deramp

de- +‎ ramp

deramp (third-person singular simple present deramps, present participle deramping, simple past and past participle deramped)

1. (transitive) To remove (goods or containers) from a railroad flatcar using special equipment.
2. To use a deramp process in order to clean up an electronic signal.

   a phase deramping function

deramp (plural deramps)

1. 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, 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:

     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, 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).

• damper, ramped