TY - JOUR
T1 - Look-up table techniques for adaptive digital predistortion
T2 - a development and comparison
AU - Muhonen, Kathleen J.
AU - Kavehrad, Mohsen
AU - Krishnamoorthy, Rajeev
N1 - Funding Information:
Manuscript received March 19, 1999; revised February 16, 1999. This work was supported by Lockheed Martin through an academic scholarship, Lucent Technologies, Inc. through a summer appointment, and the Ben Franklin Partnership program in Pennsylvania.
PY - 2000/9
Y1 - 2000/9
N2 - Simple techniques are presented for performing digital predistortion by use of look-up tables. Performance is measured by the traditional spectral regrowth analysis which quantifies the out-of-band distortion. Also included in the performance evaluation is constellation distortion which quantifies the in-band distortion which is important for bit erro rate (BER) performance. As an added performance measure, predistortion is also analyzed with respect to its effect on amplifier efficiency. A nonuniform spacing technique is described which is simple to implement and has a performance very close to a cited optimum approach. In addition, scaling the gain of these tables provides further improvement in terms of correction and efficiency performance. Finally, adaptive indexing is introduced. These algorithms allow the various techniques to adapt to changing signal and power amplifier characteristics.
AB - Simple techniques are presented for performing digital predistortion by use of look-up tables. Performance is measured by the traditional spectral regrowth analysis which quantifies the out-of-band distortion. Also included in the performance evaluation is constellation distortion which quantifies the in-band distortion which is important for bit erro rate (BER) performance. As an added performance measure, predistortion is also analyzed with respect to its effect on amplifier efficiency. A nonuniform spacing technique is described which is simple to implement and has a performance very close to a cited optimum approach. In addition, scaling the gain of these tables provides further improvement in terms of correction and efficiency performance. Finally, adaptive indexing is introduced. These algorithms allow the various techniques to adapt to changing signal and power amplifier characteristics.
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U2 - 10.1109/25.892601
DO - 10.1109/25.892601
M3 - Article
AN - SCOPUS:0034261717
SN - 0018-9545
VL - 49
SP - 1995
EP - 2002
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 5
ER -