Real-time compensation of static distortion by measurement of differential noise gain
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Cites background or methods from "Real-time compensation of static di..."
...This could be some sort of deterministic signal, but in our experiments [11], [12] we have used the input noise of a common-emitter amplifier....
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...We have previously described a technique [11] for the compensation of static nonlinearity using output-only measurements, and succeeded in refining the concept into an algorithm capable of operating in real-time on a microcontroller platform [12]....
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...The unusual high-pass filtering approach is inherited from the arrangements in [12], where we required both high-pass and low-pass outputs....
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...We present a technique here that can be efficiently implemented using fixed-point arithmetic without the need for either divisions or square-root operations as required by [12]....
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...We overcame both of these problems in [12] by integrating a curve-fitted version of (f−1)′(x); a set of triangular radial basis functions were used to describe f ′(x), resulting in a piecewise-linear fitted curve, and a piecewise quadratic fit to the distorting function....
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Cites background from "Real-time compensation of static di..."
...Total harmonic distortion before and after compensation of a distorted sinusoid with the device presented in and as measured in [2], as a function of distortion level and signal frequency (© 2014 IEEE)....
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References
20,436 citations
"Real-time compensation of static di..." refers background in this paper
...Techniques exist [2] to identify nonlinear systems, but these rely on knowledge—or even control—of the system input, and are therefore inappropriate in cases where the system cannot be calibrated, or where the nonlinearity varies with time....
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444 citations
"Real-time compensation of static di..." refers background in this paper
...This term also includes harmonics of the signal being measured, and therefore greater accuracy is achievable in systems with a wider noise bandwidth that extends beyond the measurable distortion products of the signal....
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51 citations
"Real-time compensation of static di..." refers background in this paper
...Some test signals include sinusoids [3], triangular signals [3], and Gaussian noise [4]....
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28 citations