Noise measurement system and method
AssigneeAgilent Technologies, Inc.
InventorsShigetsune Torin, Kenneth H. Wong, David VerNon Blackham
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Abstract
Noise power is measured within one or more designated frequency bands of an applied signal. The measurement includes frequency translating the applied signal by a set of equally spaced frequencies to form a corresponding set of intermediate frequency signals, measuring the noise in at least two measurement bands of each of the intermediate frequency signals that are separated by the frequency spacing of the equally spaced frequencies, and determining the noise power in the designated frequency band of the applied signal based on the noise measurements.
Claims17
A system for measuring noise within a designated frequency band of an applied signal, comprising:
- a frequency converter frequency translating the applied signal by a set of equally spaced frequencies to provide a corresponding set of intermediate frequency signals;
- a sampler measuring the noise in at least two measurement bands of each of the intermediate frequency signals that are separated by the frequency spacing of the equally spaced frequencies;
- and
- a signal processor determining the noise power in the frequency band of the applied signal based on the noise measured by the sampler by solving a matrix equation resulting from the noise measured in the at least two measurement bands of each of the intermediate frequency signals and applying the least squares method.
A method for measuring noise within a frequency band of an applied signal, comprising:
- (a) frequency translating the applied signal by a set of equally spaced frequencies to form a corresponding set of intermediate frequency signals;
- (b) measuring the noise in at least two measurement bands of each of the intermediate frequency signals that are separated by the frequency spacing of the equally spaced frequencies;
- and
- (c) determining the noise power in the frequency band of the applied signal based on the noise measured in (b) by solving a matrix equation resulting from the noise measurements in (b) and applying the least squares method.
Dependencies are inferred from the claim text.