Wideband characterisation of fading mobile radio channels

Parsons, J.D.; Bajwa, A.S.

doi:10.1049/ip-f-1.1982.0016

Cited by 43 publications

(31 citation statements)

References 8 publications

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“…For wideband radio channels, measurements (with a 10 MHz bandwidth centered at 1840 MHz) confirm that most of the received signal energy is concentrated in a small AOA region in rural, suburban, and even many urban environments [19]. In general, with wideband signaling, reflected signals are likely to arrive at the BS in a finite number of clusters, and the Gaussian wide sense stationary uncorrelated scattering (GWSSUS) model [20] is widely used to characterize this situation. An extension of GWSSUS to multiantenna AOA case is introduced in [21] and verified by field measurements.…”

Section: B Aoa Modeling For Macrocellmentioning

confidence: 99%

Hybrid TDOA/AOA mobile user location for wideband CDMA cellular systems

Zhuang

2002

IEEE Trans. Wireless Commun.

538

278

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Abstract-This paper proposes a mobile user location scheme for wideband code-division multiple-access (CDMA) wireless communication systems. To achieve high location accuracy and low cost of the mobile receiver, the location scheme combines the time difference of arrival (TDOA) measurements from the forward link pilot signals with the angle of arrival (AOA) measurement from the reverse link pilot signal. High chip rates in wideband CDMA systems facilitate accurate TDOA measurements, and a smart antenna used at the home base station (BS) can provide accurate AOA measurement in a macrocell environment. A two-step least square location estimator is developed based on a linear form of the AOA equation in the small error region. Numerical results demonstrate that the proposed hybrid TDOA/AOA location scheme gives much higher location accuracy than TDOA only location, when the number of base stations is small and/or when the TDOA measurements have a relatively poor accuracy.Index Terms-Angle of arrival, least square estimator, mobile user location, time difference of arrival, wideband code-division multiple-access.

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Section: B Aoa Modeling For Macrocellmentioning

confidence: 99%

Hybrid TDOA/AOA mobile user location for wideband CDMA cellular systems

Zhuang

2002

IEEE Trans. Wireless Commun.

538

278

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“…We considers pedestrian or fixed broadband access environments. According to [29], the channel can be considered as wide-sense stationary (WSS) as long as the mobile node moves within a range in the dimension of a few tens of the wavelength of the carrier signal, which corresponds to ∼ 10 m distance at 2.0 GHz carrier frequency. At pedestrian speed, if each scheduling slot is 1 ms, the channel can be considered as WSS in ∼ 10000 slots.…”

Section: Analysis Of Pfc Over a Rayleigh Flat Fading Channelmentioning

confidence: 99%

Relay-Assisted Transmission with Fairness Constraint for Cellular Networks

Liu

Zhang

Leung

2012

IEEE Trans. on Mobile Comput.

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Abstract-We consider the problem of relay-assisted transmission for cellular networks. In the considered system, a source node together with n relay nodes are selected in a proportionally fair (PF) manner to transmit to the base station (BS), which uses the maximal ratio combining (MRC) to combine the signals received from the source node in the first half slot and the n relay nodes in the second half slot for successful reception. The proposed algorithm incorporates the PF criterion and cooperative diversity, and is called proportionally fair cooperation (PFC). Compared with the proportional fair scheduling (PFS) algorithm, PFC provides improved efficiency and fairness.The ordinary differential equation (ODE) analysis used to study PFS cannot be used for PFC, otherwise one has to solve a large number of nonlinear and interrelated ODE equations which is time-prohibited. In this paper, we present a mathematical framework for the performance of PFC. The cornerstone of our framework is a realistic yet simple model that captures node cooperation, fading, and fair resource allocation-induced dependencies. We obtain analytical expressions for the throughput gain of PFC over traditional PFS without node cooperation. Compared with the highly time-consuming ordinary differential equation (ODE) analysis, our formulae are intuitive yet easy to evaluate numerically.To our knowledge, it is the first time that a closed-form expression is obtained for the throughput of relay-assisted transmission in a cellular network with the PF constraint.

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“…The propagation delay time measurement uses a channel sounder [10]. This channel sounder uses a sliding correlator on the receive side to detect the test station wave which is a transmitted wave having a 2.598 GHz center frequency and is a BPSK modulated, 30 Mbit/s, 10-stage M-ary sequential code.…”

Section: Overview Of the Measurement Techniquementioning

confidence: 99%

“…The arrival direction is specified by rotating a parabolic antenna on the receiving side. A channel sounder [10] for measuring the delay profile is used to measure the propagation delay time. Section 2 presents these measurements and clearly shows that the propagation paths of the primary received signal waves can be combinations of geometric optical reflections and diffractions near the corners of the intersections.…”

Section: Introductionmentioning

confidence: 99%

Identification of propagation path from low antenna height base station in urban area

Furuno

Taga

2001

Electron. Comm. Jpn. Pt. I

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SUMMARYThe delay spread characteristics in low antenna height propagation in urban areas are difficult to accurately estimate by statistical methods that are highly dependent on the location. To understand how the road system affects the propagation characteristics, the propagation mechanism was analyzed. In practice, the identification of the propagation paths has been attempted by measuring the direction of arrived waves and the delay propagation time (propagation path length) at line-of-sight and non-line-of-sight locations. The results clearly showed that many arrived waves are propagated by geometric optical reflections by the walls of buildings, diffractions at the corners of intersections, and their combinations. Furthermore, the calculated results and measurements were compared based on geometric optical methods and wedge diffraction theory to demonstrate the usefulness of geometric optical computational methods.

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Wideband characterisation of fading mobile radio channels

Cited by 43 publications

References 8 publications

Hybrid TDOA/AOA mobile user location for wideband CDMA cellular systems

Hybrid TDOA/AOA mobile user location for wideband CDMA cellular systems

Relay-Assisted Transmission with Fairness Constraint for Cellular Networks

Identification of propagation path from low antenna height base station in urban area

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