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Development and Performance Analysis of a Real Time High-Resolution Channel Sounder – IF Stage

Ferreira, D. ; Caldeirinha, Rafael

Development and Performance Analysis of a Real Time High-Resolution Channel Sounder – IF Stage, Proc Conf. on Telecommunications - ConfTele, Lisbon, Portugal, Vol. 1, pp. 1 - 4, April, 2011.

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Abstract
This paper presents an intermediate frequency (IF)
stage of a swept time delayed cross-correlation (STDCC) channel
sounder. The proposed topology employs the real-time sliding
correlation technique of pseudo-random (PN) sequences,
enabling amplitude and Doppler spectrum measurements and
analysis of multipath components. It makes use of recent
technologies, specifically in the generation and transmission of
PN sequences, which allows for an easy adjustment of the main
specifications of the sounder. The system presented here has been
tested and validated by using a PN sequence at 1GHz chip rate,
which allows for a time-delay resolution of consecutive multipath
components of 2ns. The dynamic range at the IF stage’s input
was measured to be around 40 to 50 dB. The results presented
are also compared with the VNA frequency sweep method.