基于CORDIC算法的QAM调制器的FPGA实现  

Implementation of Multi-mode QAM Modulator on FPGA Based on CORDIC Algorithm

作　　者：徐小峰[1] 唐治德[1] 邓玉娟[2] 赵毅[1] 黄立华[1] 

机构地区：[1]重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]重庆大学自动化学院,重庆400044

出　　处：《通信技术》2008年第9期9-11,共3页Communications Technology

摘　　要：正交振幅调制技术(QAM)作为一种频带利用率较高、误码率相对较低的调制方式,被定义为很多数字通信系统的数字传输标准。QAM调制的载波信号一般采用查找表的方法,为了达到高精度的要求,需要耗费大量的ROM资源。文中提出了一种基于流水线CORDIC的算法实现QAM调制,可有效节省硬件资源,提高运算速度,同时可以实现多制式的QAM调制。最后给出了该设计方案的仿真结果,仿真结果表明,QAM调制器能产生四种调制方式的QAM信号,性能良好,达到设计的要求。QAM modulation is widely used in various digital transmissions. The common approach to implement carrier signal of QAM is based on a look-up table which requires a huge volume of ROM. This paper puts forward a pipelined architecture for implementation of QAM on FPGA based on CORDIC algorithm, and can save considerable hardware resources and improve the speed performance as well. Finally, the simulation result of this design indicates that the QAM modulator can generate four kinds of QAM signal, is of good performance and reaches the expected design requirements.

关 键 词：正交振幅调制技术 流水线 坐标旋转数字计算算法 现场可编程逻辑门阵列 

分 类 号：TN914[电子电信—通信与信息系统]