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In this paper a novel link adaptation algorithm is proposed that is capable of adjusting the transmit power level and the data rate jointly to the radio channel conditions. The proposed method relies solely on link quality information available at the transmitter by employing the reception or non-reception of the acknowledgment frames as a measure of the(More)
In this paper an algorithm and rst results from our investigations in automatically learning pronunciation variations from speech data are presented. Pronunciation dictionaries establish an important feature in state-of-the-art speech recognition systems. In most systems only simple dictionaries containing the canonical pronunciation forms are implemented.(More)
Space-time receivers for wireless communication systems offer the possibility to have both TX-and RX-antennas. For a realistic simulation of such systems, a multiple input multiple output (MIMO) spatial channel model is required which reasonably characterizes the space-and time-variant effects of the mobile radio channel. This paper describes a space-time(More)
The high random and sequential I/O requirements of contemplated workloads could serve as impetus to move faster towards storage-class memory (SCM), a technology that will blur the distinction between memory and storage. On the other hand, the volume of digital data being produced is increasing at an ever accelerating pace. Recent technology demonstrations(More)
We examine the issue of scaling magnetic tape-recording to higher areal densities, focusing on the challenges of achieving 100 Gb/in 2 in the linear tape format. The current highest achieved areal density demonstrations of 6.7 Gb/in 2 in the linear tape and 23.0 Gb/in 2 in the helical scan format provide a reference for this assessment. We argue that(More)
IBMS is a concept for future mobile communication systems to provide a large range of data rates with different degrees of mobility. The integration of heterogeneous services and communication systems requires a common Network Access and Connectivity CHannel (NACCH) for basic signaling to provide permanent network access. Smart Antennas are utilized to(More)
Timing-based servo signals, which are read back from dedicated servo patterns on tape to generate estimates for the operation of reel-to-reel and track-follow servomechanisms, are characterized by a first-order position jitter noise and pulse-width variation noise model. A method for the identification of servo signal parameters and the evaluation of the(More)
— The simulation of wireless communication systems with multiple antennas requires a spatial channel model which reasonably characterizes the space and time variant effects of the mobile radio channel. This paper describes a vector channel model with stochastic fading simulation, which combines several advantages from purely stochastic and geometrical(More)