Digital picture code transmission by carrier phase modulation in AM radio transmitter

A novel system for concurrently transmitting audio signals and digital codes from an AM radio station to each receiver is presented. Experiments for sending a still picture from the AM radio station to the receiver have been carried out to check whether the present system is satisfactory. Digital codecs were transmitted at a baud rate of 300 b/s with 2- phi to 4- phi phase-shift keying, and the bit and block error rates were on the order of a few percent.<
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