Pulse propagation characteristics at 2.4 GHz inside buildings

Kim, Seong-Cheol; Bertoni, H.L.; Stern, M.

doi:10.1109/25.533773

Cited by 76 publications

(7 citation statements)

References 18 publications

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“…coherence lengths for the machine hall and the laboratory are summarized in Table I. Comparable values were also achieved in [21] and [23]. Intersymbol interference can be avoided if the symbol rate is chosen less than the minimum coherence bandwidth of approximately 7 MHz.…”

Section: Indoor Radio Channel Characterizationmentioning

confidence: 95%

“…For indoor radio channel characterization, i.e., path loss and static/dynamic multipath propagation behavior, extensive work has already been carried out, especially in the 2.45-GHz band [20]- [24]. The static frequency-selective wideband channel is commonly characterized by the coherence bandwidth , which can either be determined with a network analyzer measurement of the transfer function in the frequency domain [21], [22], [24] or, alternatively, a time-domain measurement of the time-invariant impulse response with a channel sounder [23]. Channel sounders are normally also the means of choice for the measurement of a time-variant impulse response , where stands for the time variation of the system.…”

Section: Indoor Radio Channel Characterizationmentioning

confidence: 99%

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Modular Wireless Real-Time Sensor/Actuator Network for Factory Automation Applications

Körber

Wattar

Scholl

2007

IEEE Trans. Ind. Inf.

109

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Modern factory facilities are characterized by highly flexible manufacturing cells and highly dynamic processes, where clusters of fixed or moving sensors and actuators have to be controlled in a limited space under stringent real-time and reliability constraints. In such demanding industrial environments, wireless systems can also be beneficial by improving flexibility, cutting cables, and enabling solutions, which are cumbersome or even not possible to realize with wireline systems, especially in controlling moving or rotating parts. In this paper, we present a conceptual study of a wireless real-time system dedicated for remote sensor/actuator control in production automation. System development is based on user requirements, which were extracted from customer interviews and a market research. Low level measurements of frequency-and space-selective wireless channels in a factory-like environment were carried out. System design aspects, i.e., network topology, multiple access schemes, and radio technologies, will be thoroughly reviewed. The performance of a first prototype implementation will be discussed with emphasis on timing behavior and power consumption, as sensors and actuators of the wireless system are intended to operate without power lines or batteries.Index Terms-Factory automation systems, multipath radio propagation, real-time communications, wireless sensor/actuator network.

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Section: Indoor Radio Channel Characterizationmentioning

confidence: 95%

Section: Indoor Radio Channel Characterizationmentioning

confidence: 99%

Modular Wireless Real-Time Sensor/Actuator Network for Factory Automation Applications

Körber

Wattar

Scholl

2007

IEEE Trans. Ind. Inf.

109

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show abstract

“…The parameter that can be used to evaluate precisely the time distortion of a wideband signal transmitted through the radio channel is the coherence bandwidth of the channel. It can be defined [9][10][11][15][16][17] as the frequency separation ∆f at which the absolute of the channel frequency correlation function R h that can be calculated via the Fourier Transform as:…”

Section: Indoor Propagation Channel Modelingmentioning

confidence: 99%

“…Special challenge is modeling indoor radio channels, which is the issue of many research papers, e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Naturally, the development and minimization of computers make the wireless local-area networks or wireless internet much more demanding in a sense of the need for much higher data rates than it was at the beginning.…”

Section: Introductionmentioning

confidence: 99%

Propagation Measurements at 2.4 GHz Inside a University Building and Estimation of Saleh- Valenzuela Parameters

Blazevic

Zanchi

Marinović

2007

JCOMSS

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In this paper we analyze measurements conducted in an indoor environment of our university building at a centralfrequency of 2.4 GHz in terms of the Saleh-Valenzuela channel. The channel parameters are extrapolated by processing the power-delay profiles measured by a vector network analyzer. Final adjustments of the parameters are obtained by comparison of simulated and measured delay-spread cumulative density functions, where a quite good agreement between the two is obtained. The predictions of the coherence bandwidth are satisfactory as well. We also considered some extensions to the original form of the model and concluded that the one that would be worthy to apply is the one that, besides temporal, incorporates also spatial information about the channel, whereas other modifications are found to be unnecessary or even unjustified for evaluation of this indoor propagation scenario.

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“…However, they tend rather to focus on a single characteristic, e.g. pulse propagation characteristic, as in [4], or temporal fading caused by motion of people and other objects within the channel [5], or simply deal with different frequency bands, like in [6]. In this paper, we present measurement results for the three major channel characteristics in the 2.4 GHz ISM band, i.e.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the indoor radio propagation channel at 2.4 GHz

Wysocki,

Zepernick

2000

JTIT

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The unlicensed industrial, scientific, and medical (ISM) band at 2.4 GHz has gained increased attention recently due to the high data rate communication systems developed to operate in this band. The paper presents measurement results of fading characteristics, multipath parameters and background interference for these frequencies. Some statistical analysis of the measured data is presented. The paper provides information that may be useful in design and deployment of communication systems operating in the 2.4 GHz ISM band, like those compliant with IEEE 802.11 standard and Bluetooth open wireless standard

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Pulse propagation characteristics at 2.4 GHz inside buildings

Cited by 76 publications

References 18 publications

Modular Wireless Real-Time Sensor/Actuator Network for Factory Automation Applications

Modular Wireless Real-Time Sensor/Actuator Network for Factory Automation Applications

Propagation Measurements at 2.4 GHz Inside a University Building and Estimation of Saleh- Valenzuela Parameters

Characterization of the indoor radio propagation channel at 2.4 GHz

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