US Patent No. 9,746,545

MONOPULSE ARBITRARY PHASE DETECTION AND REMOVAL


Patent No. 9,746,545
Issue Date August 29, 2017
Title Monopulse Arbitrary Phase Detection And Removal
Inventorship Sy Prestwich, Riverton, UT (US)
Jeffrey B Bench, Lehi, UT (US)
Richard A McNamee, Salt Lake City, UT (US)
Scott M. Lyon, South Weber, UT (US)
Assignee L3 Technologies, Inc., New York, NY (US)

Claim of US Patent No. 9,746,545

1. A method for an arbitrary phase detector to detect and remove an arbitrary phase difference between a sum channel signal
and a difference channel signal, the method comprising:
an act of the arbitrary phase detector receiving a sum channel signal from a sum channel signal source;
an act of the arbitrary phase detector receiving a difference channel signal from a difference channel signal source;
an act of the arbitrary phase detector shifting the difference channel signal according to a plurality of potential phase
difference pairs ?i and ?i+? between the sum and difference channel signal to thereby generate a plurality of difference channel signals each having
a different phase, wherein the plurality of potential phase difference pairs are virtual phase differences generated by the
arbitrary phase detector based on potential phase differences that may be present in the arbitrary phase detector;

an act of the arbitrary phase detector correlating the plurality of difference channel signals each having a different phase
with the sum channel signal to generate a plurality of sum+difference signals and sum?difference signals;

an act of the arbitrary phase detector determining, based on the plurality of sum+difference signals and sum?difference signals,
a maximum correlation magnitude difference between the ?i and ?i+? pairs; and

an act of the arbitrary phase detector using the maximum correlation magnitude differences between the ?i and ?i+? pairs in an error estimate calculation that removes the arbitrary phase difference.