Читать книгу Position, Navigation, and Timing Technologies in the 21st Century - Группа авторов - Страница 139

Chun Yang

Sigtem Technology Inc., United States

This chapter describes the available opportunistic terrestrial signals suitable for navigation, particularly digital television, requirements for their use, and implementations. General methods and practical constraints for obtaining position, navigation, and timing (PNT) solutions with broadcasting signals are first discussed in Section 40.1. Representative broadcasting signals are then presented in Section 40.2 with software receivers. The conversion of acquired broadcasting signals into pseudorange measurements is formulated in Section 40.3 with test data illustrations. Finally, an example of radio dead reckoning with mixed signals of opportunity (SOOP) is presented in Section 40.4 together with a discussion of important issues such as directions for future research.