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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GA102%2F05%2F2177" target="_blank" >GA102/05/2177: Systémy prostorově diversitní mobilní rádiové komunikace s mnohonásobnými vstupy a výstupy</a><br>

Návaznosti

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

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

European Transactions on Telecommunications

ISSN

1124-318X

e-ISSN

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Svazek periodika

18

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

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EID výsledku v databázi Scopus

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