Understanding the ultra-wideband channel within a computer chassis Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/794081260

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  • Recent developments in computing technology have generated a demand for more streamlined and effective test systems. By replacing traditional in-chassis wired interconnects with a broadcast wireless system, fault detection and error susceptibility will drastically improve, input/output capabilities will expand, and routing complexity will decrease. Ultra-wideband impulse radio's (UWB-IR) characteristic multipath-immunity and free-licensed spectrum makes it ideal for use in this scenario. Understanding the unique and complex communications channel within the confines of a computer is vital to any future system implementation. A comprehensive measurement campaign is mounted with the goal of thoroughly characterizing this channel. A UWB channel model specifying channel impulse response (CIR), path loss, and fading characteristics is derived and presented in enough detail to be used as a guide for future channel modeling endeavors. Analysis of this model provides a baseline for a proof-of-concept communications system consisting of a UWB pulser and receiver, which are implemented on printed circuit board (PCB) to decrease prototyping costs. These devices are then implemented within the channel of interest to find a UWB pulse response. The pulse response measurement is a simple experiment which takes into account the pulse distortion and delay spread shortening effects of UWB antennas and in-channel radiating interference, which are not apparent in the traditional channel model. The comprehensive model is then used to determine any issues that may arise during the conversion from wired to wireless interconnects among a computer's integrated circuits (IC).
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