Title :
Radar/sonar acceleration estimation with linear-period modulated waveforms
Author :
Altes, Richard A.
Author_Institution :
Chirp Corp., La Jolla, CA, USA
fDate :
11/1/1990 12:00:00 AM
Abstract :
Doppler and acceleration tolerance of wideband LPM/HFM (linear period-modulated, hyperbolic frequency-modulated) and linear frequency-modulated (FM) signals are compared. A bank of filters matched to frequency-shifted versions of a wideband LPM/HFM transmission system yields a joint maximum likelihood estimate of range and acceleration and avoids acceleration-induced degradation in detection performance. Analytical and neurophysiological results suggest that such processing can be used in bat echolocation for detection and classification of insect wing motion since wideband LFM waveforms are much less Doppler-tolerant than HFM waveforms but have greater acceleration tolerance
Keywords :
biological techniques and instruments; estimation theory; frequency modulation; neurophysiology; radar applications; radar theory; signal detection; sonar; acceleration tolerance; acceleration-induced degradation; bank of filters; bat echolocation; classification of insect wing motion; detection performance; frequency-shifted versions; hyperbolic FM signals; joint maximum likelihood estimate; linear FM signals; linear-period modulated waveforms; neurophysiology; signal detection; wideband LFM waveforms; wideband LPM/HFM transmission system; Acceleration; Doppler radar; Filter bank; Frequency estimation; Frequency modulation; Matched filters; Maximum likelihood detection; Maximum likelihood estimation; Sonar; Wideband;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
