The technique to measure the frequency very accurately for electronic warfare (EW) applications, and is simple in hardware, and which can accomplish this goal with a signal with real data (in contrast to complex data). It uses trigonometric identities to compute the location of the zero, which is very...http://www.google.es/patents/US5373236?utm_source=gb-gplus-sharePatente US5373236 - Highly accurate zero crossings for frequency determination
Highly accurate zero crossings for frequency determination
