Subspace Recursive Weighted LS Solution of Iterative Synchronization in Time-Variant Channel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F07%3A03129993" target="_blank" >RIV/68407700:21230/07:03129993 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Subspace Recursive Weighted LS Solution of Iterative Synchronization in Time-Variant Channel

Original language description

Expectation-Maximization (EM) based iterative synchronizer is a particular form of the Information Measure Directed (IMD) synchronizer using a posteriori soft-information from the iterative decoding network. We solve the problem of EM based IMD synchronization in the general fast time-variant channel. The channel coefficients are allowed to change arbitrarily up to the granularity of the symbol period. We have identified the correspondence between the EM iterator and the weighted least squares (LS) problem. Particularly interesting is the subspace order recursive form of the LS iterator which reduces the implementation complexity. The procedure is demonstrated on example systems with the estimation of phase and jointly amplitude and phase on serially concatenated coding scheme. We use realistic Jake's Doppler dynamics as an example for the true channel and variety of subspace models for the EM estimator.

Czech name

Subspace Recursive Weighted LS Solution of Iterative Synchronization in Time-Variant Channel

Czech description

Expectation-Maximization (EM) based iterative synchronizer is a particular form of the Information Measure Directed (IMD) synchronizer using a posteriori soft-information from the iterative decoding network. We solve the problem of EM based IMD synchronization in the general fast time-variant channel. The channel coefficients are allowed to change arbitrarily up to the granularity of the symbol period. We have identified the correspondence between the EM iterator and the weighted least squares (LS) problem. Particularly interesting is the subspace order recursive form of the LS iterator which reduces the implementation complexity. The procedure is demonstrated on example systems with the estimation of phase and jointly amplitude and phase on serially concatenated coding scheme. We use realistic Jake's Doppler dynamics as an example for the true channel and variety of subspace models for the EM estimator.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

<a href="/en/project/GA102%2F05%2F2177" target="_blank" >GA102/05/2177: Multiple-input multiple-output spatial diversity mobile radio communication systems</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2007

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

European Transactions on Telecommunications

ISSN

1124-318X

e-ISSN

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Volume of the periodical

18

Issue of the periodical within the volume

5

Country of publishing house

IT - ITALY

Number of pages

16

Pages from-to

1-16

UT code for WoS article

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EID of the result in the Scopus database

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