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Showing 1 to 4 of 4 for “"IQ Modulator"”.
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Wideband direct conversion IQ modulators in indium phosphide DHBT technology
… what performance enhancements might be seen in IQ modulator circuits using an InP DHBT process. During the course of investigating this question, I focused on designing a direct conversion IQ modulator that could be useful across the full bandwidth of existing vector signal generators and also …
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SPECTRALLY EFFICIENT MULTICARRIER SYSTEMS FOR FIBER-OPTIC TRANSMISSION
… Although different modulation and detection techniques are used, all the multicarrier systems investigated in this dissertation achieve a high spectral efficiency of 1 Baud/s/Hz. Orthogonal frequency-division multiplexing (OFDM) and Nyquist wavelength-division multiplexing (Nyquist-WDM) are the …
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Design of low-power K-band circuits in CMOS technology
… Zu guter Letzt ist ebenso die Erzeugung von IQ-modulierten Signalen hoher Genauigkeit über größere Bandbreiten eine Herausforderung beim Entwurf solcher Transceiver. Zur Überwindung dieser Problemstellungen werden in der vorliegenden Dissertation neuartige Methoden und optimierte Schaltungen …
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Integration of broadband direct-conversion quadrature modulators
… integrated microwave transmitters. A quadrature modulator realizes the phasing method by combining signals phased at quadrature (i.e. at 90° offsets) to produce a single-sideband (SSB) output. In this way output filtering can be removed or its specifications greatly relieved so as to produce an …