Research progress of multipath effect in GPS structural health monitoring

摘要

The Global Positioning System (GPS) is becoming an effective method of positioning and monitoring in real time with a high precision. However, due to the dominant GPS error source exists in the high-accuracy applications, multipath effects should be taken seriously. Several methods of multipath estimation and mitigation are investigated and discussed in detail. Then, it is found that the multipath cannot be removed completely and the residual may be so significant that cannot be ignored. Finally, the key and difficult problems in the future studies are pointed out.