卫星导航接收机中载波和码NCO的研究与实现  

Research and implementation of the carrier and code NCO in a satellite navigation

作　　者：曹广利[1] 宋茂忠[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《应用科技》2012年第1期1-4,共4页Applied Science and Technology

基　　金：航空科学基金资助项目(20095152026)

摘　　要：载波和码数控振荡器(NCO)是卫星导航接收机中的重要组成部分.论述了卫星导航接收机中载波和码NCO的组成、工作原理和作用,根据工程实现的要求确定了基本参数和基本结构,NCO相位累加器的位数N为32,利用verilog HDL语言在Quartus II 9.1中具体实现了载波和码NCO的设计,利用ModelSim6.3g完成了载波和码NCO的仿真,并在现场可编程逻辑器件(FPGA)中进行了下载实现.设计的载波和码NCO已应用于某具体接收机中,通过仿真和接收机测试,验证了设计的载波和码NCO性能满足卫星导航接收机的要求.The carrier and code NCO （numerically controlled oscillator） is an important part of satellite navigation receiver. The architecture, principle and fimction of the carrier and code NCO in satellite navigation receiver are described. According to the requirements of project implementation, the basic parameters and configuration are given, and N which is the phase accumulator bits of NCO is 32. By using the Quartus II 9.1 and ModelSim6.3g development tools and the field programmable gate army （FPGA） in verilog HDL, the design and simulation of the carrier and code NCO is implemented. By the procedure simulating and actual receiver testing, it is shown that the design of the carrier and code NCO meets the requirement of the satellite navigation receiver.

关 键 词：卫星导航 接收机 载波NCO 码NCO 现场可编程逻辑器件 

分 类 号：TN96[电子电信—信号与信息处理]