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High speed computation for new digital VHF and UHF passive radar receiver

We describe a new digital receiver for passive radar observation at HF, VHF, and UHF frequencies, which is free of Nyquist aliasing through 800 MHz. It follows the development of the digital receivers used in the Manastash Ridge Radar, which uses moderate undersampling at 100 MHz, and an analog downconverter for higher frequencies.