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| Content Provider | IET Digital Library |
|---|---|
| Author | Hui, Ming Zhang, Meng Zhang, Xingang Zhu, Xiaowei Zhang, Xiupu Cheng, Jiali |
| Abstract | A time-division polynomial (TDP) model is proposed for modelling and linearising a 1.5 T magnetic resonance imaging (MRI) power amplifier (PA) with strong non-linearity in high input signal dynamic range. In order to demonstrate the merit of this non-linear model, a 64 dBm 1.5 T MRI PA (63.89 MHz) and two different Sinc-pulse signals are used in modelling and linearisation measurements. The TDP is compared with the conventional non-memory polynomial (NMP) and no digital pre-distortion for the 1.5 T MRI PA, which is driven by test signal with 2 ms time length and 2% duty cycle. The proposed TDP leads to up to 9 dB improvement in the normalised mean square error compared with the NMP in two different test signals. More importantly, TDP illustrates significantly better reduction in amplitude modulation/amplitude modulation (AM/AM) and amplitude modulation/phase modulation (AM/PM) conversion compared with the NMP. |
| Starting Page | 391 |
| Ending Page | 393 |
| Page Count | 3 |
| Volume Number | 2017 |
| e-ISSN | 20513305 |
| Issue Number | Issue 7, Jul (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2017/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2017.0195 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2017-06-05 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | AM-AM Conversion AM-PM Conversion Amplifiers Digital Pre-distortion Frequency 63.89 MHz Interpolation And Function Approximation Linearisation Measurement Linearisation Technique Magnetic Flux Density 1.5 T Magnetic Resonance Imaging Magnetic Resonance Imaging PA Mean Square Error Method Microwave Circuit And Device MRI Power Amplifier NMP Nonlinear Model Nonmemory Polynomial Normalised Mean Square Error Numerical Analysis Polynomial Radiofrequency Power Amplifiers Sinc-pulse Signal TDP Model Time 2 Ms Time-division Polynomial Model Time-division Polynomial Pre-distorter |
| Content Type | Text |
| Resource Type | Article |
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