Sweeping Noise Blanker.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A noise rejection circuit for a communications receiver in which the input to the receiver is continually sampled by a sweeping heterodyne oscillator to develop a difference frequency noise signal which represents the input noise over a wide frequency band. The receiver input is also processed by a conventional heterodyne oscillator to develop an output at an intermediate frequency that is comprised of the desired signal plus the noise component. Further processing of both the swept heterodyne oscillator and the normal heterodyne oscillator outputs in a differential combiner serves to remove the noise from the desired data signal. Author