acousto-optic range-Doppler processor into an advanced radar digital signal processor

Rodney A. Durrett, R. Dean, Daniel F. McCarthy, Edward A. Viveiros, Willie Caraway

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Proceedings Volume 2489, Transition of Optical Processors into Systems 1995; (1995) https://doi.org/10.1117/12.212039
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The interfacing and post-processing requirements for the development and insertion of an acousto-optic (AO), range-Doppler processor will be described. This system has been configured to operate as an integral part of the signal processing chain of an advanced spread- spectrum radar developed by the US Army Missile Command (MICOM). This MICOM radar transmits a continuous repeated, biphase-coded waveform and processes a block of received data to detect and track targets i range and Doppler in the presence of severe ground clutter. Multiple code rates are processed to extend the range window through application of residue number techniques. Range and Doppler processing are achieved in the AO processor using an additive triple-product processor architecture that coherently detects the range-Doppler information on a high-speed, custom 3D CCD detector array developed by the Army Research Laboratory. We present the interfaces to the radar and the post-processing of the data produced by the AO range-Doppler processor into the format required by the MICOM signal processor. The interfaces comprise the extraction of digital in-phase and quadrature data, the condition of this data for the AO range-Doppler processor, and the insertion of the post- processed optical data into the radar signal processor. Timing and latency issues are critical to real-time operation (creating range-Doppler images at approximately 1600 Hz frames rates) within the MICOM radar. The post-processing section cover optical processor architecture/post-processing tradeoffs, focusing on requirements, algorithms, and hardware implementation.

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Rodney A. Durrett, R. Dean, Daniel F. McCarthy, Edward A. Viveiros, and Willie Caraway "Interface and post-processing requirements to insert an acousto-optic range-Doppler processor into an advanced radar digital signal processor", Proc. SPIE 2489, Transition of Optical Processors into Systems 1995, (16 June 1995); https://doi.org/10.1117/12.212039

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KEYWORDS

Signal processing

Radar

Image processing

Radar signal processing

Charge-coupled devices

Clocks

Interfaces

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