Circuit for determining transmitter modulation characteristics

US4885586A · kind A · utility

Assignee

• In the United States of America as Represented by the Secretary of the Navy · US

Inventors

• Mervyn C. Hoover · Ridgecrest, US
• Michael Schmitt · Freising, DE

Key dates

• Filing date: Jul 17, 1978
• Grant date: Dec 5, 1989
• Expiry date: Jul 17, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/021
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A radiometer circuit for determining the character of the modulation of a signal received from a radio frequency transmitter. The circuit will determine if the transmission is one of the following classes: continuous wave (CW) frequency modulated CW (FMCW), noise modulated FMCW and noise; or pulse modulated, burt pulse modulated, random pulse modulated, or any pulse modulated noise. A single radio frequency amplifier is used to detect and discriminate between pulsed and CW transmissions.