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Sensors 2010, 10(12), 11038-11063; doi:10.3390/s101211038
Article

Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors

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Received: 20 October 2010; in revised form: 25 November 2010 / Accepted: 27 November 2010 / Published: 6 December 2010
(This article belongs to the Section Physical Sensors)
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Abstract: Ultra-wideband impulse radio (UWB-IR) sensors should comply entirely with the regulatory spectral limits for elegant coexistence. Under this premise, it is desirable for UWB pulses to improve frequency utilization to guarantee the transmission reliability. Meanwhile, orthogonal waveform division multiple-access (WDMA) is significant to mitigate mutual interferences in UWB sensor networks. Motivated by the considerations, we suggest in this paper a low complexity pulse forming technique, and its efficient implementation on DSP is investigated. The UWB pulse is derived preliminarily with the objective of minimizing the mean square error (MSE) between designed power spectrum density (PSD) and the emission mask. Subsequently, this pulse is iteratively modified until its PSD completely conforms to spectral constraints. The orthogonal restriction is then analyzed and different algorithms have been presented. Simulation demonstrates that our technique can produce UWB waveforms with frequency utilization far surpassing the other existing signals under arbitrary spectral mask conditions. Compared to other orthogonality design schemes, the designed pulses can maintain mutual orthogonality without any penalty on frequency utilization, and hence, are much superior in a WDMA network, especially with synchronization deviations.
Keywords: UWB-IR sensors; waveform design; orthogonality; waveform division multiple access UWB-IR sensors; waveform design; orthogonality; waveform division multiple access
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Li, B.; Zhou, Z.; Zou, W.; Li, D.; Zhao, C. Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors. Sensors 2010, 10, 11038-11063.

AMA Style

Li B, Zhou Z, Zou W, Li D, Zhao C. Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors. Sensors. 2010; 10(12):11038-11063.

Chicago/Turabian Style

Li, Bin; Zhou, Zheng; Zou, Weixia; Li, Dejian; Zhao, Chong. 2010. "Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors." Sensors 10, no. 12: 11038-11063.



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