Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Adaptive Duplexer Implemented Using Feedforward Technique With a BST Phase Shifter
 

Summary: THlA-3
Adaptive Duplexer Implemented Using Feedforward Technique
With a BST Phase Shifter
Tomas O'Sullivan, Robert York+*,Bud Noren", Peter Asbeck
University of California, San Diego, La Jolla, CA 92093,USA
+University of California, SantaBarbara, Santa Barbara, CA 93106,USA
*AgileMaterials and Technologies,Goleta, CA 93117,USA.
Abstract - As the complexity of modern modulation
schemes increases, the noise levels inserted in the receive
band by the transmitter are also increased. In this paper a
technique to enhance the isolation of a duplexer is
introduced,which reducesthe noise levels in the receiveband
of the system. Feedforwardtechniquesare used to create an
adaptive null in the receive band, which can be targeted at
any channel across the band. This null has been shown to
give an improvedisolation of 20dB for the duplexerover a 2
MHz bandwidth. This feedforward system is implemented
using a BST phase shifter to enable tunability of the
enhancementnull.
Index Terms - Adaptive duplexers, BST phase shifters,

  

Source: Asbeck, Peter M. - Department of Electrical and Computer Engineering, University of California at San Diego

 

Collections: Engineering