Multipath Mitigation Technique Based on Partial Autocorrelation Function |
| |
Authors: | Z Zhang C L Law E Gunawan |
| |
Affiliation: | (1) PWTC, Research Techno Plaza, Level 4, School of EEE, Nanyang Technological University, Singapore, 637553, Singapore |
| |
Abstract: | GPS positioning accuracy in indoor and urban canyons environments is greatly affected by multipaths due to distortions in
its autocorrelation function. In this paper, the first sidelobe of Pseudorandom Noise (PN) code autocorrelation is studied
and a new multipath mitigation technique based on PN code autocorrelation function is presented. This new technique relies
on the detection of the partial autocorrelation function that is affected by multipath signals. The increase in fractional
delay of the line-of-sight (LOS) signal is calculated. Simulation results indicate that the proposed technique has superior
performance compared with the 0.1-chip-spacing narrow correlator on mitigating multipath signals, especially the short-delay
multipath signals.
Zhang Zhen obtained his Bachelor’s Degree from Beijing Information and Technology Institute in 1999, Master’s Degree from Tsinghua University,
Beijing China, in 2002. He now is a Ph.D. student in Nanyang Technological University. Currently he also works as a Research
Associate in the Positioning and Wireless Technology Center (PWTC), NTU. His research interest includes multipath mitigation
for GPS, software GPS receiver design, indoor GPS as well as Ultra Wide Band (UWB) based ranging systems.
C. L. Law is an Associate Professor in School of EEE, NTU and the Director of PWTC. Dr. Law’s current research area is in Wireless
Networks. His research topics are in microwave integrated circuits, indoor wireless channel modeling, analysis of indoor wireless
LAN performances and in techniques for overcoming the time-dispersion distortions in high speed wireless LAN.
E. Gunawan is an Associate Professor in School of EEE, NTU and his research interest includes Error Correction Codings, Modeling of
Cellular Communications Systems, Power Control for CDMA Cellular Systems, MAC Protocols, Multicarrier Modulations, Multiuser
Detections, Space-time Coding, Radio-location Systems, UWB and its applications for Human Body Vital Signs Detection, and
Powerline Communications. |
| |
Keywords: | navigation GPS multipath pseudorange autocorrelation |
本文献已被 SpringerLink 等数据库收录! |
|