卫星导航基带二次载波剥离跟踪技术  

Technology of Second Carrier Discards Tracking for Satellite Navigation Base-Band

作　　者：钟小敏[1] 刘敏行 ZHONG Xiaomin;LIU Minxing

机构地区：[1]中国电子科技集团公司第二十研究所 [2]解放军95827部队

出　　处：《现代导航》2016年第6期401-404,共4页Modern Navigation

摘　　要：针对现代卫星导航接收机及OEM板低功耗、待机长等需求,本文提出一种卫星导航基带二次载波剥离跟踪技术。首先剥离原始中频,然后对残余载波进行跟踪。该技术可大幅度降低基带数据速率,减小数据量,在FPGA上实现时,复用单个跟踪通道即可完成对16颗卫星信号的实时跟踪。实验结果表明,二次载波剥离跟踪技术较传统跟踪技术节省了30%的硬件资源,且可达到以下性能指标:跟踪灵敏度-139d Bm,伪距测量精度0.5m,载波相位精度0.01m。For the demand of low power and long standby in modern satellite navigation receiver and OEM board, a new technology of second carrier discard tracking for satellite navigation base-band is presented in this paper. Firstly, the original mid-frequency was discarded, and then the remaining carriers are tracked. The technology can greatly reduced the rate and sum of the base-band data. On FPGA realization, one tracking channel can track 16 satellites at the same time. The experimental result proves that the second carrier discard tracking technology can save 30% resources compare with the traditional tracking technology,it can achieve the following performance index: tracking sensitivity to 139dBm, the measure precision of pseudo-range to 0.5m, the precision of carrier phase to 0.01m.

关 键 词：二次载波剥离 FPGA 跟踪 OEM板 

分 类 号：TN967[电子电信—信号与信息处理]