UWB Impulse Radio Receiver Based on Single Bit Quantization |
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Authors: | John Nielsen |
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Affiliation: | (1) Department of Electrical and Computer Engineering, University of Calgary, 2500 Univ. Dr., N.W., Calgary, AB, Canada, T2N-1N4 |
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Abstract: | Impulse Radio (IR) modulation is perceived to be a practical means of exploiting the multi-gigahertz bandwidth available for
UWB links. However, the RMS delay spreading of indoor channels relative to the transmitted pulse width is typically very large
such that several hundred signal samples are required to be quantized and processed for each received pulse. To realize a
relatively low power low-complexity receiver of satisfactory performance in low signal to noise ratio environments, signal
sampling based on single bit quantization is proposed which is readily realizable at gigahertz rates with modest power consumption.
In this paper, the architecture and performance of a coherent IR receiver based on single bit quantization will be analyzed
from the perspectives of Rake receiver processing, channel estimation and signal detection. This paper demonstrates that single
bit quantization results in a modest manageable performance penalty relative to linear multi-bit sampling. This penalty is
readily justifiable in light of the significant reduction in overall receiver complexity. |
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Keywords: | channel estimation detection Impulse Radio IR matched filter MRC Rake receiver quantization UWB Ultra-Wideband |
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