Spelling suggestions: "subject:"mimo systems"" "subject:"ximo systems""
51 |
Performance evaluation and enhancement of MIMO broadcast channelsLu, Peng 25 May 2011 (has links)
In Multiple-Input Multiple-Output (MIMO) broadcast channels, the multi-antenna
basestation transmits information to multiple non-cooperative mobile users simultaneously.
Among various transmission schemes, zero-forcing beamforming (ZFBF)
and random unitary beamforming (RUB) are of particular interest due to their low
implementation complexity and ability to explore the multiplexing gain provided by
multiple transmit antennas.
To investigate the effects of multiuser diversity on sum-rate performance, previous
studies of beamforming schemes in multiuser MIMO systems usually employ
asymptotical analysis. In this work, while assuming channel gain follows Rayleigh flat
fading, we study the sum-rate performance of ZFBF and RUB through exact mathematic
analysis. For this purpose, we derive the statistics of selected users's effective
channel gain, which enable us to calculate the sum rate accurately and efficiently.
With derived sum-rate expressions, we evaluate and compare the sum-rate performance
of MIMO broadcast channels with RUB and dual-transmit-antenna ZFBF. In addition, we apply this analytical method to study strategies that mitigate multiuser interference for RUB-based multiuser MIMO systems. The strategies we consider in the thesis include
• Reducing the number of served users at a time. We present a new user scheduling
scheme, which imposes a threshold On user's SINR for feedback load reduction
and only activates those beams that are requested by feedback users.
• Exploiting receive diversity. When receivers use more than one antennas, we
evaluate the sum-rate performance gain offered by selection combining (SC) and
optimum combining (OC) schemes, respectively.
In addition to beamforming techniques, we study the symbol error rate (SER)
performance of MIMO broadcast channels with vector perturbation (VP) precoding
and quantized channel feedback. Based. on the established equivalent relations in
terms of minimum mean square error (MMSE) and SER between quantized and
perfect channel feedback cases, we investigate the tradeoff between feedback load and
achievable diversity gain. / Graduate
|
52 |
Optimal signaling for MIMO interference networksSong, Yang January 2006 (has links)
Thesis (M.S.)--University of Hawaii at Manoa, 2006. / Includes bibliographical references (leaves 40-42). / viii, 42 leaves, bound ill. 29 cm
|
53 |
Grassmann quantization for precoded MIMO systemsMondal, Bishwarup, January 1900 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.
|
54 |
Channel variations in MIMO wireless communication systems : eigen-structure perspectives : a thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand /Kuo, Ping-Heng. January 1900 (has links)
Thesis (Ph. D.)--University of Canterbury, 2007. / Typescript (photocopy). "June 12, 2007." Includes bibliographical references (p. 153-171). Also available via the World Wide Web.
|
55 |
MIMO communication capacity : antenna coupling and precoding for incoherent detection /Bikhazi, Nicolas W., January 2006 (has links) (PDF)
Thesis (Ph. D.)--Brigham Young University. Dept. of Electrical and Computer Engineering, 2006. / Includes bibliographical references (p. 101-106).
|
56 |
Severely fading MIMO channels : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Electrical and Computer Engineering at the University of Canterbury, Christchurch, New Zealand /Choi, Seung-Ho. January 1900 (has links)
Thesis (M.E.)--University of Canterbury, 2007. / Typescript (photocopy). "March 2007." Includes bibliographical references (p. [83]-95). Also available via the World Wide Web.
|
57 |
Optimization in linear multiuser MIMO systemsZheng, Gan. January 2007 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2008. / Also available in print.
|
58 |
MIMO communication for ad hoc networks a cross layer approach /Jaiswal, Suraj Kumar, January 2008 (has links)
Thesis (M.S.E.C.E.)--University of Massachusetts Amherst, 2008. / Includes bibliographical references (p. 74-77).
|
59 |
Multiple coding and space-time multi-user detection in multiple antenna systemsLiu, Jianhan, January 2005 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 84-89).
|
60 |
Space-time code designs and fast decoding for MIMO and cooperative communication systemsShang, Yue. January 2009 (has links)
Thesis (Ph.D.)--University of Delaware, 2008. / Principal faculty advisor: Xiang-Gen Xia, Dept. of Electrical & Computer Engineering. Includes bibliographical references.
|
Page generated in 0.0441 seconds