The Effect of Nonlinear Power Amplifiers on the Performance of a Hiperlan/2 System


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Moseley, N. and Schiphorst, R. and Slump, K. (2005) The Effect of Nonlinear Power Amplifiers on the Performance of a Hiperlan/2 System. In: 2nd IEE/EURASIP Conference on DSPenabledRadio, , 2005, Southampton, UK.

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Abstract:Real-world power amplifier (PAs) are weakly nonlinear. The nonlinear behavior causes sub-carrier intermodulation in OFDM based transmitters. This paper shows the results of simulations performed on a software sysHiperLAN/2tem with a nonlinear power amplifier model. We show that HiperLAN/2 is much less sensitive to nonlinearities of the PA when BPSK or QPSK modulated sub-carriers are used compared to QAM16 or QAM64 modulated sub-carriers. Both QAM16 and QAM64 require a PA backoff amount of at least 5 dB while BPSK and QPSK don't require any backoff. This means that BPSK or QPSK modulated PFDM is more power efficient.
Item Type:Conference or Workshop Item
Copyright:©2005 IEE
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/53728
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