Patent
Method and apparatus for multi-antenna transmission
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TLDR
In this article, a method and apparatus for multi-antenna transmission in a multiple-input, multiple-output (MIMO) communication system, a method that reduces the number of transmit weight matrices is presented, where each transmit weight matrix is applied to a plurality of subcarriers.Abstract:
In a multiple-input, multiple-output (MIMO) communication system, a method and apparatus for multi-antenna transmission In accordance with the preferred embodiment of the present invention a reduced number of transmit weight matrices are fed back to the transmitter Each transmit weight matrix is then applied to a plurality of subcarriers Because each transmit weight matrix is applied to more than one subcarrier, the amount of weight matrixs being fed back to the transmitter is greatly reducedread more
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References
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A simple transmit diversity technique for wireless communications
TL;DR: This paper presents a simple two-branch transmit diversity scheme that provides the same diversity order as maximal-ratio receiver combining (MRRC) with one transmit antenna, and two receive antennas.
Journal ArticleDOI
Maximum ratio transmission
TL;DR: In this article, the authors present the concept, principles and analysis of maximum ratio transmission for wireless communications, where multiple antennas are used for both transmission and reception, and show that the average overall signal-to-mise ratio (SNR) is proportional to the cross correlation between channel vectors and that error probability decreases inversely with the (L/spl times/K)th power of the average SNR.
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Transmit diversity in 3G CDMA systems
Roy Thomas Derryberry,Steven D. Gray,Dumitru Mihai Ionescu,Giridhar D. Mandyam,Balaji Raghothaman +4 more
TL;DR: The concept of transmit diversity is described, the features of selected TD techniques are explained and the categorization of TD methods into open loop and closed loop methods is explained.
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Adaptive transmitting antenna arrays with feedback
D. Gerlach,Arogyaswami Paulraj +1 more
TL;DR: This work proposes a "probing" mode during which probing signals received at the mobiles are fed back to the transmitter, enabling the transmitter to form the necessary transmission beampatterns.
Journal ArticleDOI
Adaptive antennas at the mobile and base stations in an OFDM/TDMA system
TL;DR: In this article, the authors considered the use of adaptive antennas at the BS and mobile stations (MS), operating jointly, in combination with orthogonal frequency-division multiplexing, and the advantages of the proposed system includes reductions in average error probability and increases in capacity compared to conventional systems.