Estimating the operating point on a non-linear traveling wave tube amplifier
AssigneeThe DIRECTV Group, Inc.
InventorsErnest C. Chen, Shamik Maitra
Life of this patent
Estimating the term…
Abstract
A method, apparatus, article of manufacture, and a memory structure provide the ability to determine an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA). The non-linearity of the TWTA is measured. An input roots mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA is computed. The RMS value identifies an input operating point of the measured non-linearity of the TWTA. Lastly, an output operating point is obtained.
Claims48
A method for determining an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA), comprising:
- measuring non-linearity of the TWTA;
- computing an input root-mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA, wherein the input RMS value identifies an input operating point of the measured non-linearity of the TWTA;
- and
- obtaining an output operating point.
An apparatus for determining an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA), comprising:
- means for measuring a non-linearity of the TWTA;
- means for computing an input root-mean-square (RMS) value of an input signal used to measure the nonlinearity of the TWTA, wherein the input RMS value identifies an input operating point of the measured non-linearity of the TWTA;
- and
- means for obtaining an output operating point.
A system for determining an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA), comprising:
- (a) a measuring module configured to:
- (1) measure non-linearity of the TWTA;
- and
- (2) obtaining an output operating point;
- and
- (b) a non-linear distortion map module configured to compute an input root-mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA, wherein the RMS value identifies an input operating point of the measured non-linearity of the TWTA.
Dependencies are inferred from the claim text.