Abstract
In this paper, a low-complexity approach is proposed for the generation of power efficient impulse radio ultra-wide band (IR-UWB) waveforms. The proposed approach relies on the optimization of the pulse width to achieve the highest power efficiency while maintaining FCC-compliant pulse shapes. Analytical expressions are developed for the power efficiency of widely adopted UWB waveforms, namely Gaussian and sech basis waveforms. The proposed approach is verified analytically and compared to results obtained through other approaches in the literature. It is shown that using as low as a single first order derivative Gaussian or sech basis waveform, with optimized pulse width can result in power efficiency as high as 85%, an efficiency that is achieved by other approaches using linear combinations of as much as 33 basis waveforms. This represents the low-complexity advantage of the proposed approach, which makes it more practical for implementation.
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