Preamble detection at low signal-to-noise levels

摘要

A preamble detector has a correlator outputting for every sample position of the preamble part of an incoming sampled signal stream a score and associated class value; and a multiple cluster unit receiving the class and score output values from the correlator, wherein a first cluster receives output values from the correlator and the following clusters are coupled in series such that each cluster receives output values from the correlator and a preceding cluster and wherein the output values of the correlator and a cluster are processed such that an n-th cluster of the multiple cluster unit, with n>1, accumulates the highest score values of n score values with matching class values.

主权项

1. A preamble detector, comprising:
a correlator outputting for every sample position of a preamble part of an incoming sampled signal stream a score and associated class value, wherein the correlator correlates sequential symbols starting at each sample position; a multiple cluster unit receiving the class and score output values from the correlator, wherein a first cluster receives output values from the correlator and following clusters are coupled in series such that each cluster receives output values from the correlator and a preceding cluster and wherein said output values of the correlator and a cluster are processed such that an n-th cluster of the multiple cluster unit, with n>1, accumulates a highest score value of n score values with matching class values.