The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2019
Filed:
Oct. 26, 2016
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Jeffrey M. Yang, Signal Hill, CA (US);
Pei-Lan Hsu, Lakewood, CA (US);
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Abstract
A wideband simultaneous transmit and receive (STAR) subsystem for a radar or other two-way system. The STAR subsystem includes a canceller circuit which digitally prepares a cancellation signal to cancel out leaked or reflected portions of the transmit signal and correlated noise in the receiver signal. The STAR subsystem also performs a final cancellation of temperature-dependent or 'thermal' transmit-signal noise in the receiver signal. Together, the combined cancellation techniques prevent receiver saturation and preserve receiver sensitivity. The digital cancellation can be adapted in a closed-loop mode to adjust time delays and amplitudes of cancellation signal components. The cancellation system is run open loop in real time to minimize bandwidth limitations and achieve wideband performance. The STAR subsystem can be implemented with discrete components, as a system-on-chip, or as any combination thereof.