A comparison of two radio propagation channel impulse response determination techniques

Tholl, D.; Fattouche, M.; Builtitude, R.J.C.; Melancon, P.; Zaghloul, H.

doi:10.1109/8.220988

Cited by 22 publications

(11 citation statements)

References 3 publications

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“…For example, the frequency domain transfer function measurement system [28] using a network analyzer can be used to measure the transfer function of the time-varying filter with (2). It is also experimentally shown that results from frequency domain measurement are similar to those of traditional time-domain measurement approach that is based on a spread spectrum system with a sliding correlator at the receiver [52]. Representing the measured frequency responses (sampled transfer function) in terms of the suggested model of (2) will help address a lot of practical issues of this model for system design, such as spatially correlated impulse responses representing samples of the channel at close locations which may run into tens of thousands of impulse response profiles [10].…”

Section: Discussionmentioning

confidence: 93%

Multipath resolving with frequency dependence for wide-band wireless channel modeling

Qiu¹,

1999

IEEE Trans. Veh. Technol.

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Multiple ray paths are resolved using highresolution digital signal processing algorithms. The Cramer-Rao (CR) bound is used as a benchmark where a combination of the singular value decomposition method and the eigen-matrix pencil method is proven to be most successful. The conventional complex channel model for wireless propagation is extended to include the frequency-dependent feature of rays which can be used to classify the ray arrivals and provide physical insight of the channel. A novel complex-time model is used to approximate the suggested model. This approach is important to various applications such as equalizer, RAKE receiver, etc., in wireless communication systems. Five key features (noise immunity, robustness, resolution, accuracy, and physical insight) of the proposed algorithm are studied using numerical examples.

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Section: Discussionmentioning

confidence: 93%

Multipath resolving with frequency dependence for wide-band wireless channel modeling

Qiu¹,

1999

IEEE Trans. Veh. Technol.

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“…This technique is normally used to measure the frequency response of indoor radio channels, and is widely described in the literature [8], [14]- [16]. A block diagram of the channel sounder is given in Fig.…”

Section: A Measurement Hardwarementioning

confidence: 99%

Measurements and analysis of the indoor wideband millimeter wave wireless radio channel and frequency diversity characterization

Hammoudeh

Scammell

Sánchez

2003

IEEE Trans. Antennas Propagat.

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This paper presents results of frequency domain measurements conducted to evaluate the effectiveness of frequency diversity in mitigating the effects of multipath fading in indoor microcellular channels employing omni-directional receive antenna in the band 63.4-65.4 GHz. The performance of frequency diversity for 155 MHz and other channel bandwidths to accommodate modulated signals with data rates up to 155 Mb/s is presented. Results are obtained using maximum selection combining and presented as functions of frequency separation between the diversity branch signals. Improvement in the level crossing rate and average fade duration is given together with improvement in the -Rician factor. The root mean square (rms) delay spread ( rms ) and coherence bandwidth ( c ) of the channel are also presented as functions of distance between terminals. Values of c for correlation levels of 0.9, 0.7, and 0.5 are given together with the cumulative distribution functions of rms . The levels below which the coherence bandwidth stays for 90% of receiver positions are estimated. Measurements were repeated under identical test conditions but with the receive omni-directional antenna replaced by a directional horn in order to characterize the effect of the receive antenna radiation pattern on the indoor radio channel characteristics.Index Terms-Coherence bandwidth, diversity, indoor channel, millimeter wave, radio-wave propagation, RMS delay spread, wireless LAN.

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“…Die meßtechnische Ermittlung [13,14] der Kanalimpulsantwort geschieht mit dem Netzwerkanalysator HP 8720 A und zwei Discone-Antennen [15]. Die gemessene Kanalimpulsantwort wird durch inverse Fouriertransformation der komplexen Übertragungsfunktion in dem Frequenzbereich von 1,9 GHz bis 2,1 GHz und einer Schrittweite von 10 …”

Section: Kanalimpulsantwortunclassified

Modellierung und Messung der elektromagnetischen Wellenausbreitung in pikozellularen Funknetzen

Schoberl¹,

Schmitt²,

Rembold³

1997

Frequenz

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Übersicht:Eine frequenzökonomische und effiziente Planung von mobilen Funksystemen erfordert leistungsfähige Werkzeuge zur Modellierung der elektromagnetischen Wellenausbreitung. Für pikozellulare Funkzellen wird ein auf der verallgemeinerten geometrischen Beugungstheorie UTD basierendes Ausbreitungsmodell vorgestellt, das sich durch ein neuartiges Strahlsuchverfahren zur schnellen und geometrisch exakten Berechnung der Ausbreitungswege auszeichnet. Vergleiche von gemessenen und simulierten Ausbreitungsszenarien zeigen hohe Übereinstimmungen.Abstract:An efficient planning of mobile radio systems requires powerful tools for modeling the electromagnetic radio wave propagation. A propagation model for picocellular environments based on the uniform theory of diffraction UTD is proposed. The new ray tracing algorithm permits a fast and geometrical exact determination of the propagation paths. The comparison between calculated and measured path loss and channel impulse response show good agreements.Für die Dokumentation: Ray Tracing / Beugungstheorie / Wellenausbreitung / pikozellulare Funknetze / Feldstärkeprädiktion

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A comparison of two radio propagation channel impulse response determination techniques

Cited by 22 publications

References 3 publications

Multipath resolving with frequency dependence for wide-band wireless channel modeling

Multipath resolving with frequency dependence for wide-band wireless channel modeling

Measurements and analysis of the indoor wideband millimeter wave wireless radio channel and frequency diversity characterization

Modellierung und Messung der elektromagnetischen Wellenausbreitung in pikozellularen Funknetzen

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