Patent ID: 6831467
Filing Date: 2004-12-14
Classification: A61B,G06K,H04B

Abstract:
An apparatus for creating a recording of a system output composed of superposed waveforms, said system output arising from a tested system, said system tested with stimuli, said system output having an associated estimated system-response waveform, said estimated system-response waveform having frequencies of interest within a bandpass of interest, said apparatus comprising: (a) At least one stimulus-generating means that stimulates said tested system, said stimulus-generating means generating at least one sequence of stimuli with a timing pattern, said timing pattern being that of a q-sequence, wherein said q-sequence is a pseudo-periodic sequence having a definitive time pattern, wherein said q-sequence has a maximum stimulus-interval ratio less than unity and greater than zero, wherein said q-sequence has associated frequencies, said frequencies each having an associated Fourier coefficient vector magnitude, said coefficient vector magnitude ranging between zero and the number of stimuli in said q-sequence, and further wherein the vector magnitude of each said Fourier coefficient of said q-sequence within said bandpass of interest is 0.5 or greater, (b) At least one data-acquisition means including a recording means, said recording means recording at least one of the following: (1) only said system output to form a system-output-only recording, (2) both the system output from said tested system and an alignment signal to form both a system output recording and an alignment signal recording, said alignment signal being correlated with said timing pattern.