An All‐Digital Receiver for Satellite Audio Broadcasting Signals Using Trellis Coded Quasi‐Orthogonal Code‐Division Multiplexing
作者:
Walter Braun,
Peter Eglin,
Ricard Abello,
期刊:
European Transactions on Telecommunications
(WILEY Available online 1993)
卷期:
Volume 4,
issue 1
页码: 23-32
ISSN:1124-318X
年代: 1993
DOI:10.1002/ett.4460040109
出版商: Wiley Subscription Services, Inc., A Wiley Company
数据来源: WILEY
摘要:
AbstractSpread Spectrum Code Division Multiplex is an attractive scheme for the transmission of multiple signals over a satellite transponder. By using orthogonal or quasi‐orthogonal spreading codes the interference between the users can be virtually eliminated. However, the acquisition and tracking of the spreading code phase can not take advantage of the code orthogonality since sequential acquisition and Delay‐Locked loop tracking depend on correlation with code phases other than the optimal despreading phase. Hence, synchronization is a critical issue in such a system.A demonstration hardware for the verification of the orthogonal CDM synchronization and data transmission concept is being designed and implemented. The system concept, the synchronization scheme, and the implementation are described. The performance of the system is discussed based on computer simulati
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