3mm线性调频源线性度实时数字校正技术研究  

Digital Real-time Correction Algorithm of Linearity for 3 mm Linear Frequency-modulated Source

作　　者：李师波[1] 赵建中[1] 吴文[1] 

机构地区：[1]南京理工大学制导技术研究所,江苏南京210094

出　　处：《南京理工大学学报》2005年第2期166-168,177,共4页Journal of Nanjing University of Science and Technology

摘　　要：该文理论推导了针对3mm波段线性调频连续波信号源高线性度的校正方法,提出了实时数字式闭环线性校正方案,解决了可编程逻辑器件(FPGA)实现中遇到的精度和时间变量2个关键问题,完成了VHDL语言的软件设计;通过计算机软件进行了基于FPGA的功能仿真。结果表明:该数字校正网络具有实现方便、校正后线性度高达0 .2 4‰和具有较好的实时处理能力的特点;The correction algorithm of linearity is studied and a digital real-time closed-loop correction algorithm of linearity scheme is presented for a high linearity 3 mm LFMCW(Linear frequency-modulated continuous wave) signal source. The two key problems of the precision and the time variable,met in the solution with FPGA(Field programmable gate array), are solved; the VHDL software is designed and simulated with FPGA by computer. The results prove the feasibility of the correction algorithm with FPGA and show that: using this theme, the system is more simple, the linearity after correction algorithm of linearity arrives at 0.24 ‰ and the system is more real-time than those using traditional analog scheme.

关 键 词：线性调频连续波 线性度校正 可编程逻辑器件 毫米波 

分 类 号：TN958[电子电信—信号与信息处理]