227-0439-00L  Wireless Access Systems

SemesterAutumn Semester 2014
LecturersA. Wittneben
Periodicityyearly recurring course
Language of instructionEnglish


AbstractThe term wireless communications merges a large number of very different systems. This lecture allows a broad overview over current and future wireless communication systems and the implementation of fundamental principles of wireless communications. In parallel, market analyses shall help to measure the state of the art of these systems with respect to production, development and research.
ObjectiveWireless access systems support locally constrained tetherless connectivity and mobile access to a backbone network (typically the Internet). A variety of fascinating new applications are enabled if we succeed in providing mobile wireless connectivity to heterogeneous nodes (including RFID enabled objects, sensors and actors as well as computers and other power devices). We refer to this breed of networks as pervasive wireless access networks. In this course the student develops a comprehensive understanding of pervasive wireless access technology, existing markets and upcoming business opportunities.
Content1. Introduction: Wireless Access Systems, Fundamental problems in wireless communications, fading, spectral efficiency, interference, diversity, MIMO, spectrum allocation.
2. Wireless Local Area Network (WLAN): WLAN standards, network structures, physical layer (FHSS, DSSS, OFDM, Baseband Impulse Radio),MAC layer (DCF, CSMA/CA , PCF, MAC encryption)
3. Radio Frequency Identification (RFID): Fundamental principles, classification (passive, active, semi-active, semi-passive RFID, frequency ranges), RFID reader, RFID tag, far and near field technologies, inductive systems, load modulation, backscatter systems, anti-collision protocols,
4. Bluetooth: Piconet, master-slave principle, scatternet, protocols, link controller, synchronization, packet types
5. Ultra-Wideband (UWB): Regulations, fundamental principles, classification, application, UWB channel model, pulse transmission (UWB-IR), multiband transmission (UWB-MB), Pulse Position Modulation (PPM), Pulse Amplitude Modulation (PAM), Direct Sequence Spread Spectrum (DSSS), Time-Hopping (TH), UWB-MB OFDM, UWB-MB Impulse Radio, Matched Filter (MF), RAKE, Maximum Ratio Combining (MRC), Transmitted Reference (TR), Energy Detector, antenna design, localization
Lecture notesLecture Slides
LiteratureSelected Books
Prerequisites / NoticeRequirements: Knowledge of fundamental principles from Kommunikationssysteme and Übertragungstechnik I is helpful but not mandatory. Lecture is given in English.