Patent
Method and apparatus for performing beam searching in a radio communication system
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TLDR
In this article, a radio communication system includes a base station having a directional antenna for generating a plurality of beams, which are used to receive signals which are decoded at the base station.Abstract:
A radio communication system includes a base station having a directional antenna for generating a plurality of beams. A first set of the beams is used to receive signals which are decoded at the base station. A second set of the beams is used for interrogating a cell to identify beams which should be added to the first set of beams (for example, in response to mobile terminals entering the cell). In one embodiment, the second set of beams comprises a plurality of searcher beams produced by a fixed-beam phased array antenna. In a second embodiment, the second set of beams comprises a single searcher beam which is scanned through the cell by an adaptive phased array antenna. The radio communication system can be used to communicate with indoor mobile terminals through a plurality of radio heads, and also can be used to communicate with orbiting satellites.read more
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References
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Patent
Base station antenna arrangement
Jeffrey Graham Searle,Stuart James Dean,Keith Roy Broome,Peter John Chrystie,Christopher Richard Cox +4 more
TL;DR: In this article, an antenna arrangement for a cellular radio base station is provided with a plurality of r.f. transceivers, including one or more antenna arrays (12) each comprising a pluralityof sub-arrays (20) each selectively operable to form a beam in azimuth.
Journal ArticleDOI
The performance enhancement of multibeam adaptive base-station antennas for cellular land mobile radio systems
TL;DR: In this paper, a multiple-beam adaptive base station antenna is proposed as a major system component in an attempt to solve the problem of meeting the proliferating demands for mobile telephony within the confinement of the limited radio spectrum allocated to these services.
Patent
Dual distributed antenna system
TL;DR: In this article, a distributed antenna system (30, 35) is utilized in a communication system for providing multipath signals which facilitate signal diversity for enhanced system performance, where each node (200) of the antenna system comprises more than one antenna (196).
Journal ArticleDOI
Signal acquisition and tracking with adaptive arrays in the digital mobile radio system IS-54 with flat fading
TL;DR: In this paper, the performance of the least-mean-square (LMS) and direct matrix inversion (DMI) algorithms in the North American digital mobile radio system IS-54 was investigated.
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Adaptive channel allocation method and apparatus for multi-slot, multi-carrier communication system
TL;DR: In this paper, a method and system of adaptive channel allocation in a multi-carrier, multi-slot system (220) is provided, where a subset of M channels is chosen from a larger set of N channels available for communications on a link.