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http://dx.doi.org/10.5762/KAIS.2013.14.11.5841

Effect of Doppler Bandwidth on the Performance of Channel Sounding  

Jo, Jun-Ho (Network Strategy BU, KT)
Choi, Seyeong (Dept. of Information & Communication Eng., Wonkwang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.11, 2013 , pp. 5841-5846 More about this Journal
Abstract
In this work, we consider the effect of doppler bandwidth on the performance of channel sounding. We develop the mathematical formulation of the problem and compare the MMSE channel estimator to the simple correlator. Examples of the performance of the MMSE and correlator estimators are presented for the single-input single-output (SISO) case with various values of Doppler bandwidth to assess the impact of time variation. The results show that as the $f_dT$ product increases the performance of both the MMSE and correlator estimates gets worse, and that the performance of the MMSE estimator improves relative to the correlator.We also consider case that the exact statistics of the channel are unknown It is shown that when the mismatch is not too large, the MMSE estimator with mismatch still does better than the simple correlator, but if the mismatch is large, then the correlator can do better.
Keywords
Channel Sounding; Doppler Bandwidth; MMSE; SISO;
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