Patent ID: 6430235
Filing Date: 2002-08-06
Classification: H04L

Abstract:
A method of feedforward timing estimation for use in a digital receiver within a communication system, the method comprising:splitting an input data stream into a first data stream and a second data stream; applying a first nonlinearity to the first data stream and a second nonlinearity to the second data stream; averaging the instantaneous values of the first nonlinearly derived data stream, comprising: isolating even and odd samples from the first nonlinearly derived data stream, averaging the even samples over an observation interval, averaging the odd samples over an observation interval, and determining the difference between the averaged even samples and the averaged odd samples; averaging the instantaneous values of the second nonlinearly derived data stream, comprising: isolating even and odd samples from the second nonlinearly derived data stream, averaging the even samples over an observation interval, averaging the odd samples over an observation interval, and determining the difference between the averaged even samples and the averaged odd samples; and determining a timing offset as a function of the complex components of the average instantaneous values.