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Showing papers on "Base station published in 1974"


Journal ArticleDOI
William C. Y. Lee1, Y. Yeh
TL;DR: A new parameter, duration of stay, is defined which appears to be insensitive to the granular variations of the mean signal strength and would be helpful in the determination of the switching rate in a base station diversity system.
Abstract: It is observed that the estimation of mean signal strength in the mobile radio environment has inherent uncertainties. These may not influence the observed distribution of the mean signal strength but would certainly mask efforts to obtain level crossing rates and duration of fades. A new parameter, duration of stay, is defined which appears to be insensitive to the granular variations of the mean signal strength and would be helpful in the determination of the switching rate in a base station diversity system.

100 citations


Journal ArticleDOI
D.O. Reudink1
TL;DR: In this article, the spatial description of the field impinging upon a mobile radio antenna is derived and the power spectrum and other properties of the signal envelope are considered, and large scale variations of the average signal are discussed.
Abstract: This paper begins with a discussion of multipath interference. The spatial description of the field impinging upon a mobile radio antenna is derived and the power spectrum and other properties of the signal envelope are considered. Next, large scale variations of the average signal are discussed. Measurements of observed attenuation on mobile paths over both smooth and irregular terrain are summarized. The paper concludes with a discussion of methods of predicting the area of coverage from a base station.

73 citations


Patent
Kazuo Imaseki1
28 Mar 1974
TL;DR: In this article, a channel switching device for use in a mobile radio communication system is disclosed, which is intended to use in systems wherein the service area is divided into a plurality of zones each having a fixed base station and each accommodating a majority of mobile stations.
Abstract: A channel switching device for use in a mobile radio communication system is disclosed. The device is intended for use in systems wherein the service area is divided into a plurality of zones each having a fixed base station and each accommodating a plurality of mobile stations. The base stations have a plurality of frequency-divided communication channels exclusively assigned to them. The mobile stations are provided with a detector and a switching circuit which are responsive to the received signal to controllably switch between channels. When the received signal exceeds a predetermined threshold, only the channels assigned to the zone in which the mobile station is located are selectively switched or scanned. On the other hand, when the received signal falls below the threshold, all the channels in the service area are scanned.

52 citations


Journal ArticleDOI
TL;DR: This paper reports some propagation and coverage prediction results using various models provided to the Federal Communications Commission, Spectrum Management Task Force.
Abstract: This paper reports some propagation and coverage prediction results using various models provided to the Federal Communications Commission, Spectrum Management Task Force.

9 citations