A comparison of base station transmit diversity methods for third generation cellular standards

Rohani, K.; Harrison, M.; Kuchi, Kiran

doi:10.1109/vetec.1999.778075

“…At the receiver, the received signals are the sum of the propagation signals from all the transmit antennas plus additive noise, and the samples at the receiver can be expressed by With the system model defined in (1), it is well known that the optimum precoding vector¨" that maximizes the output SNR is [5],¨"…”

Section: Introductionmentioning

confidence: 99%

Adaptive Transmit Diversity with Quadrant Phase Constraining Feedback

Wu

¹

,

Horng

²

,

Zhang

³

et al. 2006

Wireless Pers Commun

8

0

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An adaptive transmit scheme with quadrant phase constraining feedback is proposed in this paper. With simple linear operations at both transmitter and receiver, the proposed algorithm can achieve better system performances with only 2M -2 bits of feedback information for systems with M transmit antennas. Theoretical performance bounds of the proposed transmit diversity scheme are derived. Simulation examples and theoretical analyses show that the proposed transmit diversity scheme outperforms not only the conventional open-loop transmit diversity techniques, but also some closed-loop transmit diversity techniques with more information transmitted in the feedback channel. PIMRC 2004This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved.

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“…With q k,m computed from (17), all the summed elements given in (14) are guaranteed to be nonnegative, and the feedback diversity gain of (13b) can be written bỹ…”

Section: General Casementioning

confidence: 99%

“…In addition, the channel state information (CSI) is utilized by some transmit diversity systems to further improve the system performance. The CSI can be made available to the transmitter through a separate feedback channel, and such encoding schemes are called close loop techniques [9][10][11][12][13][14][15]. Most of the existing close loop techniques require considerable amount of information transmitted in the feedback channel, e.g., vectors with complex-valued or real-valued elements, thus a lot of bandwidth of the reverse channel will be consumed by the feedback information.…”

Section: Introductionmentioning

confidence: 99%

Combining orthogonal space time block codes with adaptive sub-group antenna encoding

Wu¹,

Horng²,

Zhang³

et al.

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

0

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An adaptive space time transmit diversity scheme with simple feedback is proposed for the next generation wireless communication systems. By combining orthogonal space time block codes with adaptive sub-group antenna encoding, this new diversity scheme can effectively exploit the diversity potential provided by multiple antenna arrays without introducing interference among the signals transmitted at different antennas. In order to reduce the amount of feedback information as well as the computational complexity, a new quadrant phase constraining method is introduced to formulate the feedback information. With simple operations at both the transmitter and the receiver, the new adaptive diversity scheme out-performs not only open loop space time block encoding techniques, but also some close loop transmit diversity techniques with the same amount of feedback. IJWIN 2005This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. An adaptive space time transmit diversity scheme with simple feedback is proposed for the next generation wireless communication systems. By combining orthogonal space time block codes with adaptive sub-group antenna encoding, this new diversity scheme can effectively exploit the diversity potential provided by multiple antenna arrays without introducing interference among the signals transmitted at different antennas. In order to reduce the amount of feedback information as well as the computational complexity, a new quadrant phase constraining method is introduced to formulate the feedback information. With simple operations at both the transmitter and the receiver, the new adaptive diversity scheme outperforms not only open loop space time block encoding techniques, but also some close loop transmit diversity techniques with the same amount of feedback.

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“…At the receiver, the received signals are the sum of the propagation signals from all the transmit antennas plus additive noise, and the samples at the receiver can be expressed by With the system model defined in (1), it is well known that the optimum precoding vector¨" that maximizes the output SNR is [5],¨" , which is quite considerable when the number of antennas is larger than 2.…”

Section: Introductionmentioning

confidence: 99%

Adaptive transmit diversity with quadrant phase constraining feedback

Wu¹,

Horng²,

Zhang³

et al.

2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754)

View full text Add to dashboard Cite

An adaptive transmit scheme with quadrant phase constraining feedback is proposed in this paper. With simple linear operations at both transmitter and receiver, the proposed algorithm can achieve better system performances with only 2M -2 bits of feedback information for systems with M transmit antennas. Theoretical performance bounds of the proposed transmit diversity scheme are derived. Simulation examples and theoretical analyses show that the proposed transmit diversity scheme outperforms not only the conventional open-loop transmit diversity techniques, but also some closed-loop transmit diversity techniques with more information transmitted in the feedback channel. PIMRC 2004This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved.

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A comparison of base station transmit diversity methods for third generation cellular standards

Cited by 46 publications

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Adaptive Transmit Diversity with Quadrant Phase Constraining Feedback

Adaptive Transmit Diversity with Quadrant Phase Constraining Feedback

Combining orthogonal space time block codes with adaptive sub-group antenna encoding

Adaptive transmit diversity with quadrant phase constraining feedback

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