Digital audio broadcasting method and apparatus using complementary pattern-mapped convolutional codes
AssigneeiBiquity Digital Corporation
InventorBrian William Kroeger
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Abstract
A method of transmitting digital information comprises the steps of forward error correction encoding a plurality of bits of digital information using complementary pattern-mapped convolutional codes, modulating a plurality of carrier signals with the forward error corrected bits, and transmitting the carrier signals. The modulation can include the step of independently amplitude shift keying in-phase and quadrature components of the QAM constellation using Gray code constellation points corresponding to amplitude levels. Transmitters that transmit signals in accordance with the method and receivers that receive such signals are also included.
Claims25
A method of transmitting digital information comprising the steps of:
- forward error correction encoding a plurality of bits of digital information using complementary pattern-mapped convolutional codes;
- modulating a plurality of carrier signals with the forward error corrected bits;
- and
- transmitting the carrier signals.
A transmitter comprising:
- means for forward error correction encoding a plurality of bits of digital information using complementary pattern-mapped convolutional codes;
- means for modulating a plurality of carrier signals with the forward error corrected bits;
- and
- means for transmitting the carrier signals.
A method of receiving an information signal comprising the steps of:
- receiving a plurality of carrier signals modulated by a plurality of complementary pattern-mapped convolutional coded bits;
- demodulating the carrier signals to recover the complementary pattern-mapped convolutional coded bits;
- and
- producing an output signal based on the complementary pattern-mapped convolutional coded bits.
A receiver for receiving an information signal comprising:
- means for receiving a plurality of carrier signals modulated by a plurality of complementary pattern-mapped convolutional coded bits;
- means for demodulating the carrier signals to recover the complementary pattern-mapped convolutional coded bits;
- and
- means for producing an output signal based on the complementary pattern-mapped convolutional coded bits.
A transmitter comprising:
- an encoder for forward error correction encoding a plurality of bits of digital information using complementary pattern-mapped convolutional codes;
- a modulator for modulating a plurality of carrier signals with the forward error corrected bits;
- and
- an antenna for transmitting the carrier signals.
A receiver for receiving an information signal comprising:
- an antenna for receiving a plurality of carrier signals modulated by a plurality of complementary pattern-mapped convolutional coded bits;
- a demodulator for demodulating the carrier signals to recover the complementary pattern-mapped convolutional coded bits;
- and
- an output for producing an output signal based on the complementary pattern-mapped convolutional coded bits.
Dependencies are inferred from the claim text.