用于802.11p的低功耗紧凑型FFT处理器的研究

摘要

符合802.11p协议标准的基带与射频芯片是车载无线宽带通信系统的核心，其性能直接决定了车载无线宽带通信系统的性能。快速傅里叶变换(FFT)处理器是决定无线基带芯片性能的核心电路，该文通过分析FFT算法的特点，设计了一种用于802.11p的低功耗紧凑型64点处理器。该FFT处理器采用块浮点运算技术与单蝶形并行结构，极大地提高了FFT处理器的数据运算精度与运算速度。%The 802.11p protocol standard baseband and RF chip are the core of the vehicle wireless broadband communication system, and their performances directly determine the performance of the vehicle wireless broadband communication system. Fast Fourier transform processor is the core circuit which determines the performance of wireless baseband chip. In this paper, a low power compact 64-point processor for 802.11p is designed through the analysis of the characteristics of FFT algorithm. The block floating-point operations and single butterfly parallel structure are used and greatly improves the operation accuracy and operation speed of the FFT processor.