软件无线电中采样率转换技术的实现及在3G中的应用

目前移动通信标准繁多,且新旧体制混杂,很难做到统一.为了实现互连互通,目前比较可行的方法是采用软件无线电.采样率转换技术是实现互连互通的关键.文中针对第三代移动通信系统(3G)中不同通信体制的带宽、速率要求,根据分级变换的思想,对3G中的CDMA2000和TDSCDMA的采样率转换方案进行了设计,并对3G中的5种制式的采样率转换方案进行了分析比较.实验表明,这一方案可以在采样率变换的高效网络结构基础上进一步降低滤波运算量和存储量.

Application of Sample Rate Conversion Based on Software Radio in 3G Mobile Communication

As the mobile communication systems develop from 2G to 3G, people require a uniform-spectrum, uniform-mode and uniform-architecture. Software radio provides a key solution to the interconnection of various communication architectures and radio standards with different spectrum, poor cooperation capability and so on. Sample rate conversion based on software radio is the key technology to implement the interconnection. According to different requirements for the bandwidths and rates of various standards in 3G mobile communication systems, we designed the corresponding sample rate conversion schemes for CDMA2000 and TD-SCDMA and compared the sample rate conversion schemes for five standards in 3G with each other. Experimental results show that our designs can effectively reduce the computing cost and memory cost in filtering.