Patent Number: 6,310,896

Title: System and method for data sequence correlation in the time domain

Abstract: A system and method are disclosed for synchronizing a predetermined repeated data sequence contained in a first data signal at a first sample rate with the same predetermined repeated data sequence contained in a second data signal at a second sample rate in a data communications device. The system preferably includes a digital signal processor operating pursuant to logic stored on a memory. The logic includes synchronization logic which reduces the first sample rate to a predetermined correlation sample rate using a first decimator, resulting in a first reduced data signal. The synchronization logic also reduces the second sample rate to the same predetermined correlation sample rate using a second decimator, resulting in a second reduced data signal. Finally, the synchronization logic determines a sequence offset between the predetermined repeated data sequence contained in the first reduced data signal and the predetermined repeated data sequence contained in the second reduced data signal using a correlator. This sequence offset is used to determine a time delay that is applied to the second data signal, thereby synchronizing the predetermined repeated data sequence contained in the first and second data sequences.

Inventors: Langberg; Ehud (Wayside, NJ), Liu; Weimin (Aberdeen, NJ), Liu; Xiao (Ocean, NJ), Scholtz; William (Middletown, NJ)

Assignee: Globespan, Inc.

International Classification: H04L 27/26 (20060101); H04L 7/04 (20060101); H04J 003/06 ()

Expiration Date: 10/30/2018