A new UWB pulse generator for FCC spectral masks

Parr, Andreas; Cho, B.L.; Ding, Zhi

doi:10.1109/vetecs.2003.1207105

Cited by 18 publications

(7 citation statements)

References 6 publications

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“…According to equation (8) The performance comparison between the wavelet-monocycle and several UWB monocycles proposed by some researchers is carried out. There are four monocycles: Gaussian monocycle [3], Scholtz's monocycle [4] and Brent Parr's monocycle [8]. Parameters comparison of monocycles is shown in table 1.…”

Section: Th-ppm Uwb System Optimizationmentioning

confidence: 99%

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Optimal Pulse Waveform Design for TH-PPM Ultra Wideband Systems

Liang

Zhou

2007

2007 IFIP International Conference on Wireless and Optical Communications Networks

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Ultra wideband (UWB) information is transmitted by a very short pulse which covers an extremely wide spectrum bandwidth. To avoid interference, pulse waveform design plays an important role in the UWB wireless systems. In this paper, an optimal pulse design method is proposed by using wavelet function in order to achieve optimal spectrum utilization, spectral mask compatibility, and coexistence with other wireless services. The UWB pulse waveform can be flexibly adjusted by this method to meet the different spectral masks, such as FCC mask and ETSI mask. The simulation results show that our design techniques provide pulse waveform with higher performance of time hopping pulse position modulation (TH-PPM) UWB system.

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Section: Th-ppm Uwb System Optimizationmentioning

confidence: 99%

“…However, they do not satisfy the spectral masks. In order to meet the FCC requirements, Brent Parr presented a UWB pulse generator in [8]. X. Wu proposed a filter design techniques by which optimal waveforms [9].…”

Section: Introductionmentioning

confidence: 99%

Optimal Pulse Waveform Design for TH-PPM Ultra Wideband Systems

Liang

Zhou

2007

2007 IFIP International Conference on Wireless and Optical Communications Networks

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“…However, filtering the pulse tends to lengthen the pulse duration. Thereby, it reduces the data rate and the system capacity [13] as well as causes an overlap of multi‐path components and lowers the diversity gain. On the other hand, applying a convolution window to the pulse tends to lengthen the bandwidth of the pulse.…”

Section: Introductionmentioning

confidence: 99%

Pulse design for ultra wideband impulse radio systems

Ling

Teo³

et al. 2014

IET Circuits, Devices & Systems

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In this study, the frequency spectrum of a pulse for ultra wideband impulse radio systems is assumed to be the frequency response of a real valued causal rational infinite impulse response (IIR) filter. This pulse design problem is formulated as a functional inequality constrained optimisation problem. The objective of this optimisation problem is to minimise the sum of the total passband and stopband ripple energy of the pulse. Also, the optimisation problem is subject to the stability condition of the IIR filter as well as to the specifications defined on both the maximum passband and stopband ripple magnitudes and that on the maximum time domain ripple magnitude of the pulse. If the feasible set of the optimisation problem is non-empty, then the designed pulse is guaranteed to be satisfied the specifications suggested by the Federal Communications Commission. Computer numerical simulation results show that the energy compaction performance defined in the frequency domain of the authors' designed pulse outperforms that of existing pulses. Since the frequency spectrum of the pulse is the same as the frequency response of the designed IIR filter, the pulse can be generated via an excitation of a simple circuit.

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“…Although the traditional Gaussian monocycle has been widely used in the early stages because of its simple realization, its frequency utilization is quite limited [ 8 ], so many publications have focused on this issue in recent years. In [ 9 , 10 ], Parr constructed an equivalent channel matrix from the sampled mask, and generated orthogonal UWB pulses from its dominant eigenvectors. However, the frequency utilization remains rather low, and the required 64 GHz sampling frequency makes it comparatively hard to implement.…”

Section: Introductionmentioning

confidence: 99%

Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors

Zhou

Zou

et al. 2010

Sensors

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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.

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A new UWB pulse generator for FCC spectral masks

Cited by 18 publications

References 6 publications

Optimal Pulse Waveform Design for TH-PPM Ultra Wideband Systems

Optimal Pulse Waveform Design for TH-PPM Ultra Wideband Systems

Pulse design for ultra wideband impulse radio systems

Optimal Waveforms Design for Ultra-Wideband Impulse Radio Sensors

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