Zero crossing method of symbol rate and timing estimation

Details Zero crossing method of symbol rate and timing estimation Zero crossing method of symbol rate and timing estimation

2003-01-08

2008-03-04

Burd, Kevin (Department: 2611)

Pulse or digital communications

Testing

Phase error or phase jitter

C375S354000

Reexamination Certificate

active

07339985

ABSTRACT:
System and method for analyzing communication signals. A digital signal comprising multiple samples is received, representing a plurality of binary symbols. Zero crossings of the signal are determined, each comprising a respective first sample immediately preceding the zero crossing and a respective second sample immediately following the zero crossing. Per zero crossing, an error expression is determined interpolating between the first and second samples as a function of estimated period T and estimated offset τ of the signal. Based on the error expressions, values of T and τ are determined using a linear fit that minimizes a total error of values of the error expressions. T and τ are usable in analyzing the signal, e.g., each zero crossing corresponds to a respective symbol represented by a respective segment of the signal. The segments are overlaid based on T and τ, forming an eye diagram usable to analyze the signal.

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Simulink Manual, Model-Based and System-Based Design, Using Simulink Version 5, 7 pages, Jul. 2002.

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