signal averaging

signal averaging

An MRI term for signal-to-noise improvement by averaging several free induction decays (FIDs) under similar conditions. The approximate amount of improvement in signal-to-noise (S/N) ratio is calculated as the square root of the number of excitations.
References in periodicals archive ?
The term Pattern Visually Evoked Potential (P-VEP) refers to electrical potentials which are recorded from the scalp overlying visual cortex, P-VEP waveforms are extracted from the electro-encephalogram (EEG) by signal averaging.
Separation of the buried EP wave forms from the other electrical activity is accomplished by signal averaging. Stimuli are given repetitively and the computer averages the new data acquired after each stimulus (Random EEG + EP) with the averaged results from previous stimuli stored in its memory.
The research was financially supported by the state program "Science" # 936 "Development of medical nanosensors and hardware-software complex for noninvasive micropotential registration during human biopotential real-time measuring in wide frequency band without signal averaging and filtration for electrophysiological research and artificial limb control".
Faulkner,"Optimum Hysteresis Level, Signal Averaging Time and Handover Delay," Proc.
The fact that SSEP remains consistent was used to implement a signal averaging method to extract the SSEP [4, 5].
Bunde et al., "Phase-rectified signal averaging detects quasi-periodicities in non-stationary data," Physica A, vol.
ADLINK's 14-bit PCIe-9852 two-channel 200-MS/s digitizer also includes onboard signal averaging. Alan Hsu.
But the initial defect of the valve can be undetected because of engine noise and signal averaging. The model is adaptive, which means that the diagnostic program obtains the base model after each change of the drive system element.
An ordinary camera can capture events at 2,400 GSa/s and achieve a dynamic range exceeding 3,000:1 on a single-shot basis (without signal averaging).
The Monebo solution, on the other hand, takes advantage of advanced signal averaging techniques and sampling of key "fiducial" points to negate the need for this warm-up time.