SCP Enabled Navigation Using Signals of Opportunity in GPS Obstructed Environments

Abstract

Spectral Compression Positioning™ (SCP) is an innovative method for deriving positioning, navigation, and timing (PNT) information from Signals of Opportunity (SoOps). The method enables precise PNT in GNSS obstructed environments providing expanded coverage, reliability, and accuracy. This paper introduces the core principles of SCP‐based PNT and explores both autonomous and network‐based implementation architectures. Providing precise, cost‐effective, and autonomous positioning information for navigating indoors or in GPS obstructed environments is a technical challenge that remains largely unsolved. Advances in hybrid Wi‐Fi/A‐GPS positioning and inertial technologies have yet to deliver meter‐level accuracy without the need for custom infrastructure or extensive RF fingerprinting. SCP technology offers a unique alternative approach to current RF‐based positioning techniques that readily exploits terrestrial and orbital Signals of Opportunity without the requirement for purpose built infrastructure or a priori knowledge of the signal source location and clock states.

Constructing a continuous phase time history from TDMA signals for opportunistic navigation

“…The illustration represents a fictitious scenario in which the measurements of φ r (t), represented by the solid black curves within each burst, suffer from no phase ambiguity. In reality, due to (1) the unavailability of carrier phase measurements between bursts, (2) the insensitivity of the phase discriminator to integer cycle offsets in phase, and, in some cases, (3) a random 1 M -cycle phase shift imposed by the transmitting system on the phase at the beginning of each burst, the actual measurements of φ r (t) are quite different from what is suggested by the solid curves in Fig. 1.…”

The Complexity Problem in Future Multisensor Navigation and Positioning Systems: A Modular Solution

“…Some examples include distance-measuring equipment (DME) for aviation, enhanced long-range navigation (ELoran) for marine navigation, Wi-Fi for indoor and urban positioning, and Locata for land surveying. By combining a broadband antenna with one or more tuneable front ends with variable sampling rates, it is possible to construct a single set of hardware that can operate with many different types of positioning signals and signals of opportunity (Mathews et al, 2011). This device could also be used to receive GNSS.…”

Evaluation of fingerprinting-based WiFi indoor localization coexisted with Bluetooth

“…Most research topics focus on highsensitivity GNSS (Syrjärinne, 2001), optical navigation systems (Mulloni et al, 2009, Rouzaud and Skaloud, 2011, Zhou et al, 2015, acoustic solutions (Priyantha et al, 2000, Jiang et al, 20150, WiFi (Bahl and Padmanabhan, 2000), Bluetooth (Pei et al, 2010a, Pei et al, 2010b, Pei et al, 2010c, Chen et al, 2011a, ZigBee (Sugano et al, 2006), Ultra Wide Band (Pahlavan et al, 2006), cellular networks (Syrjärinne, 2001), RFID (Hightower et al, 2000), magnetic localization (Storms, 2010), inertial measurement units (Foxlin, 2005 andChen et al, 2010), signals of opportunity (Mathews et al, 2011, Pei et al, 2016, dead reckoning approaches (Pei et al, 2011c, Qian et al, 2015a, Qian et al, 2015b, and also hybrid solutions , Pahlavan et al, 2010, Liu et al, 2010, Chen et al, 2011b, and Liu 2012a.…”