定位接收机码跟踪环路中的短多径抑制算法设计与实现

In recent years, as people\'s lives become more and more intelligent, the Location Based Service (LBS) has gradually become an indispensable key technology in people\'s daily life.However, compared to the outdoor environment, indoor environment is very complicated. In the transmission, signal will be affected by obstacles, and lead to signal reflection, refraction, diffraction and other phenomenon, making the signal through multiple paths, is transmitted to reach the receiver to different times and seriously affects the accuracy of indoor positioning. In this paper, we discuss the problem of TC-OFDM (time divided CDMA-OFDM superimposed signal system) short-delay multipath interference in the design of indoor positioning receiver based on the terrestrial broadcasting network. Because of the complexity of the indoor environment, the problem of multipath, especially the short-delay multipath, is particularly severe. So the positioning accuracy is reduced. In this paper, a new method of code loop phase discriminator is proposed through theoretical analysis and mathematical simulation, which is implemented on Matlab simulation. Compared with the existing mainstream code loop design, The new method of code loop phase discriminator can better mitigation short-delay multipath interference and effectively improve the positioning accuracy.