Demodulator carrier recovery loop

Details Demodulator carrier recovery loop Demodulator carrier recovery loop

H - Electricity

03

D

329/3

H03D 3/18 (2006.01) H04L 27/227 (2006.01) H04L 27/233 (2006.01) H04L 27/00 (2006.01)

Patent

CA 1162619

B10261 DEMODULATOR CARRIER RECOVERY LOOP ABSTRACT A recovery loop includes an analog circuit that mixes a fixed frequency signal from a temperature controlled oscillator (20) with an IF input to produce product signals corresponding to the quadrature components of data signals with a frequency offset. A digital complex multiplier (32) is responsive to the product signals and to the output of a number controlled oscillator (34) to produce a digital output corresponding to the data signals. The output of the number controlled oscillator (34) is controlled by a digital phase lock loop.

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