Performance comparison of adaptive digital predistortion algorithms using adaptation time for mobile WiMAX power amplifier applications

Demonstration of a Power Amplifier Linearization Based on Digital Predistortion in Mobile Wimax Application

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 ...

A High Efficiency Doherty Amplifier with Digital Predistortion for WiMAX

The Doherty amplifier architecture is a well known technique offering the potential to improve transmitter efficiency especially for signal protocols that exhibit high peak-toaverage power ratios. Although the Doherty approach has significant efficiency advantages, it generally must be augmented with some form of correction or linearity enhancement in the full transmitter design. Wireless infra...

A Reconfigurable Power Amplifier for Mobile WIMAX Applications

This paper presents the design of a reconfigurable power amplifier for Mobile WIMAX applications in the user terminal. The amplifier, which operates from 3.4GHz to 3.5GHz, is based on the Doherty technique. This power efficiency enhancement technique is suitable for modern wireless communications systems, as Mobile WIMAX, that present with high peak-to-average power ratio (PAPR) to target high ...

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...