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Digital linearizer for RF amplifiers
| Publication type | Journal paper |
|---|---|
| Year of publication | 1997 |
| Authors | Sante Andreoli, H. G. McClure, Paolo Banelli, and Saverio Cacopardi |
| Title | Digital linearizer for RF amplifiers |
| Journal title | IEEE Transactions on Broadcasting |
| Volume | 43 |
| Issue | 1 |
| Pages | 12–19 |
| Editor | |
| Publisher | IEEE |
| Date | March 1997 |
| Place | |
| ISSN number | 0018-9316 |
| ISBN number | |
| Key words | Amplifier, High power, Linearity, Broadcasting, Signal distortion, Non linear distortion, Modulation, Simulation |
| Abstract | Broadcast technology is at the beginning of a new era. It is characterized by the intensive use of the most advanced digital modulations formats (8VSB, QAM, OFDM) in combination with high power RF amplifiers. To date the linearity required for these digital formats has only been accomplished in cumbersome low efficiency class A amplifier or even more cumbersome feed-forward systems. A potentially more efficient and cost effective approach is the combination of non linear power amplifiers and a predistortion technique capable of compensating for the non linear amplifiers. Digital predistortion will provide a highly linear output and improved efficiency. Itelc6 has developed a digital adaptive base band predistorter to provide for improved performance and cost. The technique is independent of the modulation type, the output frequency, or the signal bandwidth. Furthermore the capability of automatic adaptive predistortion to compensate for the environment (temperature, power supply variations, aging ,and even operation during replacement of a faulty module) is highly desirable. |
| URL | |
| DOI | http://dx.doi.org/10.1109/11.566819 |
| Other information | |
| Paper |