A study of transmitted pulse waveforms on indoor infrared wireless communications via diffuse links

Sato, Akira; Ohtsuki, Tomoaki; Uehara, Hiroki; Sasase, Iwao

doi:10.1002/(sici)1520-6424(200009)83:9<33::aid-ecja4>3.0.co;2-m

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…There are several types of pulse shape available for UWB applications, such as square, triangle, cosine, root-raised cosine, sinc, Gaussian, monocycle, doublet, etc. [17][18][19][20][21][22]. The monocycle is the first derivative of Gaussian pulse and the doublet pulse consists of two Gaussian pulses with opposite polarity separated by some delay.…”

Section: Pulse Shapes For Uwb Applicationsmentioning

confidence: 99%

“…In addition, a Gaussian pulse is more effective in reducing the effect of inter symbol interference compared with root-raised cosine. When the average transmitted signal power is constant, a Gaussian pulse has larger energy per pulse than a root-raised cosine pulse; thus, it is more effective in improving the BER performance in the power limited wireless communication [20]. Therefore, Gaussian and its derivative are commonly used for UWB applications.…”

Section: Pulse Shapes For Uwb Applicationsmentioning

confidence: 99%

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Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Zhang

El-Gamel

Bayoumi

2008

Circuit Theory & Apps

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SUMMARYGaussian pulse is widely used in communication systems. The true Gaussian function is not physically realizable, but it can be approximated through linear functions. This paper presents a Gaussian pulse approximation approach to generate a quasi-Gaussian pulse by using the transient response of a CMOS inverter. The basic structure of the proposed design includes a digital variable square pulse generator, a Gaussian pulse generator and a small antenna model. The digital variable square pulse generator makes the amplitude and width of the generated quasi-Gaussian pulse tunable. The proposed pulse generator works well for three different electrical small antenna models. The simulation results show that the generated pulse approximates the Gaussian shape very well and the radiated signal at the antennas is compliant with the Federal Communication Commission's spectral mask for the 0-960 MHz band. The simple structure of this Gaussian pulse generator lends itself to a low-power, single-chip UWB transceiver solution.

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Section: Pulse Shapes For Uwb Applicationsmentioning

confidence: 99%

Section: Pulse Shapes For Uwb Applicationsmentioning

confidence: 99%

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Zhang

El-Gamel

Bayoumi

2008

Circuit Theory & Apps

View full text Add to dashboard Cite

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A physical model of the wireless infrared communication channel

Jungnickel

Pohl

Nonnig

et al. 2002

IEEE J. Select. Areas Commun.

210

114

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A simple analytical model of the wireless infrared communication channel in indoor environments is presented. The infrared signal is modeled as the combination of a diffuse component and a line-of-sight (LOS) or direct component. For the diffuse component alone, the properties of the channel are found using Ulbricht's integrating sphere. When a LOS component is also present, the transfer function depends upon the Rician factor K given by the ratio of the electrical power in the LOS and diffuse signals after the detector. For small K, the transfer function shows notches down to low frequencies, but due to the nature of light never for zero frequency. We confirm that a K-factor >or=13 dB is required also in infrared wireless links in order to support distortionless data transmission beyond 100 Mbit/s. Increasing the directivity at the receiver and/or at the transmitter improves the effective value of K. Here, we show that a moderate directivity will be sufficient for high-speed infrared communication in typical indoor scenarios

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Influence of ISI on synchronous OCDMA system using an optical ZCZ sequence set on a diffuse channel

Matsumoto

Ohira

Torii

et al. 2017

2017 Eighth International Workshop on Signal Design and Its Applications in Communications (IWSDA)

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A study of transmitted pulse waveforms on indoor infrared wireless communications via diffuse links

Cited by 3 publications

References 9 publications

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

A physical model of the wireless infrared communication channel

Influence of ISI on synchronous OCDMA system using an optical ZCZ sequence set on a diffuse channel

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