J. Nuckelt

Publications (3)0 Total impact

• Conference Proceeding: Linear Diversity Combining Techniques Employed in Car-to-X Communication Systems

  J. Nuckelt, H. Hoffmann, M. Schack, T. Kurner
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  ABSTRACT: This paper presents performance evaluation results of different linear diversity combining techniques that have been applied to IEEE 802.11p based Car-to-X (C2X) communication systems. More precisely, we employed the Selection Combining (SC), the Equal Gain Combining (EGC) and the Maximum Ratio Combining (MRC) algorithms to systems with multiple receiver antennas and compared the resulting performance to that of single-receive antenna systems. Concerning the great challenges of typical C2X propagation channels that go along with a strong time variance and long multipath delays, the use of multiple receive antennas in combination with adequate signal combining algorithms can clearly improve the reliability of the communication system even under poor Signal-to-Noise Ratio (SNR) conditions. Based on physical (PHY) layer simulations, the achieved performance of different diversity combining techniques has been evaluated using stochastic models of double-selective fading channels.
  Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd; 06/2011
• Conference Proceeding: Comparison of path loss measurements and predictions at urban crossroads for C2C communications

  M. Schack, J. Nuckelt, R. Geise, L. Thiele, T. Kurner
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  ABSTRACT: The signal-to-noise ratio (SNR) available at the receiver significantly affects the performance of Car-to-Car (C2C) communication systems. Thus, accurate models to predict the path loss, in particular for non-line-of-sight (NLOS) scenarios, are essential for the development of C2C systems. Since deterministic models are very time-consuming, also fast-computable stochastic models are of great interest. This paper focuses on the radio propagation for C2C communications at urban crossroads under NLOS conditions. 3D ray-optical path loss predictions are compared with narrow-band measurements at 5.9 GHz. Furthermore, a stochastic propagation model that can be used to estimate maximum communication distances for different data rates is derived.
  Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on; 05/2011
• Source

  Available from: adv-radio-sci.net

  Article: Deterministic and stochastic channel models implemented in a physical layer simulator for Car-to-X communications

  J Nuckelt, M Schack, T Urner
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  ABSTRACT: This paper presents a physical (PHY) layer sim-ulator of the IEEE 802.11p standard for Wireless Access in Vehicular Environments (WAVE). This simulator allows the emulation of data transmission via different radio chan-nels as well as the analysis of the resulting system behav-ior. The PHY layer simulator is part of an integrated sim-ulation platform including a traffic model to generate re-alistic mobility of vehicles and a 3D ray-optical model to calculate the multipath propagation channel between trans-mitter and receiver. Besides deterministic channel model-ing by means of ray-optical modeling, the simulator can also be used with stochastic channel models of typical vehicular scenarios. With the aid of this PHY layer simulator and the integrated channel models, the resulting performance of the system in terms of bit and packet error rates of different re-ceiver designs can be analyzed in order to achieve a robust data transmission.
  01/2011; 9:165-171.