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AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsStephen C. Tyler, Nathaniel W. Rowe, Gerard F. Wohlrab, III
Estimating the term…
Apparatus and method for performing low cost analog clock recovery within a high bandwidth radio frequency communications system. An analog data source is passed through a squaring loop typically utilized for carrier recovery. A squaring loop consists of an analog mixer to multiply one component of the complex signal with itself, a bandpass filter and phase lock loop. The addition of nonlinear gain compression enables clock recovery for higher order modulation schemes to exploit the fundamental phase differences of the individual components that construct the received signal. The output of the phase lock loop drives the Analog-to-Digital converter. It is desired that this signal converges to the symbol clock's frequency and phase of the transmitter, thereby sampling the received baseband signal at the desired symbol levels.
A circuit apparatus for communications signal clock recovery, comprising:
Dependencies are inferred from the claim text.