Patent ID: 7164720
Filing Date: 2007-01-16
Classification: H04B

Abstract:
1. A method for acquiring a received impulse radio signal, comprising: correlating a region, including a plurality of cells, of the received impulse radio signal using a plurality of template signals, each template signal having a different delay to obtain a correlation value for each template signal, wherein the received impulse radio signal is expressed by where α 1 is an amplitude coefficient, s j is a corresponding transmitted impulse radio signal, τ 1 is a delay of an l th multipath component, W rec is a received pulse, and σ n (t) is white Gaussian noise with unit power spectral density, T f is an average pulse repetition time, T c is a minimum resolvable path interval, N f is the number of pulses representing one information symbol; averaging the correlation values; determining a difference between successive averages of the correlation values; and selecting a particular delay associated with a particular template signal having a substantial increase in the difference of the successive averages to locate a signal cell in the region.