Title :
A wideband digital pre-distortion platform with 100 MHz instantaneous bandwidth for LTE-advanced applications
Author :
Wu, Huang-Jie ; Jing Xia ; Zhai, Jian-Feng ; Tian, Ling ; Yang, Meng-Su ; Zhang, Lei ; Zhu, Xiao-Wei
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
In this paper, a digital pre-distortion platform is designed for linearization of wideband power amplifier with nonlinearity and memory effect. The proposed platform consists of digital signal processing (DSP), field-programmable gate array (FPGA), analog to digital converter (ADC) and digital to analog converter (DAC) which are all operating under a high speed of 400MHz. The platform covers a frequency band from 1.9 GHz to 3.5 GHz and supports a bandwidth up to 100 MHz PTE-Advanced application. Experimental validation is carried out on a 1.95 GHz Gallium-Nitride(GaN) Doherty power amplifier (DPA) driven by a LTE-Advanced signal with bandwidth of 100 MHz and peak-to-average power ratio(PARP) of 9.8 dB. The testing DPD results show that adjacent channel leakage ratio (ACLR) reaches -50 dBc with about 15 dB improvement.
Keywords :
III-V semiconductors; UHF power amplifiers; analogue-digital conversion; digital signal processing chips; digital-analogue conversion; field programmable gate arrays; gallium compounds; microwave power amplifiers; wide band gap semiconductors; wideband amplifiers; ADC; DAC; DPA; DSP; Doherty power amplifier; FPGA; GaN; LTE-advanced application; PARP; analog to digital converter; bandwidth 100 MHz; digital signal processing; digital to analog converter; field-programmable gate array; frequency 1.9 GHz to 3.5 GHz; frequency 400 MHz; instantaneous bandwidth; memory effect; noise figure 9.8 dB; nonlinearity effect; peak-to-average power ratio; wideband digital pre-distortion platform; wideband power amplifier; Bandwidth; Conferences; Microwave amplifiers; Radio frequency; Digital pre-distortion; Doherty; LTE-Advanced; Wideband;
Conference_Titel :
Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2012 Workshop on
Conference_Location :
Dublin
Print_ISBN :
978-1-4673-2950-7
Electronic_ISBN :
978-1-4673-2948-4
DOI :
10.1109/INMMIC.2012.6331949
