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 reconfigurable radio application. The technique approximates the inverse of the amplifier transfer function up to third-order (cubic) nonlinearity by using polynomial functions. 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 will continue by extending the predistorter to include higher orders of nonlinearity for a larger improvement in IMD suppression.
|Translated title of the contribution||A broadband polynomial predistorter for reconfigurable radio|
|Title of host publication||Vehicular Technology Conference 2001 (VTC 2001-Spring), Rhodes|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Pages||1968 - 1972|
|Number of pages||5|
|Publication status||Published - May 2001|
|Event||53rd Vehicular Technology Conference 2001 (VTC 2001-Spring) - Rhodes, Greece|
Duration: 1 May 2001 → …
|Conference||53rd Vehicular Technology Conference 2001 (VTC 2001-Spring)|
|Period||1/05/01 → …|
Bibliographical noteConference Proceedings/Title of Journal: IEEE 53rd Vehicular Technology Conference, 2001 (VTC 2001-Spring)
Rose publication type: Conference contribution
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