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Wideband radio channel measurement system at 2 GHz

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6 Author(s)
J. Kivinen ; Radio Lab., Helsinki Univ. of Technol., Espoo, Finland ; T. O. Korhonen ; P. Aikio ; R. Gruber
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This paper describes the wideband radio channel sounding techniques for mobile radio channel measurements. Implementation of the cross-correlation method using both a sliding correlator and a matched filter detector is presented. Limitations and accuracy of radio channel measurements are discussed. Typically, delay resolution of about 20 ns is achieved with 100 MHz bandwidth. With a sliding correlator, a dynamic range of 25 dB was obtained with maximum Doppler bandwidth of 25 Hz and maximum excess delay of 19 μs. Digital matched filtering with a maximum sampling rate of 125 MHz can be used in real-time measurements with Doppler shifts of several kilohertz and 30 dB dynamic range. Using matched filter deconvolution as a resolution enhancement technique is discussed. Examples of the time-variant complex impulse response measurements are given

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:48 ,  Issue: 1 )