Patent ID: 6505133
Filing Date: 2003-01-07
Classification: A61B

Abstract:
A method for use in operating a signal attenuation measurement device, the measurement device including a source system for generating first and second signals and for transmitting the first and second signals to a medium that attenuates the signals, a detector system for receiving first and second received signals from the medium and for providing a composite detector signal based on the first and second received signals, and a parameter module for determining an attenuation related parameter regarding the medium based on the detector signal, said method comprising:processing the detector signal to provide a processed signal for demultiplexing, said processed signal including information regarding the first and second signals; and code division demultiplexing said processed signal using at least one coded demultiplexing signal, said at least one coded demultiplexing signal including a series of values defining a non-periodic code such that said demultiplexing of said processed signal using said at least one coded demultiplexing signal yields demultiplexed information corresponding to each of said first and second signals; wherein said demultiplexed information is used by the parameter module for determining the attenuation related parameter regarding the medium.