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Due to the rapid increase of wireless services below 6 GHz, multi-band multi-mode wireless terminals are becoming popular. In this paper, up/down-conversion schemes are reviewed, in addition the pros and cons are discussed. At the present, direct conversion scheme is the most appropriate for both transmitters and receivers of these terminals which are able to cover the 0.4-6 GHz RF frequency range...
The present paper describes the physical layer of an ultra-wideband impulse radio (UWB-IR) communication system, together with its implementation in a fully integrated transceiver. The objective of this work was to design and test a low-power radio communication system for medium data-rate, short-range communication. The system is based on frequency hopping on-off keying modulation (FH-OOK) for transmission,...
The paper describes design, modeling and simulation of MCM technology based MM wave RF transceiver. Electrical imperfections of the circuit like non-linearity, gain compression, mixer inter modulation, spurious, harmonic level, gain/ level variation over frequency band have been simulated for the prediction of the performance based on dual conversion transmitter and receiver modules. To realize RF...
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