Channel Estimation with Lowpass Filter for UTRA FDD Downlink

Authors: J. Rinas, K. Knoche, K.-D. Kammeyer
Abstract: This paper introduces a new Channel Estimation
(CE) filter called Polyphase Lowpass-Interpolation
(PLI)-filter for downlink coherent Rake-combining in a DSCDMA
mobile environment. In this case some UTRA FDD
scenarios are taken for showing the feasibility of this approach.
It uses known periodically time-multiplexed pilot
symbols for interpolating the channel coefficients in between.
The idea of this approach is to find a compromise
between noise reduction and adaptation to the time variant
channel coefficients using a Remez lowpass design. This is
paid by the use of at least six pilot sequences resulting in a
three slot delay. Some simulation results of this PLI-filter
compared with other well known CE-filters are presented.
Document type: Journal Paper
Publication: February 2002
Journal: European Wireless 2002
Pages: 440–444
Volume: 1
Index: 189
EuWireless_2002_knoche.pdf484 KB
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