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US 11,381,439 B2Granted
IBOC compatible superposition modulation by independent modulators utilizing clipping noise from peak-to-average power reduction
AssigneeNautel Limited
InventorPhilipp Schmid
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Abstract
According to an aspect of the present invention, there is provided a method for providing additional bandwidth to receivers that can decode a higher modulation comprising trading a peak-to-average power ratio (PAPR) reduction induced constellation noise of all or a subset of in-band on-channel (IBOC) carriers within an orthogonal frequency division multiplexing (ODFM) waveform with data carrying superposition modulation.
Claims10
A radio transmission method comprising:
- transmitting an orthogonal frequency division multiplexing (OFDM) waveform signal to a plurality of receivers, the modulated signal providing additional bandwidth to new receivers capable of decoding a higher modulation while a main modulation of the OFDM waveform signal complies with established signal quality specifications to be compatible with existing receivers, the transmitted OFDM waveform signal trading a peak-to-average power ratio (PAPR) reduction induced constellation noise of all or a subset of in-band on-channel (IBOC) carriers within the ODFM waveform with data carrying superposition modulation.
Dependencies are inferred from the claim text.