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Digital predistortion technique with in-band interference optimisation applied to DVB-T2

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6 Author(s)
M. Allegue-Martinez ; Departamento de Teoria de la Senal y Comunicaciones, ETSI, Universidad de Sevilla, Spain ; M. J. Madero-Ayora ; J. G. Doblado ; C. Crespo-Cadenas
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The efficient transmission and nonlinear modelling of orthogonal frequency division multiplexing (OFDM) signals are difficult to address owing to the special characteristics of this modulation scheme. Proposed is a digital predistortion technique suitable for the implementation in an OFDM transmitter to optimise the in-band interference caused by the nonlinear distortion generated in the amplification chain. The approach is experimentally validated by its application in one of the world's most advanced broadcasting systems, achieving an outstanding linearisation performance in the transmitter; specially for the in-band interference, a modulation error ratio (MER) of 42.1 dB is obtained.

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Electronics Letters  (Volume:48 ,  Issue: 10 )