论述了一种基于DSP的软件无线电台的基带处理架构及频偏估计设计方法。首先介绍了系统硬件方案,然后对DSP软件架构进行了论述,包括帧结构、EDMA通道中断和串口中断处理流程。最后重点介绍了频偏估计的原理和具体实现方法,并给出了测试结果。
In this paper, a software radio baseband processing architecture and design of frequency offset estimation based on DSP are described. The hardware architecture of system is introduced. Then the soft architecture of the DSP is described, including the frame structure and the process of the EDMA channel interruption and the serial ports interruption. At last it focus on the theory of the frequency offset estimation and implementation method, and the test result is given.