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2011 | OriginalPaper | Chapter

A Novel Simplified Log-Likelihood Ratio for Soft-Output Demapping of CMMB

Authors : Xiangran Sun, Zhibin Zeng

Published in: Advances in Computer Science and Education Applications

Publisher: Springer Berlin Heidelberg

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In this paper, a new soft-output demapper generating log-likelihood ratio (LLR) is proposed based on the simplified algorithm instead of an exact LLR. Moreover we design an efficient soft-decision demapping algorithm and implement a low complexity demapper for the 16-QAM constellation of the China Mobile Multimedia Broadcasting (CMMB) standard. In addition, the proposed soft-decision demapper can reduce the hardware complexity by discarding the multipliers and decreasing the soft-value width.

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previous chapter Improving Undergraduates’ Experience of Online Learning: An Approach of Web-Mediated Self-Regulated Learning and Collaborative Learning
next chapter The Design of the Open Digital-Classroom System and Its Workflow
Metadata
Title
A Novel Simplified Log-Likelihood Ratio for Soft-Output Demapping of CMMB
Authors
Xiangran Sun
Zhibin Zeng
Copyright Year
2011
Publisher
Springer Berlin Heidelberg
Book
Advances in Computer Science and Education Applications

Print ISBN: 978-3-642-22455-3

Electronic ISBN: 978-3-642-22456-0

Copyright Year: 2011

DOI
https://doi.org/10.1007/978-3-642-22456-0_51

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