A phase correction system to improve the quality of a wideband chirp signal
Abstract
A phase correction circuit which significantly improves the linearity of a wideband (hundreds of MHz) chirp signal has been constructed and tested. This correction circuit is applicable to a chirp generator in which a digital system is used to compute the phase of the chirp signal once each clock cycle, and the chirp signal bandwidth is then restricted to appreciably less than the clock frequency; analog frequency multiplication is then used to obtain the required bandwidth. The circuit described here corrects the high frequency phase errors which are present after the multiplication process.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 February 1980
 Bibcode:
 1980STIN...8029569L
 Keywords:

 Chirp Signals;
 Circuits;
 Error Correcting Devices;
 Phase Error;
 Frequency Discriminators;
 Frequency Multipliers;
 Sidelobes;
 Communications and Radar