PAPR REDUCTION OF OFDM SIGNALS USING SELECTED MAPPING TECHNIQUE: MODELLING& SIMULATION

Authors

  • NayanKhare,Prof. AnandSwaroop,Sourabh Ku OIMT Department Of Electronics & Communication OIMT Damoh

Keywords:

Communication, Carrier, Frequency

Abstract

According to the demand of advance communication field there should be high datarate in addition to both power efficiency and lower bit error rate. This demand of highdata rate can be fulfilled by the single carrier modulation with compromising the tradeoff between the power efficiency and bit error rate. Again in the presence of frequencyselective fading environment, it is very difficult to achieve high data rate for thissingle carrier modulation with a lower bit error rate performance. With consideringan advance step towards the multi carrier modulation scheme it is possible to gethigh data rate in this multipath fading channel without degrading the bit error rateperformance. To achieve better performance using multi carrier modulation we shouldmake the subcarriers to be orthogonal to each other i.e. known as the Orthogonal Frequency Division Multiplexing (OFDM) technique.But the great disadvantage of the OFDM technique is its high Peak to Average Power Ratio (PAPR). As we are using the linear power amplifier at the transmitterside so it’s operating point will go to the saturation region due to the high PAPRwhich leads to in-band distortion and out-band radiation. This can be avoided withincreasing the dynamic range of power amplifier which leads to high cost and highconsumption of power at the base station.This report presents an efficient technique i.e the Selected Mapping which reducesthe PAPR. Also the analysis of bit error rate performance and the computationalcomplexity for this technique are being discussed here.

References

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Global Journal of Multidisciplinary Studies Available online at www.journal.edwin.co.in

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Feb 2014

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Published

2014-02-28

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Vol. 3 No. 3 (2014): FEBRUARY 2014

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