A Novel Receiver Architecture for the Mitigation of the Impact of Pulse Interference from the Command Destruct Subsystem of the USAF Space Lift Range System

Issue
 Date
Publication Date
Patent No.
8,638,890
Category
Method or Process

A receiver may comprise a complex mixer for converting the modulated signal to a complex modulated signal comprising a first in-phase component and a first quadrature component. The receiver may further comprise a digital demodulator. The digital demodulator may comprise at least one processor circuit programmed for applying a phase differencer for generating an output function in terms of a phase difference of the complex modulated signal. Applying the phase differencer may comprise converting the first in-phase component to a function of a phase difference of the first in-phase component expressed in digital time, and converting the first quadrature component to a function of the phase difference of the first quadrature component expressed in digital time. The at least one processor circuit of the digital demodulator may also be programmed for applying a four quadrant inverse tangent to the output function to generate the information signal.

Keywords: receiver, architecture, frequency modulation, signal processing
International Class: H03D1/04