Title :
Performance assessment of DFT-OFDM and DWT-OFDM systems in the presence of the HPA nonlinearity
Author :
Kiani, Abdolreza ; Baghersalimi, Gholamreza ; Zanj, Bahman
Author_Institution :
Dept. of Electr. Eng., Univ. of Guilan, Rasht, Iran
Abstract :
This paper investigates performance degradation of conventional Orthogonal Frequency Division Multiplexing (OFDM) and Discrete Wavelet Transform based OFDM (DWT-OFDM) systems when the signals are passed through a nonlinear High Power Amplifier (HPA). In the case of DWT-OFDM, several wavelets such as Daubechies, Symlet and Biorthogonal are evaluated. Simulation results show that DWT-OFDM - specifically Haar (dbl) - is more robust against nonlinearity in comparison to DFT-OFDM.
Keywords :
Haar transforms; OFDM modulation; discrete wavelet transforms; power amplifiers; DFT-OFDM performance assessment; DWT-OFDM systems; HPA nonlinearity; Haar transforms; discrete wavelet transform; high power amplifier; orthogonal frequency division multiplexing; Bit error rate; Discrete wavelet transforms; Filter banks; Modulation; Peak to average power ratio; Power amplifiers;
Conference_Titel :
Telecommunications (ConTEL), Proceedings of the 2011 11th International Conference on
Conference_Location :
Graz
Print_ISBN :
978-1-61284-169-4
Electronic_ISBN :
978-3-85125-161-6
