GPS World, February 2014
COVER STORY FIGURE 1 Overall system architecture for MUSTER Multi platform signal and trajectory estimation receiver Collaborative Signal Processing More Receiver Nodes Bring Ubiquitous Navigation Closer Encouraging results from new indoor tests and advances in collaborative phased arrays come from MUSTER multiple independently operating GPS receivers that exchange their signal and measurement data to enhance GNSS navigation in degraded signal environments such as urban canyons and indoors Andrey Soloviev and Jeffrey Dickman B ringing GNSS navigation further indoors by adding new users to a collaborative network can help realize the concept of ubiquitous navigation Increasing the number of receiver nodes to improve signal to noise ratios and positioning accuracy lies at the heart of the MUlti platform Signal and Trajectory Estimation Receiver MUSTER This article focuses on EHQH WV RI LQWHJUDWLQJ PXOWL QRGH receiver data at the level of signal processing considering two case studies Collaborative GNSS signal processing for recovery of attenuated signals and Use of multi node antenna arrays for interference mitigation MUSTER organizes individual receiver nodes into a collaborative network to enable Integration at the signal processing level including Multi platform signal tracking for processing of attenuated satellite signals Multi platform phased arrays for interference suppression Integration at the measurement level including Joint estimation of the receiver trajectory states position velocity and time and Multi platform integrity moni WRULQJ YLD LGHQWL FDWLRQ DQG exclusion of measurement failures To exclude a single point of failure the receiver network is implemented in a decentralized fashion Each receiver obtains GNSS signals and signal measurements code phase Doppler shift and carrier phase from other receivers via a communication link and uses these data to operate in a MUSTER mode that is to implement a multi platform signal fusion and navigation solution At the same time each receiver supplies other receivers in the network with its signal and measurement data FIGURE 1 illustrates the overall system architecture Open loop tracking is the key technological enabler for multinode signal processing Particularly MUSTER extends an open loop tracking concept that has been previously researched for single receivers to networked GNSS receivers Signals from multiple platforms are combined to construct a www gpsworld com February 2014 GPS World 27
You must have JavaScript enabled to view digital editions.
