Capturing asymmetrical spectral regrowth in RF systems using a multislice behavioral model and enhanced envelop transient analysis
✍ Scribed by Wonhoon Jang; Aaron Walker; Kevin Gard; Michael B. Steer
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 172 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1096-4290
No coin nor oath required. For personal study only.
✦ Synopsis
Nonlinear distortion in RF and microwave systems results in spectral regrowth of digitally modulated signals. The distortion above and below the main channel can be at different levels and this is attributed to baseband effects. This article presents a new multislice behavioral-model architecture that captures this asymmetry and can be implemented in a variety of circuit simulators, including SPICE, harmonic balance (HB), envelope transient (ET), and system simulators. The work is experimentally validated using an HBT power amplifier at 2.5 GHz driven by a WCDMA signal. The model is used with envelope transient circuit simulation which is enhanced to accommodate an arbitrary baseband transfer function.