Search for essays about: "IQ imbalance"

Found 2 essays containing the words IQ imbalance.

2. 1. Digital Methods for Reduction of IQ Imbalance in OFDM Systems

   University essay from Blekinge Tekniska Högskola/ING

   Author : Daxious Wendemu; [2010]
   Keywords : telekommunikation; telecommunications; signalbehandling; signal processing; elektroteknik; electrotechnology; iq imbalance; least square ls ; least mean algorithm lms ; ofdm;

   Abstract : Orthogonal frequency division multiplexing (OFDM) based systems are susceptible to radio front end induced impairments. These impairments caused by as a consequence of imbalances in the In-phase (I) and Quadrature-phase (Q) branches. IQ imbalances are worries to be addressed for the Superhetrodyne and the zero IF architectures in analog domain. READ MORE

4. 2. Dynamic nonlinear pre-distortion of signal generators for improved dynamic range

   University essay from Högskolan i Gävle/Institutionen för teknik och byggd miljö

   Author : Suzan Jawdat; [2009]
   Keywords : Predistortion; IQ imbalance; Predistortion mirror distortion; Power amplifier deficiencies; Parsimonious predistorter structures; Predistorter properties; Training of the predistorter based on N-sequences of data.;

   Abstract : In this thesis, a parsimoniously parameterized digital predistorter is derived for linearization of the IQ modulation mismatch and the amplifier imperfection in the signal generator [1]. It is shown that the resulting predistorter is linear in its parameters, and thus they may be estimated by the method of least-squares. READ MORE