Results 81 to 90 of about 179 (135)
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Performance analysis for scalar digital predistortion
2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, 2013The scalar digital predistortion (DPD) technology is an attractive linearization method for power amplifier (PA). By using the method, the hardware is simplified greatly because only the out-band distortion power is feedback to train the predistorter.
Zhan Shi +3 more
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Digital predistortion with low-precision ADCs
2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017Digital Predistortion (DPD) is a popular technique for linearizing a power amplifier (PA) to help reduce the spurious emissions and spectral regrowth. DPD requires the learning of the inverse PA nonlinearities by training on the output of the PA. In practical systems, the analog output of the PA will have to go through an analog-to-digital converter ...
Chance Tarver, Joseph R. Cavallaro
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A novel predistorter model for digital predistortion of RF power amplifiers
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology, 2012Power amplifiers (PAs) are inherently nonlinear devices and are used in virtually all kinds of communication systems. Whereas, digital predistortion (DPD) is one of the cost-effective ways to improve the linearization performance of PAs. In this paper, a novel perdistorter model, which is used in digital predistortion of RF power amplifiers and based ...
X. Bin Guo +3 more
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Digital memory-based predistortion
IEEE MTT-S International Microwave Symposium Digest, 2005., 2005A predistortion algorithm based on a memory-based power amplifier model (PA) is presented. The algorithm was tested using a PA measurement system. The predistortion techniques are based on the filtered tapped delay line (TDL) model. Memoryless predistortion techniques are also presented to show the benefits of the memory-based predistortion approach ...
S. McBeath, D. Pinckley
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An adaptive algorithm for digital predistortion
2006 10th IEEE Singapore International Conference on Communication Systems, 2006This article presents an adaptive digital predistortion (DPD) for linearizing RF power amplifiers (PA). The idea is to use nonlinear curve-fitting in conjunction with the look-up table to adaptively pre-adjust the gain and the phase of the input data before it is fed to the amplifier. The performance of the algorithm is tested by simulation.
Shanying Wu, S.f. Hau, Yi Zhao
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Optimization of Digital Predistortion with Memory
2018Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2018In this paper identification of the digital predistortion (DPD) operator for power amplifier (PA) linearization is considered. Improving the identification performance generally amounts to finding the appropriate reduced-complexity parametrized model of memory nonlinearity and to avoid ill-conditionality of the corresponding LS problem.
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Digital predistortion for power amplifiers
The power amplier (PA) is one of the most critical subsystems in wireless (and wired) trans- mitters. Not only is it one of the most power hungry devices that accounts for most of the direct current (DC) power consumed in macro base stations, but also it is the main source of nonlinear distortion in the transmitter.Gilabert Pinal, Pere Lluís +1 more
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