Improved MTI Radar Signal Processor
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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A new type of radar digital signal processor for use with ASR radars is described. It features spectral processing accomplished by combining a 3- pulse canceller with an 8-point, weighted, discrete Fourier transform and adaptive thresholds. This combination of circuits provides a 20-dB increase in MTI improvement factor over present ASRs and is within 2 dB of optimum processing results. An auxiliary channel is provided to allow detection of any target traveling tangentially if its return exceeds the level of ground clutter return in the occupied rangeazimuth cell. The spectral processing technique provides discrimination against weather clutter if the returns from weather and from the target fall into different Doppler frequency regions. The output from this equipment is digital hit reports for transmittal to the ARTS-III IOP computer.
- Air Navigation and Guidance
- Active and Passive Radar Detection and Equipment