Method and apparatus for reducing non-linear characteristics of a signal modulator by coherent data collection
US6426822B1 · kind B1 · utility
40Cited by
16References
26Claims
0Family size
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Key dates
| Filing date | Jun 25, 1998 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/50575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A pilot signal is generated and injected into the input (108) of a signal modulator (104). The harmonic signal of a pilot signal produced at the output (110) and due to the non-linear transfer function of the signal modulator (104) is coherently sampled in the time domain to produce a plurality of digital samples. The digital samples are averaged to produce an average harmonic signal value. The bias voltage at which the signal modulator (104) is biased is adjusted to minimize the magnitude of the average harmonic signal value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.