| WCDMA数字中频发信机的设计 |
| |
| 引用本文： | 曾健平,李玉国,张亦驰,汤波,孙凡博.WCDMA数字中频发信机的设计[J].宇航计测技术,2010,30(1):43-46. |
| |
| 作者姓名： | 曾健平 李玉国 张亦驰 汤波 孙凡博 |
| |
| 作者单位： | 湖南大学物理与微电子科学学院,湖南长沙,410082 |
| |
| 基金项目： | 湖南省自然科学基金项目，湖南省科技计划项目 |
| |
| 摘 要： | 基于软件无线电技术的设计理念,提出了一种新型的WCDMA数字中频发信机结构:内插和滤波设计中采用根升余弦数字滤波器(RRC)、半带滤波器(HB)以及积分梳状滤波器(CIC)三者相结合的方式,在数字域进行三载合路,并使用削峰和数字预失真技术对信号进行优化处理。新型结构使得设计灵活性更大,对射频功放线性度要求更低。关键模块的Matlab仿真结果表明,三载波主要性能指标邻道泄露比(ACLR)在5 MHz和10 MHz处改善度分别为20 dB和18 dB,达到-58 dBc和-60 dBc,完全满足3GPP协议的设计要求。
|
| 关 键 词： | 数字中频发信机 数字预失真 削峰 |
The Design of WCDMA Digital Intermediate Frequency Transmitter |
| |
| ZENG Jian-ping,LI Yu-guo,ZHANG Yi-chi,TANG Bo,SUN Fan-bo.The Design of WCDMA Digital Intermediate Frequency Transmitter[J].Journal of Astronautic Metrology and Measurement,2010,30(1):43-46. |
| |
| Authors: | ZENG Jian-ping LI Yu-guo ZHANG Yi-chi TANG Bo SUN Fan-bo |
| |
| Institution: | (School of physics and microelectronics and science, Hunan Univ, Changsha, Hunan 410082 ) |
| |
| Abstract: | This paper proposes a new structure of digital intermediate frequency transmitter based on the software defined radio:using root raised cosine filter,half band filter and cascaded integrator Comb filter in interpolation and filter design,combine three carriers in digital domain and adopt Crest Factor Reduction(CFR) and Digital Pro distortion(DPD) technology to optimize the signal quality.This new structure improve the designing flexibility and lower the requirement of PA linearity.The simulation result using matlab demonstrate that:main performance index Adjacent Channel Leakage Ratio(ACPL)improve 20dB and 18dB at 5MHz and 10MHz respectively,reach to 58dBc and 60dBc, and meet the demands of 3GPP protocol. |
| |
| Keywords: | ~+DIF Digital transmitter ~+DPD ~+CFR |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
