Complex Baseband Modeling and Digital Predistortion for Wideband RF Power Amplifiers (2006)
Abstract / truncated to 115 words
Modern modulation methods as used in 3rd generation mobile communications (UMTS) generate strongly fluctuating transmission signal envelopes with high peak-to-average power ratios. These properties result in significant distortion due to the nonlinear behavior of the radio-frequency power amplifier (RF PA). We propose different nonlinear model structures for such amplifiers, based on memory polynomials and frequency-domain Volterra kernel expansion, where we can reduce the number of free parameters by 80% compared to traditional Volterra series approaches. Because these nonlinear models incorporate memory, we are able to model the nonlinear distortion of RF PAs with sufficient accuracy (e.g., −30 dB relative modeling error ), including the wideband case (bandwidth B = 20 MHz as needed for four-carrier ...
RF-PA – predistortion – nonlinear modeling – volterra
Information
- Author
- Singerl, Peter
- Institution
- Graz University of Technology
- Supervisors
- Publication Year
- 2006
- Upload Date
- July 17, 2014
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