1
S C I E N C E P A S S I O N T E C H N O L O G Y
u www.tugraz.at
Cognitive Radio and Location-Aware Wireless
Communications
16-3-2016 – Advanced SP Seminar, summer term 2016
Klaus Witrisal
2 2 5G Networks: higher capacity, lower latency, ultra-dense deployment
• 5G technologies: mm-wave; massive MIMO; small cells; D2D
Introduction
23-2-2016
Klaus Witrisal [Nokia Networks, “5G Use Cases and Requirements”, White Paper, 2014]
3 3 Notions of a cognitive radio Highly reliable communications
Efficient spectrum utilization
secondary users exploiting spectral holes
16-3-2016
Klaus Witrisal
4 4 Cognitive Radio borrowing principles from cognitive neuroscience
Perception-action cycle; memory (learning); attention
16-3-2016
Klaus Witrisal [S. Haykin, "Cognitive radio: brain-empowered wireless communications," IEEE JSAC, 2005.]
5 5 Location-awareness: many system parameters depend on the position
Introduction
23-2-2016
Klaus Witrisal [Di Taranto et al., “Location-Aware Communications for 5G Networks”, IEEE Signal Proc. Mag., Nov. 2014]
6 6 Multipath-assisted Indoor Navigation and Tracking
(MINT) – concept and geometric model
Idea:
exploit range/position
information from reflected
multipath
Benefits:
less anchor nodes;
more redundancy, i.e.
robustness in NLOS;
higher accuracy
Geometric model (GPEM):
virtual anchors (mirror
sources)
Multipath-assisted indoor positioning – theory and modeling
16-3-2016
[Meissner, Steiner, Witrisal, "UWB Positioning with Virtual Anchors
and Floor Plan Information," in WPNC, Dresden, March 2010.] Klaus Witrisal
7 7 Validation of the signal model – and prediction of the position error bound
Multipath-assisted indoor positioning – theory and modeling
16-3-2016
[Meissner, Witrisal, "Analysis of Position-Related Information in Measured UWB Indoor Channels," EUCAP 2012.]
[Meissner, "Multipath-Assisted Indoor Positioning," Ph.D. Thesis, Graz University of Technology, 2014.] Klaus Witrisal
8 8 Experimentation employing a lab-grade UWB channel sounder
Validation steps:
GSCM/GPEM-based simulation model measurement-based
analysis channel-sounder-based real-time implementation (2 anchors) (1 anchor)
Multipath-assisted indoor positioning – algorithms
16-3-2016
[Meissner, et al, "Real-Time Demonstration System for Multipath-Assisted
Indoor Navigation and Tracking (MINT)," IEEE ICC Workshops 2014. ] Klaus Witrisal
9 9 Admin Issues meetings: Wed. 11:00 – 12:15, IDEG 134
Presentations
Initial presentation: 5’ – 10’
Explain: motivation of the work; research hypothesis;
method used (how do the authors address the problem?)
Final presentation: 20’ – 30’
Review of motivation, hypothesis, method
Explain: implementation (modeling; derived analytical
results and conclusions); simulation/experimental
results; final conclusions drawn
Written short paper: ~2pg. IEEE double-column style
Follow the structure described above
16-3-2016
Klaus Witrisal
