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In this paper we present an original way to simplify the architecture of a frequency synthesizer for the 3.1–10.6 GHz band. On the basis of measurement results, obtained by a produced CMOS prototype, the architecture performances are analyzed. As spur frequencies are inevitably generated, we propose to apply an interferences reduction method at the receiver. This solution allows meeting the MultiBand...
In this article, we show that the non-ideal Radio-Frequency (RF) front-ends have to be corrected in order to contribute in a Green radio development. In fact, the effects of typical RF imperfections, like nonlinearities, carrier frequency offsets, and IQ imbalances, can be compensated for, when digital correction algorithms are applied. Such algorithms enable Green applications (e.g., Orthogonal Frequency...
The paper presents the design of an agile frequency synthesizer for an UWB transmission in the 3–11 GHz spectrum. The design is presented top-down, starting from a complete structure, the implemented basic structure, the schematic and the layout considerations and the testing. The circuits are implemented in 0.35 μm SiGe BiCMOS technology process AMS_S35D4 in order to validate the required performances.
We consider a synthesizer proposed for multiband OFDM. This paper presents a simple way to correct the in-band default caused by the non-ideal frequency synthesizer, in the case of one user. This compensation is a first step toward the possibility of a conception of a less constrained synthesizer.
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