David Matolak - Academia.edu (original) (raw)
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Papers by David Matolak
2014 IEEE/AIAA 33rd Digital Avionics Systems Conference (DASC), 2014
Vehicle-to-vehicle (V2V) communications have received increasing attention lately, but there is a... more Vehicle-to-vehicle (V2V) communications have received increasing attention lately, but there is a lack of reported results regarding important quantities such as path loss. This paper presents parameterized path loss models for V2V communications based on extensive sets of measurement data collected mainly under line-of-sight conditions in four different propagation environments: highway, rural, urban, and suburban. The results show that the path loss exponent is low for V2V communications, i.e., path loss slowly increases with increasing distance. We compare our results to those previously reported and find that, while they confirm some of the earlier work, there are also differences that motivate the need for further studies.
IEEE Vehicular Technology Magazine, 2015
Near-ground wireless channels are becoming increasingly important for a number of applications. I... more Near-ground wireless channels are becoming increasingly important for a number of applications. In this paper we add to the body of work on this topic, by quantifying small-scale near-ground channel fading characteristics in indoor environments, at 5 GHz. Results for delay spreads, multipath component persistence, and amplitude fading are used to develop models for this channel. As expected, the near-ground channel can yield more dispersion and deeper fading than its counterpart with elevated antennas.
ABSTRACT The choice of duplexing, multiplexing, and multiple access (D/M/MA) schemes defines impo... more ABSTRACT The choice of duplexing, multiplexing, and multiple access (D/M/MA) schemes defines important network characteristics at the physical and higher layers. Yet direct comparisons of available techniques are rare. Here we first analyze a simple 2-node network to illustrate some fundamental relationships among D/M/MA schemes, and then describe comparisons of orthogonal (no-interference) D/M/MA schemes in mesh and relay networks. We show that the choice of techniques can have significant effects upon system performance, including range and throughput, and that continuous single-carrier waveforms are superior to bursted multi-carrier waveforms. We extend the relay analysis to the realistic case that reuses time or frequency resources, taking into account inter-node interference (INI); this yields a useful relation for relay re-use design.
2014 IEEE/AIAA 33rd Digital Avionics Systems Conference (DASC), 2014
Vehicle-to-vehicle (V2V) communications have received increasing attention lately, but there is a... more Vehicle-to-vehicle (V2V) communications have received increasing attention lately, but there is a lack of reported results regarding important quantities such as path loss. This paper presents parameterized path loss models for V2V communications based on extensive sets of measurement data collected mainly under line-of-sight conditions in four different propagation environments: highway, rural, urban, and suburban. The results show that the path loss exponent is low for V2V communications, i.e., path loss slowly increases with increasing distance. We compare our results to those previously reported and find that, while they confirm some of the earlier work, there are also differences that motivate the need for further studies.
IEEE Vehicular Technology Magazine, 2015
Near-ground wireless channels are becoming increasingly important for a number of applications. I... more Near-ground wireless channels are becoming increasingly important for a number of applications. In this paper we add to the body of work on this topic, by quantifying small-scale near-ground channel fading characteristics in indoor environments, at 5 GHz. Results for delay spreads, multipath component persistence, and amplitude fading are used to develop models for this channel. As expected, the near-ground channel can yield more dispersion and deeper fading than its counterpart with elevated antennas.
ABSTRACT The choice of duplexing, multiplexing, and multiple access (D/M/MA) schemes defines impo... more ABSTRACT The choice of duplexing, multiplexing, and multiple access (D/M/MA) schemes defines important network characteristics at the physical and higher layers. Yet direct comparisons of available techniques are rare. Here we first analyze a simple 2-node network to illustrate some fundamental relationships among D/M/MA schemes, and then describe comparisons of orthogonal (no-interference) D/M/MA schemes in mesh and relay networks. We show that the choice of techniques can have significant effects upon system performance, including range and throughput, and that continuous single-carrier waveforms are superior to bursted multi-carrier waveforms. We extend the relay analysis to the realistic case that reuses time or frequency resources, taking into account inter-node interference (INI); this yields a useful relation for relay re-use design.