de- + ramp
deramp (third-person singular simple present deramps, present participle deramping, simple past and past participle deramped)
- (transitive) To remove (goods or containers) from a railroad flatcar using special equipment.
- To use a deramp process in order to clean up an electronic signal.
- a phase deramping function
deramp (plural deramps)
- A process for cleaning up electronic signals such as radar, in which a received signal is mixed with a reference signal in order to highlight differences in frequencies.
2001, Philippe Lacomme, Air and Spaceborne Radar Systems: An Introduction, ISBN 0852969813, page 223:
- In the deramp process, the principle of continuous radar with a linearly frequency-modulated wave is applied to a pulsed radar.
2003, Ronald G. Driggers, Encyclopedia of Optical Engineering, ISBN 0824742524:
- Deramp processing entails mixing (i.e., multiplying) the return signal with two sinusoidal carriers of frequency fc and then low-pass-filtering the two resulting signals.
2012, Robin A. Vaughan, Microwave Remote Sensing for Oceanographic and Marine Weather-Forecast Models, ISBN 9400905092, page 54:
- The trick with full deramp processing is to mix the echo with a replica of the transmitted chirp signal rather than with a fixed frequency tone (figure 4).