Method and apparatus for reducing the computational complexity and relaxing the critical path of reduced state sequence estimation (RSSE) techniques
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United States of America Patent
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Feb 10, 2004
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app pub date -
Jun 4, 1999
filing date -
Jun 4, 1999
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Abstract
A method and apparatus are disclosed for reducing the complexity of reduced state sequence estimation (RSSE) techniques for a given number of states while also reducing the critical path problem. The intersymbol interference due to the less significant tail taps of the channel impulse response is processed with a lower complexity cancellation algorithm using tentative decisions, while the intersymbol interference due to the more significant initial taps is processed with a more complex cancellation algorithm, such as a reduced state sequence estimation technique or an M-algorithm technique. A receiver is disclosed that includes a circuit for processing intersymbol interference due to the less significant tail taps using tentative decisions and an RSSE circuit for processing the intersymbol interference due to the more significant taps.
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