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Wireless access modem having downstream channel resynchronization method
   
Document Number
US Patent 7120854
Issued Date
October 10, 2006
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Abstract
A resynchronization method for use in a data communication system having a first device configured to transmit data at a symbol rate to a second device. The second device includes a Reed Solomon (RS) decoder having a RS lock indicator and a Moving Picture Experts Group (MPEG) Protocol Interface (MPI) having a MPI lock indicator, wherein the RS and the MPI lock indicators are monitored. Four different states, defined by the values of the RS and MPI lock indicators, determine whether the data communication system will wait for the RS decoder and the MPI hardware block to resynchronize, whether an intermediate-subset of the channel acquisition algorithm is performed or whether the entire channel acquisition algorithm is performed. The method for resynchronization described herein recovers synchronization within a predetermined time without the layers above the physical link layer having knowledge.
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Number of Claims:
6
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Published
October 10, 2006
Application Number
10/643,119
Filed
August 18, 2003
US Classification
714/784   714/789
Int'l Classification
H03M   13/00   (20060101)   H04L   5/16   (20060101)  
Examiner
USPTO Field of Search
714/784   714/789  
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