Modeling and Characterization of the Wireless Channel

The performance of communication systems heavily depends on the channel over which communication takes place. In order to allow for an accurate performance prediction of these systems and the used algorithms, detailed knowledge about the channel is necessary. On the other hand, not all the details of the propagation environment are required: It should only contain the information relevant for a systematic design of the communication system and an evaluation of the algorithms. Thus, channel modeling is always the result of a trade-off between a detailed representation of the environment and mathematical tractability.

In order to gain access to realistic channel information, an extensive channel measurement campaign has been performed in cooperation with the Electronic Measurement Research Lab of the TU Ilmenau. The measurement campaign characterizes a typical multiuser and multicell MIMO wireless channel in an urban macro cell scenario for the Long Term Evolution (LTE) standard. Channel sounding has been conducted around 2.53 GHz in 2 bands of 45 MHz. Different base station positions and heights have been used to measure the MIMO channel on a multitude of mobile tracks, see Figure 1.

 

While wireless channel modeling has made significant progress in the past years, many channel properties of multiuser and multicell MIMO systems are still not properly captured. Examples are the inherent non-stationarity in time, frequency, and space of the channel as well as correlation properties of large scale channel parameters as, e.g., shadow fading. These aspects are, however, highly relevant for the design of wireless communication systems, especially in the context of cooperative networks. Identifying and analyzing the key characteristics of the wireless channel is the focus of this project.
 

Contact

Adrian Ispas

Publications

Zhang, D.: Iterative algorithms for achieving near-ML decoding performance in concatenated coding systems, Ph. D. Dissertation RWTH Aachen University, 2013


Guo, K. and Ascheid, G.: Performance Analysis of Multi-Cell MMSE Based Receivers in MU-MIMO Systems with Very Large Antenna Arrays, in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), pp. 3175 - 3179, Apr. 2013, ISSN: 1525-3511, 10.1109/WCNC.2013.6555070 ©2013 IEEE


Rákossy, Z. E., Naphade, T. and Chattopadhyay, A.: Design and Analysis of Layered Coarse-Grained Reconfigurable Architecture , in International Conference on ReConFigurable Computing and FPGAs (ReConFig)(Cancun, Mexico), Dec. 2012 ©2012 IEEE


Gong, X., Ispas, A. and Ascheid, G.: Outage-Constrained Power Control in Spectrum Sharing Systems with Partial Primary CSI, in Proceedings of IEEE Global Telecommunications Conference (GLOBECOM), 2012 ©2012 IEEE


Sheng, W., Wiebe, A., Stulova, A., Leupers, R., Kienhuis, B., Walters, J. and Ascheid, G.: FIFO Exploration in Mapping Streaming Applications onto the TI OMAP3530 Platform: Case Study and Optimizations, in IEEE 6th International Symposium on Embedded Multicore SoCs (MCSoC-12), Sep. 2012 ©2012 IEEE


Chattopadhyay, A., Khalid, A., Maitra, S. and Raizada , S.: Designing High-Throughput Hardware Accelerator for Stream Cipher HC-128, in International Symposium on Circuits and Systems (ISCAS 2012), May 20 -23, Seoul, Korea, pp. 1448 - 1451 , 2012, 10.1109/ISCAS.2012.6271518 ©2012 IEEE


Kempf, T., Ascheid, G. and Leupers, R.: Multiprocessor Systems on Chip: Design Space Exploration, Springer, Feb. 2011, ISBN: 978-1-44198-152-3, 10.1007/978-1-4419-8153-0


Ramakrishnan, V., Ascheid, G., Adrat, M. and Antweiler, M.: SISO and MIMO OFDM Physical Layer Algorithms on a Heterogeneous Multiprocessor Platform - Implementations and Mapping Exploration, in Software Defined Radio Technical Conference, 2011


Dawid, H. and Fettweis, G.: Bit--level Pipeline Divide Circuit and Method therefore, 1992


Leupers, R., Vajda, A., Bekooij, M., Ha, S., Doemer, R. and Nohl, A.: Programming MPSoC platforms: Road works ahead!, in Proc. of the Design, Automation and Test in Europe Conference and Exhibition (DATE 2009)(Nice, France), in Proc. of the Design, Automation and Test in Europe Conference and Exhibition (DATE 2009)(Nice, France), pp. pp. 1584-1589, 2009


Dartmann, G., Gong, X. and Ascheid, G.: Cooperative Beamforming with Multiple Base Station Assignment Based on Correlation Knowledge, in Proceedings of IEEE Vehicular Technology Conference (VTC-Fall)(Ottawa, Canada), Sep. 2010