Optimal integration time for energy-detection PPM UWB systems

Almodovar-Faria, Jose M.; McNair, Janise

doi:10.1109/glocom.2012.6503751

Cited by 2 publications

(2 citation statements)

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“…The "+" sign in (12) means that algebraic additions, so ζ, can take either positive or negative values. The effect of ζ on the quality of the system will be evaluated later.…”

Section: Proposal Of Uwb-ppm-atsmentioning

confidence: 99%

“…The proposed method reduced the impact of multiaccess interference (MAI) and significantly reduced the floor error compared to the orthogonal signal configuration at a large SNR ratio. Besides, there are several studies on improving the quality of the receiver for UWB-PPM signals [11], determining the optimal integration time for the energy detector of the UWB-PPM system [12], and developing a measurement matrix combined with randomly Fourier transform converters for UWB-PPM signals [13]. The combination of PPM symbols and time of arrival (TOA) estimation algorithm using the Sub-Nyquist IR-UWB signal in the IR-UWB device is discussed in [14].…”

Section: Introductionmentioning

confidence: 99%

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Proposal of UWB-PPM with Additional Time Shift for Positioning Technique in Nondestructive Environments

2020

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The ultra-wide band (UWB) technology has many advantages in positioning and measuring systems; however, powers of UWB signals rapidly reduce while traveling in propagation environments, hence detecting UWB signals are difficult. Various modulation techniques are applied for UWB signals to increase the ability for detecting the reflected signal from transmission mediums, such as pulse amplitude modulation (PAM), pulse position modulation (PPM), and so on. In this paper, we propose an ultra-wide band pulse position modulation technique with optimized additional time shift (UWB-PPM-ATS) to enhance the accuracy in locating buried object in nondestructive environments. Moreover, the Levenberg–Marquardt Fletcher algorithm (LMFA) is applied to determine the medium parameters and buried object location simultaneously. The influences of proposed modulation technique on determining system’s parameters, such as a propagation time, distance, and properties of the medium are analyzed. Calculation results indicate that the proposed UWB-PPM-ATS gives higher accuracy than the conventional one such as UWB-OOK and UWB-PPM in both homogeneous and heterogeneous environments. Furthermore, the LMFA with the proposed UWB-PPM-ATS outperforms the LMFA with the traditional modulation method, especially for unknown propagation environment.

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“…The "+" sign in (12) means that algebraic additions, so ζ, can take either positive or negative values. The effect of ζ on the quality of the system will be evaluated later.…”

Section: Proposal Of Uwb-ppm-atsmentioning

confidence: 99%