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International Journal of Antennas and Propagation
Volume 2014, Article ID 317683, 16 pages
http://dx.doi.org/10.1155/2014/317683
Research Article

Real-Time MIMO Channel Sounder for Emulation of Distributed Ultrawideband Systems

Ilmenau University of Technology, PF 100565, 98684 Ilmenau, Germany

Received 20 March 2014; Accepted 14 August 2014; Published 15 September 2014

Academic Editor: Christoph F. Mecklenbräuker

Copyright © 2014 Rudolf Zetik et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper introduces an ultrawideband (UWB) channel sounding system. Its novel architecture allows real-time measurements of multiple time-variant radio propagation channels in different ultrawide frequency bands. Its architecture allows emulation of multiuser systems, sensor networks, localization systems, and distributed MIMO radar systems. The sounder uses a maximum length binary sequence (MLBS) excitation signal and correlation processing in the receiver. Its synchronous multichannel operation is supported by excellent timing stability and low power consumption of miniature size modules based upon custom integrated SiGe circuits. The paper describes the architecture, design, calibration, basic parameters, and application examples of the sounding system.