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Reduced complexity sequential Monte ...

Georgia Institute of Technology.

Reduced complexity sequential Monte Carlo algorithms for blind receivers.

紀錄類型:	書目-電子資源 : 單行本
正題名/作者:	Reduced complexity sequential Monte Carlo algorithms for blind receivers./
作者:	Ozgur, Soner.
面頁冊數:	166 p.
附註:	Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1613.
Contained By:	Dissertation Abstracts International67-03B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	Download PDF (下載PDF全文)
ISBN:	9780542607431

Reduced complexity sequential Monte Carlo algorithms for blind receivers.
Ozgur, Soner.

Reduced complexity sequential Monte Carlo algorithms for blind receivers. - 166 p.

Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1613.

Thesis (Ph.D.)--Georgia Institute of Technology, 2006.

Monte Carlo algorithms can be used to estimate the state of a system given relative observations. In this dissertation, these algorithms are applied to physical layer communications system models to estimate channel state information, to obtain soft information about transmitted symbols or multiple access interference, or to obtain estimates of all of these by joint estimation.

ISBN: 9780542607431Subjects--Topical Terms:

170927
Engineering, Electronics and Electrical.

Reduced complexity sequential Monte Carlo algorithms for blind receivers.
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245 1 0 $a Reduced complexity sequential Monte Carlo algorithms for blind receivers.
300 $a 166 p.
500 $a Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1613.
500 $a Adviser: Douglas B. Williams.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2006.
520 $a Monte Carlo algorithms can be used to estimate the state of a system given relative observations. In this dissertation, these algorithms are applied to physical layer communications system models to estimate channel state information, to obtain soft information about transmitted symbols or multiple access interference, or to obtain estimates of all of these by joint estimation.
520 $a Initially, we develop and analyze a multiple access technique utilizing mutually orthogonal complementary sets (MOCS) of sequences. These codes deliberately introduce inter-chip interference, which is naturally eliminated during processing at the receiver. However, channel impairments can destroy their orthogonality properties and additional processing becomes necessary.
520 $a We utilize Monte Carlo algorithms to perform joint channel and symbol estimation for systems utilizing MOCS sequences as spreading codes. We apply Rao-Blackwellization to reduce the required number of particles. However, dense signaling constellations, multiuser environments, and the interchannel interference introduced by the spreading codes all increase the dimensionality of the symbol state space significantly. A full maximum likelihood solution is computationally expensive and generally not practical. However, obtaining the optimum solution is critical, and looking at only a part of the symbol space is generally not a good solution. We have sought algorithms that would guarantee that the correct transmitted symbol is considered, while only sampling a portion of the full symbol space. The performance of the proposed method is comparable to the Maximum Likelihood (ML) algorithm. While the computational complexity of ML increases exponentially with the dimensionality of the problem, the complexity of our approach increases only quadratically.
520 $a Markovian structures such as the one imposed by MOCS spreading sequences can be seen in other physical layer structures as well. We have applied this partitioning approach with some modification to blind equalization of frequency selective fading channel and to multiple-input multiple output receivers that track channel changes.
520 $a Additionally, we develop a method that obtains a metric for quantifying the convergence rate of Monte Carlo algorithms. Our approach yields an eigenvalue based method that is useful in identifying sources of slow convergence and estimation inaccuracy.
590 $a School code: 0078.
650 4 $a Engineering, Electronics and Electrical. $3 170927
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710 2 0 $a Georgia Institute of Technology. $3 1000005517
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790 1 0 $a Williams, Douglas B., $e advisor
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791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3212283 $z Download PDF (下載PDF全文)

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