Title :
OFDM PAPR reduction by pre-scrambling and clipping
Author :
Zelenkov, A.V. ; Litvinenko, A.
Author_Institution :
LEO Res. Centre, Ventspils, Latvia
Abstract :
This article presents a new method for Peak-to-Average Power Ratio (PAPR) reduction of Orthogonal Frequency Division Multiplexing (OFDM) signal. The proposed method is based on a relatively simple processing - pre-scrambling of OFDM symbol bit-block. The modified m-sequence with the least peak-factor for scrambling is used. The stability of pre-scrambled OFDM signal to the clipping is examined as well. C/C++ computer simulation of OFDM system with 64 subcarriers and frequency domain block-typepilot channel estimation is performed for AWGN multipath channel. As a result, bit error rate (BER) performance for various clipping levels is presented due to computer simulation. In addition, the Efficiency of joined pre-scrambling and clipping method is considered.
Keywords :
AWGN channels; C++ language; OFDM modulation; channel estimation; error statistics; frequency-domain analysis; interference suppression; m-sequences; multipath channels; telecommunication computing; AWGN multipath channel; BER; C; C++; PAPR reduction; bit error rate; clipping method; frequency domain block typepilot channel estimation; m-sequence; orthogonal frequency division multiplexing; peak to average power ratio; prescrambled OFDM signal; reduction; symbol bit block; Bit error rate; Channel estimation; Communication systems; Estimation; Frequency domain analysis; Peak to average power ratio;
Conference_Titel :
Electronics Conference (BEC), 2012 13th Biennial Baltic
Conference_Location :
Tallinn
Print_ISBN :
978-1-4673-2775-6
DOI :
10.1109/BEC.2012.6376836
