Study the Performance of SLM for Different Number of Subcarriers
Автор: Mohammad Alamgir Hossain, Md. Ibrahim Abdullah, Md. Shamim Hossain, Md. Salim Raza
Журнал: International Journal of Information Technology and Computer Science(IJITCS) @ijitcs
Статья в выпуске: 9 Vol. 4, 2012 года.
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Orthogonal Frequency Division Multiplexing (OFDM) is an attractive modulation technique for transmitting large amounts of digital data over radio waves. One major disadvantage of OFDM is that the time domain OFDM signal which is a sum of several sinusoids leads to high peak to average power ratio (PAPR) which leads to power inefficiency in RF section of the transmitter and increased complexity in the analog to digital and digital to analog Converter. Selected mapping (SLM) is a well-known method for reducing the PAPR in OFDM. In this paper, we have studied the performance of SLM for Different Number of Subcarriers. Simulation result shows that the PAPR is reduced significantly when the number of phase sequences is increased and PAPR is increased when the number of subcarriers is increased. It also shows that data speed increases when subcarriers increase where N-point IFFT/FFT circuit depends on N-subcarriers.
OFDM, PAPR, Power Amplifiers, Selected Mapping, Complimentary Cumulative Distribution Function
Короткий адрес: https://sciup.org/15011761
IDR: 15011761
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