Location-aware adaptation and precoding for low complexity IR-UWB receivers

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.