Ch 38. Navigation with Cellular Signals of Opportunity

Overview

This chapter discusses how cellular signals could be used for PNT by presenting relevant signal models, receiver architectures, PNT sources of error and corresponding models, navigation frameworks, and experimental results. The remainder of this chapter is organized as follows. Section 38.2 gives a brief overview of the evolution of cellular systems. Section 38.3 discusses modeling the clock error dynamics to facilitate estimating the unknown BTSs’ clock error states. Section 38.4 describes two frameworks for navigation in cellular environments. Sections 38.5 and 38.6 discuss how to navigate with cellular code‐division multiple access (CDMA) and LTE signals, respectively. Section 38.7 discusses a timing error that arises in cellular networks: clock bias discrepancy between different sectors of a BTS cell. Section 38.8 highlights the achieved navigation solution improvement upon fusing cellular signals with GNSS signals. Section 38.9 describes how cellular signals could be used to aid an INS.