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Combining digital and analog signals for US IBOC FM broadcasting

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2 Author(s)
Liebe, R.F. ; Howell Labs. Inc., Bridgton, ME, USA ; Surette, R.A.

IBOC DAB (In-Band On-Channel Digital Audio Broadcasting) requires the simultaneous broadcast of an analog and a digital signal within one channel of the FM band. Because broadcasters are adding IBOC to their existing systems, it is vital that they achieve maximum power efficiency while working within their existing space and power limitations. There are currently three different strategies proposed for accomplishing this goal, each having its own advantages and disadvantages. One strategy is to establish a separate, second antenna for the digital service. The other two strategies involve combining the analog and digital signals, either in a single hybrid transmitter or at the output of separate analog and digital transmitters. This paper discusses the equipment required for accomplishing this last strategy.

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Broadcasting, IEEE Transactions on  (Volume:48 ,  Issue: 4 )