Location-aware Adaptation and Precoding for Low Complexity IR-UWB Receivers
Heinrich Luecken, Thomas Zasowski, Christoph Steiner, Florian Trösch, and Armin Wittneben
IEEE International Conference on Ultra-Wideband, ICUWB 2008, Hanover, Germany, Vol. 3, pp. 31-34, Sept. 2008, (invited paper).
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An environment is considered with many low complexity
wireless mobile stations communicating to higher complexity
stationary cluster heads. The cluster heads can determine
the rough position of the mobile stations using geo-regioning. The
mobile stations are not able to perform a channel estimation
due to complexity reasons. We present two approaches to utilize
regional channel knowledge available at the cluster head for
improvement of the data detection performance at the mobile
station. First, by feeding back the average power delay profile of
the channel from the cluster head to the mobile station, the mobile
station can adapt a filter according to this information. Second, at
cluster head side the covariance matrix of the channel impulses
response vectors is used for precoding optimization. Based on
channel impulse responses measured in a realistic environment
the performance of both approaches is evaluated. Performance
gains of 1 to 3 dB compared to energy detection can be obtained.
UWB, Precoding, Noncoherent receivers, Geo-regioning
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