A wideband digital pre-distortion platform with 100 MHz instantaneous bandwidth for LTE-advanced applications
A wideband digital pre-distortion platform with 100 MHz instantaneous bandwidth for LTE-advanced applications
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DOI：
10.1109/inmmic.2012.6331949
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
H. Wu;J. Xia;Jianfeng Zhai;Ling Tian;Meng-Su Yang;Lei Zhang;Xiaowei Zhu
中科院分区：
文献类型：
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作者：
H. Wu;J. Xia;Jianfeng Zhai;Ling Tian;Meng-Su Yang;Lei Zhang;Xiaowei Zhu
针对具有非线性和记忆效应的宽带功率放大器的线性化问题，设计了一种数字预失真平台。该平台由数字信号处理（DSP）、现场可编程门阵列（FPGA）、模数转换器（ADC）和数模转换器（DAC）组成，均在400MHz的高速下工作。该平台覆盖1.9 GHz至3.5 GHz频段，支持带宽高达100mhz的PTE-Advanced应用。在带宽为100 MHz、峰值平均功率比（PARP）为9.8 dB的LTE-Advanced信号驱动的1.95 GHz氮化镓（GaN） Doherty功率放大器（DPA）上进行了实验验证。测试结果表明，相邻通道泄漏比（ACLR）达到-50 dBc，提高了约15 dB。
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.