基于北斗RDSS的GPS区域差分技术

本文提出了一种基于北斗RDSS的GPS区域差分技术的实现方案，该方案克服了差分GPS技术受到参考站和用户站之间距离的限制。本系统中基准型GPS接收机伪距修正数的计算、用户接收机导航解算所需的卫星星历数据、时间数据、伪距信息和伪距修正数的提取以及差分算法实现和接收机定位算法全部在DSP＋FPGA中实现。通过试验数据分析比较可见，采用基于北斗RDSS的GPS区域差分技术，对GPS导航定位精度有明显提高，该技术为未来实现高精度GPS导航定位有一定的参考价值。

Regional Differential GPS Technique Based on COMPASS RDSS

An implementation method of regional differential GPS technique based on COMPASS RDSS is presented. Comparing with differential GPS technology, it provides a solution to distance between reference station and user station. Calculating pseudorange corrections of a reference GPS receiver, ephemeris data, time data, pseudorange information and corrections extraction required for users＇ receiver navigation solution, along with differential algorithm and receiver position algorithm can all be performed in DSP and FPGA. The analysis and comparison of experimental results show that use of regional differential GPS technique based on COMPASS RDSS can significantly increase GPS navigation positioning accuracy. It would facilitate high-accuracy GPS navigation positioning of the future.