Reception of inter-symbol-correlated signals using symbol-by-symbol soft-output demodulator
First Claim
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1. A receiver comprising:
- sequence estimation circuitry operable to generate first soft bit decisions as to encoded bits corresponding to a received symbol; and
decoder circuitry configured to decode said first soft bit decisions to generate extrinsic bit information regarding said received symbol, whereinsaid sequence estimation circuitry is operable to use said extrinsic information as a priori information for generating second soft bit decision as to said encoded bits corresponding to said received symbol, andsaid sequence estimation circuitry or said decoder circuitry is operable to estimate nonlinear distortion experienced by said received symbol based on levels of said received symbol and adjust said first soft bit decisions based on said estimated nonlinear distortion.
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Abstract
A receiver comprises a sequence estimation circuit and a soft-input-soft-output (SISO) decoder. The sequence estimation circuit comprises circuitry operable to generate first soft bit decisions for symbols of a received inter-symbol-correlated signal. The SISO decoder comprises circuitry operable to decode the first soft bit decisions to generate corrected soft bit decisions. The circuitry of the sequence estimation circuit is operable to generate, based on the corrected soft bit decisions, second soft bit decisions for the symbols of the received inter-symbol-correlated signal, which are improved/refined relative to the first soft bit decisions.
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Citations
15 Claims
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1. A receiver comprising:
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sequence estimation circuitry operable to generate first soft bit decisions as to encoded bits corresponding to a received symbol; and decoder circuitry configured to decode said first soft bit decisions to generate extrinsic bit information regarding said received symbol, wherein said sequence estimation circuitry is operable to use said extrinsic information as a priori information for generating second soft bit decision as to said encoded bits corresponding to said received symbol, and said sequence estimation circuitry or said decoder circuitry is operable to estimate nonlinear distortion experienced by said received symbol based on levels of said received symbol and adjust said first soft bit decisions based on said estimated nonlinear distortion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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generating, by sequence estimation circuitry, first soft bit decisions as to encoded bits corresponding to a received symbol; estimating, by said sequence estimation circuitry, nonlinear distortion experienced by said received symbol based on levels of said received symbol; adjusting, by said sequence estimation circuitry, said first soft bit decisions based on said estimated nonlinear distortion; and decoding, by decoder circuitry, said first soft bit decisions to generate extrinsic bit information regarding said received symbol, wherein said sequence estimation circuitry is operable to use said extrinsic information as a priori information for generating second soft bit decision as to said encoded bits corresponding to said received symbol. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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generating, by sequence estimation circuitry, first soft bit decisions as to encoded bits corresponding to a received symbol; decoding, by decoder circuitry, said first soft bit decisions to generate extrinsic bit information regarding said received symbol, wherein said sequence estimation circuitry is operable to use said extrinsic information as a priori information for generating second soft bit decision as to said encoded bits corresponding to said received symbol; estimating, by said decoder circuitry, nonlinear distortion experienced by said received symbol based on levels of said received symbol; and adjusting, by said decoder circuitry, said first soft bit decisions based on said estimated nonlinear distortion.
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Specification