Patent ID: 7079603

Claim:
A method of correlating discrete-time signal segments, said method comprising the steps of: a) providing a signal for transmission from a transmitter to a receiver, said signal including a predetermined signal section; and b) storing the predetermined signal section in the receiver as an erroned hierarchical sequence {tilde over (h)} , wherein said erroned hierarchical sequence {tilde over (h)} is represented by a hierarchical sequence h and an error sequence h e as follows: {tilde over (h)} (k) =h ( k )+ h e ( k ), k= 0 , . . . ,m− 1, wherein m is a natural number and defines a length of the sequences, {tilde over (h)} , h and h e , and wherein elements of {tilde over (h)} and h have a range of values: {−α, +α} and elements of h e have a range of values: {−2α, 0, +2α}, wherein α represents any real or complex number; c) correlating the erroned hierarchical sequence {tilde over (h)} stored in step b) with a received signal received in the receiver to determine a position of the predetermined signal section in the received signal, said correlating comprises forming a sum of a correlation between the received signal and said hierarchical sequence h and a correlation between the received signal and said error sequence h e .