Repetitive fixed bandwidth limitation and QAM correction for EER power amplifier

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Mustafa, Abdul K and Faulkner, Michael (2010) Repetitive fixed bandwidth limitation and QAM correction for EER power amplifier. In: 2010 IEEE Wireless Communications and Networking Conference, WCNC 2010 : Proceedings, Sydney, Australia, 18-21 April 2010. IEEE, Piscataway, N.J..


Envelope elimination and restoration (EER) power amplifier architecture can achieve high efficiency and linearity. However, when used with modern modulation schemes such as orthogonal frequency division multiplexing (OFDM) and wideband code division multiple access (W-CDMA), it suffers from expanded bandwidth problem. This paper shows that, the straightforward bandwidth limitation results in poor efficiency of the power amplifier (PA). We propose a new repetitive bandwidth limitation technique which reduces bandwidth expansion of both the envelope and phase polar drive signals without compromising the efficiency of the PA. It has been found that the improvement in bandwidth of drive signals is proportional to the number of repetition. The bandwidth limitation often results in spectral splatter and error vector magnitude (EVM). To counter this, we employ a QAM correction technique which reduces the in band distortion.

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Item type Book Section
DOI 10.1109/WCNC.2010.5506232
Official URL
ISBN 9781424463961, 9781424463985
Subjects Historical > FOR Classification > 1005 Communications Technologies
Historical > SEO Classification > 8617 Communication Equipment
Historical > Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
Keywords ResPubID21462, bandwidth, broadband amplifiers, high power amplifiers, linearity, modulation coding, multiaccess communication, OFDM modulation, power amplifiers, quadrature amplitude modulation, wideband, CDMA , OFDM , QAM correction technique, envelope elimination and restoration power amplifier architecture, error vector magnitude, orthogonal frequency division multiplexing, repetitive fixed bandwidth limitation, wideband code division multiple access
Citations in Scopus 3 - View on Scopus
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