Compensation of nonlinearities of transmission members in a radio relay system
US4414686A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Mar 31, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3241
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for compensating nonlinearities of a transmission member in a radio relay transmission system by means of a linear converter having a linear gain characteristic and a harmonic generator converter having a nonlinear characteristic, in which an intermediate frequency signal modulated a useful signal is converted by a local oscillator signal into a radio frequency signal and the output signals of the two converters are linked together by a network. The method further includes: setting the operating point of the harmonic generator converter in a manner to cause its output signal to be essentially composed of components corresponding to the useful signal and to third order intermodulation products thereof; modifying the harmonic generator converter output signal by substantially suppressing the useful signal component from that output signal and setting the amplitude of the remaining third order intermodulation products component of that output signal; setting a relative phase position between the modified output signal of the harmonic generator converter and the output signal of the linear converter; and combining the modified output signal of the harmonic generator converter …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.