ISARLAB - Inverse Synthetic Aperture Radar Simulation - Defence ...

DSTO-GD-0210• Effective bandwidth (Hz);• Pulse width (seconds);• Effective pulse repetition frequency (Hz);• Sampling frequency (Hz);• Number of frequency samples per burst;• Number of bursts per ISAR image; and• Signal to noise ratio (dB).Parameters for a chirp waveform are:• Centre frequency (Hz);• Chirp bandwidth (Hz);• Pulse duration (seconds);• Pulse repetition frequency (Hz);• A/D sampling frequency (Hz);• Number of A/D samples per pulse;• Number of pulses per ISAR image; and• Signal to noise ratio (dB).Note that in Trial mode the signal to noise ratio is undefined and therefore not used.Our implementation employs an enumerated data type called Radar Waveform thatgives the context in which to interpret the Signal Waveform array for differentwaveforms. The parameters in this array are listed below and are interpreted as thecorresponding parameters above.• Radar Waveform type;• Centre frequency (stored as Hz, entered as GHz);• Frequency bandwidth (stored as Hz, entered as MHz);• Pulse width or duration (stored as seconds, entered as microseconds);• Pulse or burst repetition frequency (Hz);• Sampling frequency (stored as Hz, entered as kHz);• Number of samples per pulse/burst;• Number of pulses/bursts per image; and• Signal to noise ratio (dB).14