The contents of the latest issue of: International Journal of Embedded and Real-Time Communication Systems (IJERTCS) Official Publication of the Information Resources Management Association Volume 3, Issue 3, July- September 2012 Published: Quarterly in Print and Electronically ISSN: 1947-3176 EISSN: 1947-3184 Published by IGI Publishing, Hershey-New York, USA www.igi-global.com/ijertcs Editor-in-Chief: Seppo Virtanen, University of Turku, Finland Guest Editorial Preface Special Issue on Positioning Technologies Jari Nurmi, Tampere University of Technology, Finland Elena-Simona Lohan, Tampere University of Technology, Finland Stephan Sand, German Aerospace Center (DLR), Germany John Raquet, Air Force Institute of Technology, USA To view the preface, please click on the link below. http://www.igi-global.com/Files/Ancillary/febcd1bc-fe11-4196-8f67-c13d356b94cc_1947-3176_3_3_Preface.pdf PAPER ONE Recent Trends in Interference Mitigation and Spoofing Detection Fabio Dovis (Politecnico di Torino, Italy) Luciano Musumeci (Politecnico di Torino, Italy) Nicola Linty (Politecnico di Torino, Italy) Marco Pini (Istituto Superiore Mario Boella, Italy) This paper gives a classification of intentional and unintentional threats, such as interference, jamming and spoofing, and discusses some of the recent trends concerning techniques for their detection and mitigation. Despite the fact that these phenomena have been studied since the early stages of Global Positioning System (GPS), they were mainly addressed for military applications of Global Navigation Satellite Systems (GNSS). However, a wide range of recent civil applications related to user’s safety or featuring financial implications would be deeply affected by interfering or spoofing signals intentionally created. For such a reason, added value processing algorithms are being studied and designed, in order to improve accuracy and robustness of the receiver and to assure the reliability of the estimated position and time solution. To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/recent-trends-interference-mitigation-spoofing/68994 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68994 PAPER TWO Challenges in Channel Measurement and Modeling for RF Localization Inside the Human Body Kaveh Pahlavan (Worcester Polytechnic Institute, USA) Yunxing Ye (Worcester Polytechnic Institute, USA) Ruijun Fu (Worcester Polytechnic Institute, USA) Umair Khan (Worcester Polytechnic Institute, USA) In this invited paper, the authors introduce an overview of the fundamentals of radio frequency (RF) channel measurement and modeling techniques needed for localization inside the human body. To address these fundamentals, the authors use capsule endoscopy as an example application. The authors first provide the results of the Cramer Rao Lower Bound (CRLB) for received signal strength (RSS) based endoscopy capsule localization, inside the human body, using existing path-loss models for radio propagation. Then challenges demanding further research are highlighted for attaining more precise localization using the time-of-arrival (TOA) based ranging techniques. To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/challenges-channel-measurement-modeling-localization/68995 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68995 PAPER THREE Theoretical Analysis of Overlay GNSS Receiver Effects Alexander Rügamer (Fraunhofer IIS, Germany) Cécile Mongrédien (Fraunhofer IIS, Germany) Santiago Urquijo (Fraunhofer IIS, Germany) Günter Rohmer (Fraunhofer IIS, Germany) Having given a short overview of GNSS signals and state-of-the-art multi-band front-end architectures, this paper presents a novel contribution to efficient multi-band GNSS reception. A general overlay based front-end architecture is introduced that enables the joint reception of two signals broadcast in separate frequency bands, sharing just one common baseband stage. The consequences of this overlay are analyzed for both signal and noise components. Signal overlay is shown to have a negligible impact on signal quality. It is shown that the noise floor superposition results in non-negligible degradations. However, it is also demonstrated that these degradations can be minimized by judiciously setting the relative gain between the two signal paths. As an illustration, the analytical optimal path-control expression to combine overlaid signals in an ionospheric-free pseudorange is derived for both Cramér-Rao Lower Bound and practical code tracking parameters. Finally, some practical overlay receiver and path control aspects are discussed. To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/theoretical-analysis-overlay-gnss-receiver/68996 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68996 PAPER FOUR Motion Restricted Information Filter for Indoor Bluetooth Positioning Liang Chen (Finnish Geodetic Institute, Finland) Heidi Kuusniemi (Finnish Geodetic Institute, Finland) Yuwei Chen (Finnish Geodetic Institute, Finland) Ling Pei (Finnish Geodetic Institute, Finland) Tuomo Kröger (Finnish Geodetic Institute, Finland) Ruizhi Chen (Finnish Geodetic Institute, Finland) This paper studies wireless positioning using a network of Bluetooth signals. Fingerprints of received signal strength indicators (RSSI) are used for localization. Due to the relatively long interval between the available consecutive Bluetooth signal strength measurements, the authors propose a method of information filtering with speed detection, which combines the estimation information from the RSSI measurements with the prior information from the motion model. Speed detection is further assisted to correct the outliers of position estimation. The field tests show that the new algorithm proposed applying information filter with speed detection improves the horizontal positioning accuracy of indoor navigation with about 17% compared to the static fingerprinting positioning method, achieving a 4.2 m positioning accuracy on the average, and about 16% improvement compared to the point Kalman filter. To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/motion-restricted-information-filter-indoor/68997 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68997 PAPER FIVE A Simulation Tool for Real-Time Hybrid-Cooperative Positioning Algorithms Francesco Sottile (Istituto Superiore Mario Boella, Italy) Mauricio A. Caceres (Istituto Superiore Mario Boella, Italy) Maurizio A. Spirito (Istituto Superiore Mario Boella, Italy) The authors propose a simulation tool (ST) able to test real-time hybrid GNSS/terrestrial and cooperative positioning algorithms that fuse both pseudorange measurements from satellites and terrestrial range measurements based on radio frequency communication performed between nodes of a wireless network. In particular, the ST simulates devices belonging to a peer-to-peer (P2P) wireless network where peers, equipped also with a GNSS receiver, cooperate among them by exchanging aiding data in order to improve both positioning accuracy and availability. Furthermore, the authors propose a method to increase the robustness of cooperative algorithms based on the estimated position covariance matrix. In particular, the proposed approach assures a faster estimation convergence and improved accuracy while lowering computational complexity and network traffic. Finally, the authors tested the sensitivity of the implemented positioning algorithms through the ST in two different scenarios, first in presence of high level of pseudorange noise and then in presence of a malicious peer in the P2P network. To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/simulation-tool-real-time-hybrid/68998 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68998 PAPER SIX International Conference on Localization and Global Navigation Satellite Systems 2011 Jari Nurmi (Tampere University of Technology, Finland) Elena-Simona Lohan (Tampere University of Technology, Finland) Stephan Sand (German Aerospace Center (DLR), Germany) To obtain a copy of the entire article, click on the link below. http://www.igi-global.com/article/international-conference-localization-global-navigation/68999 To read a PDF sample of this article, please visit http://www.igi-global.com/viewtitlesample.aspx?id=68999 ***************************************************** For full copies of the above articles, check for this issue of the International Journal of Embedded and Real-Time Communication Systems (IJERTCS) in your institution's library. This journal is also included in the IGI Global aggregated "InfoSci-Journals" database: http://www.igi-global.com/EResources/InfoSciJournals.aspx. ***************************************************** CALL FOR PAPERS Mission of IJERTCS: The mission of the International Journal of Embedded and Real-Time Communication Systems (IJERTCS) is to disseminate recent advancements and innovations in this interdisciplinary research area for field researchers, practitioners, scientists, academicians, students, and IT professionals. IJERTCS focuses on overcoming challenges involved in the rapid development of embedded communication systems towards feature-rich multimedia computers Coverage of IJERTCS: The International Journal of Embedded and Real-Time Communication Systems (IJERTCS) extensively covers research in the area of embedded and real-time communication systems. Within this field, topics to be discussed in the journal include (but are not limited to) the following: Asynchronous and synchronous circuit techniques Design methods Embedded networks (built-in networks in embedded communication devices) Emerging new topics Fault-tolerant hardware and software technologies Formal design and verification methods Hardware and software solutions for protocol processing Hardware and software solutions for real-time systems Hardware platforms and technologies Hardware/software co-design Modeling and verification methods On-chip communication in SoC and NoC OWA (open wireless architecture) Performance modeling Platform based design Real-time computing Reconfigurable systems Security issues and technologies Single-chip SDR (software defined radio) solutions Software design Testing techniques Interested authors should consult the journal's manuscript submission guidelines at www.igi-global.com/ijertcs All inquiries and submissions should be sent to: Editor-in-Chief: Seppo Virtanen at seppo.virtanen@utu.fi