METHOD AND APPARATUS FOR JOINT EQUALIZATION AND DECODING OF MULTIDIMENSIONAL CODES TRANSMITTED OVER MULTIPLE SYMBOL DURATIONS
First Claim
1. A reduced state sequence estimation decoder for a multidimensional code, wherein a multidimensional code symbol comprises a number of symbol components of lower dimensionality, comprising:
- at least one branch metric unit that calculates branch metrics for a received signal based on intersymbol interference and intrasymbol interference estimates, said at least one branch metric unit compensating for intrasymbol interference caused by symbol components within a current multidimensional code symbol; and
a decision feedback unit that processes survivor symbols to calculate the intersymbol interference estimates for different code states of said multidimensional code and channels used to transmit said multidimensional code.
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Abstract
Techniques are provided for performing joint equalization and decoding of multidimensional codes transmitted over multiple symbol durations. A reduced state sequence estimation (RSSE) decoder is provided for a multidimensional code. A multidimensional code symbol comprises a number of symbol components of lower dimensionality. The RSSE decodes comprises at least one branch metric unit that calculates branch metrics for a received signal based on intersymbol interference and intrasymbol interference estimates, the at least one branch metric unit compensating for intrasymbol interference caused by symbol components within a current multidimensional code symbol; and a decision feedback unit that processes survivor symbols to calculate the intersymbol interference estimates for different code states of the multidimensional code and channels used to transmit the multidimensional code.
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Citations
20 Claims
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1. A reduced state sequence estimation decoder for a multidimensional code, wherein a multidimensional code symbol comprises a number of symbol components of lower dimensionality, comprising:
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at least one branch metric unit that calculates branch metrics for a received signal based on intersymbol interference and intrasymbol interference estimates, said at least one branch metric unit compensating for intrasymbol interference caused by symbol components within a current multidimensional code symbol; and a decision feedback unit that processes survivor symbols to calculate the intersymbol interference estimates for different code states of said multidimensional code and channels used to transmit said multidimensional code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 18, 19, 20)
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- 8. The reduced state sequence estimation decoder of claim I, wherein said at least one branch metric unit is further operative to calculate a metric for an initial symbol component using survivor symbols from a corresponding state to account for intersymbol interference, wherein said metric is used for the calculation of a branch metric.
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11. A method for processing a multidimensional code, wherein a multidimensional code symbol comprises a number of symbol components of lower dimensionality, comprising:
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calculating branch metrics for a received signal based on intersymbol interference and intrasymbol interference estimates, wherein said calculated branch metrics compensate for intrasymbol interference caused by symbol components within a current multidimensional code symbol; and processing survivor symbols to calculate the intersymbol interference estimates for different code states of said multidimensional code and channels used to transmit said multidimensional code. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification