| 摘要: |
| 根据WCDMA无线直放站锁相环的特点，结合Σ-Δ调制小数分频锁相环
噪声低、分辨率高、步进小的优点，给出了一种适用于WCDMA无线直放站的基于Σ-Δ调制小
数分频锁相环，并采用ADS工具对系统进行了仿真。仿真证明了基于Σ-Δ调制小数分频的WC
DM
A无线直放站锁相环模型的正确性，对WCDMA无线直放站锁相环设计有一定的指导意义。 |
| 关键词: WCDMA 无线直放站 Σ-Δ调制 三阶无源环路滤波器 小数分
频 锁相环设计 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（NF010103）；广西教育厅科研项目
(200708MS005);广西自然科学基金资助项目(0832245) |
|
| Design of Sigma Delta Fractional N PLL for WCDMA Wireless Repeater |
| WANG Ji-ping,YANG Jin-mei,QIN Yuan-nian,TIAN Ke-chun |
| (College of Information and Communication Engineering,
Guilin University of Electronic Technology, Guilin 541004, China) |
| Abstract: |
| According to the characteristics of PLL for WCDMA wireless repeater
and advantages of low noise, high resolution, small steps of Σ-Δ mod
ulated fractionalN PLL,a Σ-Δ modulated fractionalbased PLL
for WCDMA wireless repeater is proposed, and the system is simulated by ADS. S
imulation results show that WCDMA wireless repeater PLL model based on the
Σ-Δ modulated fractionalN is correct,and it has some significance to the
WCDMA wireless repeater PLL design. |
| Key words: WCDMA wireless repeater sigma delta modulation third order passive loop filte
r dicimal fractional frequency PLL design |
