GPS导航程序FPGA设计说明

FPGA 源程序介绍 上海宇志通信技术有限公司 2009 年 5 月 8 日 目 录 一、总体构成...................................................................................................................................3 二、基带 AD 数据采样...................................................................................................................4 三、载波 NCO 产生模块 ................................................................................................................4 四、码 NCO 产生模块 ....................................................................................................................5 五、复相位旋转数字下变频模块...................................................................................................6 六、本地扩频码产生模块...............................................................................................................7 1、GPS CA 码产生模块............................................................................................................7 七、相关器模块...............................................................................................................................8 1、GPS 相关器模块..................................................................................................................9 八、时基产生模块.........................................................................................................................10 九、GPS帧同步产生模块 ............................................................................................................11 十、串口收发模块.........................................................................................................................15 十一、射频频综 SPI 配置模块.....................................................................................................16 十二、FPGA 与 DSP总线通讯接口 ..............................................................................................