地面数字电视信号与GPS相结合的定位系统

为了解决在城市楼宇间可见GPS卫星常常不足4颗而导致无法定位的问题,通过使用地面数字电视信号,实现了这种恶劣环境下的成功定位.而当GPS卫星数大干4颗时,利用数字地面电视信号可以改善GDOP,提高定位精度.介绍了系统的工作原理,通过计算机软件仿真实现了地面数字电视信号的模拟及单点和多点的移动定位,结果表明通过地面数字电视和GPS结合的定位系统可以提高定位精度,解决CPS卫星不足的问题.

Positioning System Using Digital Television Terrestrial Multimedia Broadcasting Signals and GPS Signals

In this paper a positioning system using digital television terrestrial multimedia broadcasting signals was introduced to solve the problem that observed GPS satellites are not enough between tall buildings.Also when the number of GPS satellites is more than four,digital television terrestrial multimedia broadcasting signals can be used to improve the GDOP provided by the GPS satellite constellation.Principal of the system was introduced and computer simulations were done to simulate the digital television ...