Name
Title | ||
|---|---|---|
A Wideband Digital Predistorter For A Doherty Power Amplifier Using A Direct Learning Memory Effect Filter |
Abstract | ||
|---|---|---|
This paper presents a digital predistorter with a wideband memory effect compensator for a Doherty power amplifier (PA). A simple memory-predistortion model, which consists of a look-up-table (LUT) and an adaptive filter equalizing memory effects, and a new memory effect estimation algorithm using a direct-learning architecture are proposed. The proposed estimation algorithm has an advantage that a transfer function of a feedback circuit does not affect the learning process. The predistorter is implemented in a field programmable gate array (FPGA) and a digital signal processor (DSP). The transmitter has achieved distortion level of -50.8 dBr at signal bandwidth away from the carrier, and PA module efficiency of 24% with output power of 43 dBm at 2595 MHz under a 20 MHz-bandwidth orthogonal frequency division multiplexing (OFDM) signal using laterally diffused metal oxide semiconductor (LDMOS) FETs. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1587/transele.E93.C.975 | IEICE TRANSACTIONS ON ELECTRONICS |
Keywords | Field | DocType |
predistortion, adaptive filter, memory effect, power amplifier, Doherty amplifier | Digital signal processing,Doherty amplifier,LDMOS,Digital signal processor,Linear amplifier,Electronic engineering,Adaptive filter,Engineering,Electrical engineering,Orthogonal frequency-division multiplexing,Amplifier | Journal |
Volume | Issue | ISSN |
E93C | 7 | 1745-1353 |
Citations | PageRank | References |
1 | 0.43 | 6 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kenichi Horiguchi | 1 | 2 | 0.83 |
| Naoko Matsunaga | 2 | 1 | 0.77 |
| Kazuhisa Yamauchi | 3 | 1 | 1.11 |
| Ryoji Hayashi | 4 | 3 | 2.54 |
| Moriyasu Miyazaki | 5 | 1 | 2.80 |
| Toshio Nojima | 6 | 13 | 9.63 |