Thresholds Optimization of Decomposed Vector Rotation Model for Digital Predistortion of RF Power Amplifier

Adaptive Digital Baseband Predistortion for RF Power Amplifier Linearization

Power amplifiers (PAs) are vital components in many communication systems. To be transmitted wirelessly, a signal must be amplified with high fidelity so as to account for attenuation through the channel or propagation medium. The linearity of a PA response constitutes an important factor that ensures signal integrity and reliable performance of the communication system. Unfortunately, PAs are ...

Multi Look-Up Table Digital Predistortion for RF Power Amplifier Linearization

Diode Predistortion Linearization for Power Amplifier RFICs in Digital Radios

The recent trend in modern information technology has been towards the increased use of portable and handheld devices such as cellular telephones, personal digital assistants (PDAs), and wireless networks. This trend presents the need for compact and power efficient radio systems. Typically, the most power inefficient device in a radio system is the power amplifier (PA). PA inefficiency require...

Digital Predistortion Techniques for Rf Power Amplifiers with Cdma Applications

With the increasing importance of spectral efficiency in mobile communications, linearity of the RF PA has become a critical design issue for non-constant-envelope digital modulation schemes.1 This issue is particularly significant in spread spectrum applications such as CDMA and wideband CDMA (W-CDMA) base stations, where the peak-to-average ratio of modulated RF signals can vary over a range ...

PREDISTORTION Linear Power Amplifier Uses Mirror Predistortion

Current wireless c o m m u n i c a t i o n standards have been established to carry voice, data and video with high data rates. These high data rates require efficient modulation techniques such as OFDM 64 QAM, to allow transmission in a given finite bandwidth. With these types of modulation, there are probabilities that at certain times, the voltages of the multiple carriers are in phase and t...