Am stereo broadcasting system

Details Am stereo broadcasting system Am stereo broadcasting system

H - Electricity

04

H

325/37

H04H 5/00 (2006.01)

Patent

CA 1181489

ABSTRACT OF THE DISCLOSURE An AM stereo broadcasting system for transmitting stereo signals in the AM broadcasting band. The system is based on amplitude modulation by two carriers having the same frequency and a 90° phase difference from each other, and is capable of increasing the modulation depth of pilot signals (used for stereo signal identification) irrespective of the stereo signals, so that the pilot signals can be easily detected. By modulating both the sum and difference signals by the pilot signal, the receiver portion of the present system can derive the pilot signal irrespective of the stereo signals, thereby obviating many of the previous AM stereo broadcasting system problems.

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