Research on All-pass Network for Wideband Satellite Receiver's RF Front-end Group Delay Equalization

Pengpeng Li, Yangbo Huang, Bing Zhou, Gang Ou

Abstract:	For high-performance satellite navigation receiver, such as GLONASS and Bei-Dou satellite navigation system which adopt wideband spread spectrum signal, zero of receiver will directly affect the ranging accuracy, if the wideband channel characteristic of RF front-end is not satisfactory, in particular if group delay characteristic of RF front-end is not constant, the zero estimates will not be imprecise, and deteriorating the ranging accuracy of receiver. this paper analyse the asymmetric parabola equalization method that is generally used for all-pass network designing, since the theory above no longer fit the wideband. This paper update the theory so that it can meet the demand of GLONASS and Bei-Dou receiver’s wideband group-delay equalization, this article brings forward the Multistage Center Symmetric Equalization theory. In order to design 3rd order all-pass group-delay equalized circuit with the theory of Centrer Symmetric Equalization, The method could be used to improve the group delay equalization in the wider passband of RF front-end channel.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	936 - 941
Cite this article:	Li, Pengpeng, Huang, Yangbo, Zhou, Bing, Ou, Gang, "Research on All-pass Network for Wideband Satellite Receiver's RF Front-end Group Delay Equalization," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 936-941.
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