Radio link design of cellular land mobile communication systems

Hata, Masaharu; Kinoshita, K.; Hirade, K.

doi:10.1109/t-vt.1982.23909

Cited by 35 publications

(12 citation statements)

References 10 publications

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“…The complex envelope of the field component received with the polarization direction of the reception antenna (vertical polarization in our case) is given by (1) where and denote the and coordinate of the antenna position, respectively. The quantities and are the components of the th wave vector given by (2) where is the azimuth and is the elevation angle.…”

Section: Physical Modelmentioning

confidence: 99%

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High-resolution 3-D direction-of-arrival determination for urban mobile radio

Fuhl

Rossi

Bonek

1997

IEEE Trans. Antennas Propagat.

158

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The in-depth knowledge of the mobile radio channel is particularly important for radio communication modeling and advanced technology system design. We propose an accurate method to determine jointly azimuth and elevation angle and the delay of waves incoming at the receiver. The method is applied to measurements of the complex impulse response of the mobile radio channel, performed on a planar array placed on a mobile in an urban cellular environment. The directionsof-arrival (DOA) were obtained by the means of a recently presented direction finding algorithm-Two-Dimensional (2-D) Unitary ESPRIT. Two-dimensional spatial smoothing as an extension of ordinary spatial smoothing is utilized to decorrelate coherent waves. The application of 2-D Unitary ESPRIT increases the angular resolution over conventional Fourier analysis or the scattering function by an order of magnitude and overcomes difficulties due to secondary lobes. The time delay is determined from wideband channel sounder measurements. The results confirm some assumptions on propagation mechanisms: 1) The wave-guiding property of streets (canyon effect), which is especially pronounced for long-delayed paths; 2) the variation of the number of incoming waves with their excess delay-the larger the excess delay, the lower the number of paths comprising an echo in the power delay profile; 3) if a single path remains, the privileged DOA is the direction of the street; 4) the exponential part of the power delay profile due to scatterers all around the receiver; and 5) the elevation dependence of the impinging power. In the tested receiver locations, paths with elevations between 0 and 40 dominate, containing about 90% of the received power.

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Section: Physical Modelmentioning

confidence: 99%

“…Up until now, the most commonly used descriptions are narrowband path loss models [1] and/or wideband power delay profile measurements [2]. Additionally, the Doppler profile [3] or the scattering function [4] of the considered channel has to be determined to gain supplementary insight into the propagation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

High-resolution 3-D direction-of-arrival determination for urban mobile radio

Fuhl

Rossi

Bonek

1997

IEEE Trans. Antennas Propagat.

158

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“…Previous studies of the radio link design only have been focused on the transmission quality of the radio link [1]- [3], and it have not been focused on the channel capacity. Moreover, the link has been modeled by path loss and shadow component, ignoring Rayleigh component.…”

Section: Introductionmentioning

confidence: 99%

Capacity-based Link Design of MIMO Radio Systems

Yoshimoto

Hattori

2007

2007 4th International Symposium on Wireless Communication Systems

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This paper proposes a procedure of link design on MIMO cellular systems. Our approach is based on the channel capacity. We derive the capacity of single-user downlink channel which taking into account path loss, shadow fading, and Rayleigh fading. Based on the channel capacity, we give the relation between the area coverage and the reference CNR related to the margins into the radio link. With these relations, we determine the required transmission power to fulfill a service quality.

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“…An increasingly important communication system involves the use of radio links for the transmission of speech or data both to and from mobile vehicles, which could be taxis, buses, lorries, cars or trains [1][2][3][4][5][6][7][8][9][10][11][12]. With the development of very-large-scale integrated circuits for processing digital signals, it is now possible to implement highly sophisticated techniques of modulation, demodulation and detection for digital signals, not only cheaply but also in a very small size.…”

Section: Introductionmentioning

confidence: 99%

Digital modems for land mobile radio

Clark

1985

IEE Proc. F Commun. Radar Signal Process. UK

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The paper surveys the digital modulation methods available for use in land mobile radio systems. The modulation methods are compared on the basis of their relative tolerances to additive white Gaussian noise, and brief consideration is also given to the equipment complexities involved. The emphasis of the paper is on basic techniques and the essential mechanisms by which they operate, with a view to clarifying the factors that contribute to a good tolerance to noise. Prominence is given to constant-envelope signals, such as FSK, PSK and the various developments of these. Consideration is also given to the introduction of correlation or dependence between neighbouring signal elements, by means of partial-response or correlative-coding techniques, or else by means of convolutional codes, these being effective methods of improving the tolerance to additive noise. Coherent, incoherent and noncoherent detectors are discussed, together with threshold-level and maximumlikelihood detection. However, the topics of carrier-phase and element-timing synchronisation are not considered here, nor are any details given of the detection processes. Finally, a selection is made of the techniques that are potentially the most cost-effective for land mobile radio systems.

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Radio link design of cellular land mobile communication systems

Cited by 35 publications

References 10 publications

High-resolution 3-D direction-of-arrival determination for urban mobile radio

High-resolution 3-D direction-of-arrival determination for urban mobile radio

Capacity-based Link Design of MIMO Radio Systems

Digital modems for land mobile radio

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