| 摘要: |
| 针对速率可变的高阶正交幅度调制(QAM)信号定时同步问题，提出了一种基于Gardn
er理论的定时同步改进算法。新算法改原有滤波器结构为两级插值级联优化结构来实现多速
率信号的定时同步，可独立于载波同步单独使用，比传统结构具有更强的普遍适用性。仿真
结果表明，该算法可以准确地对速率可变的128QAM信号进行同步。 |
| 关键词: 软件无线电 数字接收机 定时同步 正交幅度调制 Gardner
算法 可变速率 |
| DOI： |
|
| 基金项目:国家自然科学基金委员会-中国工程物理研究院联合基金资助项
目(10876006) |
|
| A modified method of timing synchronization for multi-rate high-order QAM |
| ZHANG Li-li,HE Zhi-ming |
| () |
| Abstract: |
| On the basis of Gardner interpolation theory about timing synchronizat
ion, a modified timing recovery method is proposed to adapt multi-rate high-orde
r QAM demodulation. The algorithm replaces the traditional filter with two-stage
cascade filters to realize the carrier synchronization, which is more
suitable for multi-rate timing synchronization. The simulation results show
that the algorithm can be used in timing synchronization for 128 QAM signal prec
isely. |
| Key words: software defined radio digital receiver timing synchronization quadrature ampli
tude modulation(QAM) gardner algorithm multi-rate |
