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Adaptive duplexer implemented using single-path and multipath feedforward techniques with BST phase shifters
2005
IEEE transactions on microwave theory and techniques
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 surface acoustic wave duplexer is introduced, which reduces the noise levels in the receive band of the system. Feedforward techniques are 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 improved
doi:10.1109/tmtt.2004.839900
fatcat:2456noespjaoxge53z2ffhc7x4