Patent
TDM-based fixed wireless loop system
Dan Avidor,Sanjay Kasturia,II Theodore Sizer,Reinaldo A. Valenzuela,Gregory Alan Wright +4 more
- 28 Oct 1997
131
TL;DR: In this paper, a time division multiple access (TDMA)-based fixed wireless loop system is described, where a cell controller associated with each base station allocates communication time slots so as to minimize mutual interference between base station/terminal links sharing the same time slot.
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Abstract: A time-division-multiplexed fixed wireless loop system and methods therefor are disclosed. The system comprises a plurality of cells each having a base station and a plurality of terminals. The base station includes a steerable and adjustable multibeam antenna for communicating with each of the terminals, which have fixed antennas. A cell controller associated with each base station allocates communication time slots so as to minimize mutual interference between base station/terminal links sharing the same time slot. Slot assignment is based on regional, periodically updated interference measurements that are stored in data bases.
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Citations
Patent
Ofdma with adaptive subcarrier-cluster configuration and selective loading
Xiaodong Li,Liu Hui,Kemin Li,Wenzhong Zhang +3 more
- 13 Dec 2001
TL;DR: In this paper, a method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described, which comprises allocating at least one diversity cluster of sub-carriers to a first subscriber and allocating a coherence cluster to a second subscriber.
445
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Power control with signal quality estimation for smart antenna communication systems
Louis C. Yun
- 03 Feb 1999
TL;DR: In this article, the authors proposed a method for ongoing power control for a communication station with a multiple antenna array, the power control using signal quality estimation applicable for angle modulated signals.
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Multi-carrier communications with adaptive cluster configuration and switching
Xiaodong Li,Hui Liu,Wenzhong Zhang,Kemin Li +3 more
- 13 Mar 2013
TL;DR: In this article, a method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described, which comprises allocating at least one diversity cluster of sub-carriers to a first subscriber and allocating a coherence cluster to a second subscriber.
246
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Russell Hoppenstein,Michael D. Thomas,Mano D. Judd +2 more
- 18 Sep 2002
TL;DR: A distributed antenna system comprising a plurality of antenna elements, duplexers and amplifiers, each amplifier and duplexer operatively coupled with one of said antenna elements and mounted closely adjacent to the associated antenna element in such a manner as incidences of insertion loss, noise and system failure are reduced as mentioned in this paper.
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Russell Hoppenstein
- 27 Sep 2002
TL;DR: In this paper, a predistortion linearization circuit is coupled to each power module to linearize the output of each antenna element of a distributed active antenna, which can be used to drive a parallel combination of power amplifiers.
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References
Beamforming: a versatile approach to spatial filtering
B.D. Van Veen,K.M. Buckley +1 more
TL;DR: An overview of beamforming from a signal-processing perspective is provided, with an emphasis on recent research.
4.5K
Patent
Spatial division multiple access wireless communication systems
Roy Richard H,Bjorn Ottersten +1 more
- 24 Nov 1992
TL;DR: In this paper, a method and apparatus for increasing the capacity and quality of wireless communication between a plurality of remote users and a base station is disclosed, where measurements from an array of receiving antennas at the base station are calculated and used to obtain the positions and velocities of the users.
564
Patent
Method and apparatus for determining the transmission data rate in a multi-user communication system
Gardner William R,Jacobs Paul E,Roberto Padovani,Noam A. Ziv,Katherine Lam,Andrew P. Dejaco +5 more
- 08 Sep 1994
TL;DR: In this paper, a method and apparatus for controlling the data rates for communications to and from a base station and a plurality of remote users is described, where the measured usage value is compared against at least one predetermined threshold value and the data rate of communications or a subset of communications on said communications resource is modified in accordance with said comparisons.
277
Patent
Spectrally efficient high capacity wireless communication systems
Craig H. Barratt,David M. Parish,Roy Richard H +2 more
- 01 Dec 1995
TL;DR: In this article, a wireless system includes a network of base stations (1) for receiving uplink signals transmitted from a plurality of remote terminals (69) and for transmitting downlink signals to the remote terminals.
221
Patent
Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
William A. Gardner,S.V. Schell +1 more
- 23 Jun 1992
TL;DR: In this article, an adaptive antenna array at a base station is used in conjunction with signal processing through self coherence restoral to separate the temporally and spectrally overlapping signals of users that arrive from different specific locations within the locale and to mitigate multipath fading and shadowing at the base station and, by reciprocity, to transmit directively to minimize interfering signals arriving at the mobile (or portable or stationary) units.
159
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