Circuit for extracting carrier signals

Details Circuit for extracting carrier signals Circuit for extracting carrier signals

H - Electricity

04

L

325/72

H04L 27/22 (2006.01) H04L 27/20 (2006.01) H04L 27/227 (2006.01)

Patent

CA 1273680

ABSTRACT In circuits for reproducing carriers for continuous phase modulation having a rational modulation index these signals are multiplied in a multiplier for producing a harmonic, with unique phases occurring due to phase addition irrespective of the information to be conveyed. This harmonic is selected by means of a bandpass filter and supplied to a divider for reproducing the carrier signal. However, as the desired phases only occur at certain instants the effects of jitter in the reproduced carrier signal is undesirably high. Jitter suppression is considerably improved by supplying to the bandpass filter only the instantaneous values of the virtually desired phases occurring at the specific instants.

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