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ULTRA-WIDE-BAND PROPAGATION CHANNELS

Platform : vlsi

IEEE Projects Years : 2005

This paper appears in: Vehicular Technology, IEEE Transactions on Issue Date: Sept. 2005 AIM: IMPLAMENTATION OF ULTRA-WIDE-BAND PROPAGATION CHANNELS VIA VHDL ABSTRACT This paper presents an overview of ultrawideband (UWB) propagation channels. It first demonstrates how the frequency selectivity of propagation processes causes fundamental differences between UWB channels and "conventional" (narrowband) channels. The concept of pathloss has to be modified, and the well-known WSSUS model is not applicable anymore. The paper also describes deterministic and stochastic models for UWB channels, identifies the key parameters for the description of delay dispersion, attenuation, and directional characterization, and surveys the typical parameter values that have been measured. Measurement techniques and methods for extracting model parameters are also different in UWB channels; for example, the concepts of narrowband channel parameter estimation (e.g., maximum-likelihood estimation) have to be modified. Finally, channel models also have an important impact on the performance evaluation of various UWB systems. LEARNING OBJECTIVE: To understand about ultra-wide-band propagation channels via VHDL INPUT: Data / information about ultra-wide-band propagation channels via VHDL OUTPUT : Simulated output of Coded ultra-wide-band propagation channels via VHDL APPLICATIONS: Very high speed integrated circuit hardware description language design, VLSI Design SOSFTWARE TOOL USED: XLINX81I

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