Forward error correction coding scheme for hybrid AM in-band on-channel digital audio broadcasting system

摘要

PROBLEM TO BE SOLVED: To provide a broadcasting method, transmitter and receiver utilizing an AM compatible digital audio broadcast signal.;SOLUTION: An AM compatible digital audio broadcasting signal comprises an analog modulated carrier signal centrally positioned in a radio channel, wherein the analog modulated carrier signal is modulated by an analog signal, and a plurality of digitally modulated subcarrier signals in the radio channel, wherein the digitally modulated subcarrier signals are modulated using complementary pattern-mapped trellis code modulation including a code mapped to overlapping partitions. Time diversity can be included between the analog modulated carrier signal and the plurality of digitally modulated subcarrier signals, and/or between groups of digitally modulated subcarrier signals.;COPYRIGHT: (C)2005,JPO&NCIPI