| 基于DSP的数字预失真系统设计 |
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| 引用本文： | 徐志勇,殷瑞祥. 基于DSP的数字预失真系统设计[J]. 现代电子技术, 2010, 33(24): 194-195,199 |
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| 作者姓名： | 徐志勇 殷瑞祥 |
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| 作者单位： | 华南理工大学电子与信息学院,广东广州510641 |
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| 摘 要： | 为提高无线通信系统的通信质量与效率,提出一种基于DSP自适应数字预失真技术的系统设计。采用TI公司的低功耗、高性能数字信号处理器TMS320VC5502,有效提高了信号处理速度,减少了回路延时。根据信号的幅度,数控衰减器工作在不同的控制模式,以满足不同系统输出功率的要求。结果表明,该系统能有效改善功率放大器的线性度,并将功放的邻道功率比（ACPR）降低了10 dB左右。
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| 关 键 词： | 射频功率放大器 数字预失真 线性度 邻通道功率比 |
Design of Adaptive Digital Predistortion System Based on DSP |
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| XU Zhi-yong,YIN Rui-xiang. Design of Adaptive Digital Predistortion System Based on DSP[J]. Modern Electronic Technique, 2010, 33(24): 194-195,199 |
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| Authors: | XU Zhi-yong YIN Rui-xiang |
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| Affiliation: | (School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510641,China) |
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| Abstract: | In order to improve the communication quality and efficiency in wireless communication systems,the design of an adaptive digital predistortion system based on DSP is proposed.The signal processing speed is effectively improved and the circuit delay is reduced by using TI＇s low-power,high-performance digital signal processor TMS320VC5502.According to the amplitude of the signal,NC attenuator works in different control modes to meet different requirements of the system output power.The result shows that this method can effectively improve the linearity of power amplifiers,and the ACPR can be reduced about 10 dB. |
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| Keywords: | RF power amplifier digital predistortion linearity ACPR |
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