Effect of Amplitude Scintillations on the Tracking Error of IRNSS Receiver for Indoor Navigation Applications

Indoor navigation has become increasingly important for various applications such as emergency services and consumer devices. The performance of Indian Regional Navigation Satellite System (IRNSS) receiver degrades in indoor environment due to attenuation of signal levels in addition to ionospheric scintillations. For indoor navigation applications such as position finding in a multi-story building, the effect of scintillation may result in the loss of lock signal rather than reduced accuracy. The objective of this paper is to investigate the effect of ionospheric scintillations on IRNSS receiver performance for indoor navigation by estimating the receiver phase lock loop (PLL) and Delay locked loop (DLL) tracking error variance iitter). Our initial results indicate that severe scintillation could cause loss of lock.