Title :
A Solution to Refining Precision of Pseudo-range for Real-Time Software-Defined GPS Receiver
Author :
Jian, Liu ; Ke, Wang ; Wei, Chen ; Tao, Xie ; Xiaole, Zhang
Author_Institution :
Sch. of Inf. Eng., Wuhan Univ. of Technol., Wuhan
Abstract :
In this paper, a novel design of refining precision of pseudo-range is presented and ameliorates the pseudo-range degradation in a scheme of reducing local code replicas´ adjustment for real time software GPS receiver. The code phase error corresponding to pseudo-range degradation is estimated and compensated by linear interpolation and curve fitting, according to the discriminator output in delay locked loop (DLL). The final pseudo-range precision is validated by simulating and is improved to 2.827 meters with a position error about 8 meters.
Keywords :
Global Positioning System; curve fitting; interpolation; radio receivers; real-time systems; software radio; code phase error; curve fitting; delay locked loop; discriminator output; distance 8 m; linear interpolation; local code replicas´ adjustment; pseudo-range degradation; real-time software-defined GPS receiver; Curve fitting; Degradation; Delay effects; Delay estimation; Global Positioning System; Interpolation; Low pass filters; Phase estimation; Sampling methods; Tracking loops; delay locked loop; interpolations and curve fitting; pseudo-range precision; real time software GPS receiver;
Conference_Titel :
Communications and Mobile Computing, 2009. CMC '09. WRI International Conference on
Conference_Location :
Yunnan
Print_ISBN :
978-0-7695-3501-2
DOI :
10.1109/CMC.2009.201
