Demodulation and decoding
AssigneeNXP B.V.
InventorsSemih Serbetli, Nur Engin, Alessio Filippi
Life of this patent
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Abstract
A receiver for a modulated signal of a communication system is disclosed. The receiver includes a demodulator to demodulate the received modulated symbols of a received signal into received soft-bits. The receiver also includes a hard-decision decoder that is configured to decode the received soft-bits into decoded bits. A feedback loop is included to provide feedback from the hard decision decoder to the demodulator. The feedback loop is configured to re-encode the decoded bits from the hard-decision decoder into re-encoded bits. The demodulator is further configured to iteratively demodulate the received modulated signal using an output of the feedback loop.
Claims15
A receiver for a modulated signal of a communication system, comprising:
- a demodulator arranged and configured to demodulate the received modulated symbols of a received signal into received soft-bits;
- a hard-decision decoder arranged and configured to decode the received soft-bits into decoded bits;
- a feedback loop arranged to provide feedback from the hard decision decoder to the demodulator, the feedback loop being configured to re-encode the decoded bits from the hard-decision decoder into re-encoded bits and to modulate the re-encoded bits into estimated modulated symbols, and wherein the demodulator is further arranged and configured to iteratively demodulate the received modulated signal using an output of the feedback loop.
A method of iteratively demodulating a modulated signal of a communication system, the method comprising:
- demodulating received modulated symbols into soft-bits using a demodulator;
- hard-decision decoding the soft-bits into decoded bits using a hard-decision decoder;
- re-encoding the decoded bits output by the hard-decision decoder into re-encoded bits;
- modulating the re-encoded bits into estimated modulated symbols;
- feeding back the re-encoded bits or the estimated modulated symbols to the demodulator;
- and
- iteratively demodulating the modulated signal using the re-encoded bits or the estimated modulated symbols.
Dependencies are inferred from the claim text.