USB信号相位解调器的改进设计  

Improved Design of a USB Phase Demodulator

作　　者：梁昊[1] 赵琦[1] 刘曦[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电讯技术》2012年第11期1787-1790,共4页Telecommunication Engineering

摘　　要：针对研制USB相位解调系统中出现的除0问题和ROM容量限制问题,通过研究坐标旋转数字计算(Coordinate Rotation Digital Computer,CORDIC)方法,实现了基于CORDIC算法的反正切模块,并利用此模块设计了一种针对统一S频段(Unified S Band,USB)系统的相位解调器。仿真实验结果证明,这种相位解调器能够较好地解决上述问题。另外,设计了一种通用型带通滤波器,用于USB基带信号中副载波和各测距音分量的分离滤波。For the problem of dividing zero and ROM capacity limitation during the development of the Unified S Band（USB） phase demodulation system, through the study of CORDIC（Coordinate Rotation Digital Computer） algorithm, an arctangent module based on CORDIC algorithm is realized. By using this module, a phase demodulator for the USB system is designed. The simulation result shows that the two above-mentioned problems can be solved well. Besides, a band-pass filter for dividing the subcarriers of the USB signal is designed.

关 键 词：统一S频段系统 应答机 相位解调 坐标旋转数字计算方法 带通滤波器 

分 类 号：TN911.72[电子电信—通信与信息系统]