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This paper studies the impact of bandwidth limitation on the linearity of multilevel LINC (ML-LINC) transmitter. By using the signals with discrete levels for characterisation, both amplitude and phase dispersions around levels can be observed, which result in the degradation of system linearity. It is also shown that improvement on both adjacent channel leakage ratio (ACLR) and error vector magnitude...
This paper studies the impact of bandwidth limitation on the linearity of multilevel LINC (ML-LINC) transmitter. By using the signals with discrete levels for characterisation, both amplitude and phase dispersions around levels can be observed, which result in the degradation of system linearity. It is also shown that improvement on both adjacent channel leakage ratio (ACLR) and error vector magnitude...
This paper presents a new mismatch calibration technique for outphasing transmitters by means of instantaneous measurement characterisation. Results will show that by creating a model of the instantaneous measurements, the gain and phase imbalance between the outphasing paths can be fully compensated using only a single iteration. A multilevel-outphasing transmitter is implemented using 10 W GaN devices...
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