A1175668: Added Matlab synopsis code/output.

2013-07-30T06:59:53Z

Added Matlab synopsis code/output.

← Older revision		Revision as of 16:29, 30 July 2013
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	We have implemented this technique using both Matlab and Labview, and have made our software available at [https://github.com/LachlanGunn/stochastic-instrumentation-tools https://github.com/LachlanGunn/stochastic-instrumentation-tools].		We have implemented this technique using both Matlab and Labview, and have made our software available at [https://github.com/LachlanGunn/stochastic-instrumentation-tools https://github.com/LachlanGunn/stochastic-instrumentation-tools].

			First, a brief example:

			<nowiki>
			t = 0:0.2e-5:1;

			% Make a ramp.
			input = (t-0.5)4 + 1e-4randn(size(t));

			% Distort the ramp with a logistic function.
			distorted = ( 1./(1+exp(-input)) - 0.5 )*4;

			% Undo the distortion.
			est_input = compensate_nonlinear(distorted , 40, 1e-3);

			% Plot the results
			figure();
			plot(t, input, 'b');
			hold on;
			plot(t, distorted, 'r');
			plot(t, est_input, 'Color', [1, 0.5, 0]);
			hold off;
			legend('Input', 'Distorted', 'Compensated');
			</nowiki>

			[[Image:compensate_nonlinear_ramp_example.png]]

			We see that <em>compensate_nonlinear</em> has been able to recognise the shape of the distortion and remove its effect.

A1175668: Initial commit.

2013-07-30T05:30:33Z

Initial commit.

New page

Many electronic systems exhibit some degree of nonlinearity. While this is acceptable to some degree, pushing a device deep into saturation will drastically reduce the utility of one's collected data. We have developed a technique to automatically remove this distortion without knowledge of the distorting transfer function, by stretching regions of the output so that the noise floor remains constant over the entire output range.

We have implemented this technique using both Matlab and Labview, and have made our software available at [https://github.com/LachlanGunn/stochastic-instrumentation-tools https://github.com/LachlanGunn/stochastic-instrumentation-tools].

Compensation of distortion - Revision history

A1175668: Added Matlab synopsis code/output.

A1175668: Initial commit.