Akademik Veri Yönetim Sistemi
53rd IEEE Vehicular Technology Conference (VTC), RHODES, Yunanistan, 6 - 09 Mayıs 2001, ss.1968-1972, (Tam Metin Bildiri)
An analogue polynomial predistorter working at RF is presented. It is capable of operating at multiple frequency, bands over a wide linearisation bandwidth. These are important features for a reconfrgurable radio application. The technique approximates the inverse of the amplifiers transfer,function tip to third-order (cubic) nonlinearity by using polynomial fioictions. Theoretical analysis shows that the performance of the technique is limited more by the generation of additional fifth-order IMD(IM5), than the gain and phase matching of the predistorter. The measured two-tone tests at different frequency bands show 13 dB suppression of third-order IMD (IM3) is possible over 40 MHz tone separation. A 30 dB IM3 reduction can be achieved by increasing the IM5 by 9 dB. The research it will continue: by, extending the predistorter to include higher orders of nonlinearity,for a larger improvement in IMD suppression.