Orthogonal Frequency Division Multiplexing (OFDM) is a very effective field of research of wireless communication and also the high speed data transmission process in this system. The main drawback of OFDM system is high Peak to – Average Power Ratio (PAPR). Due to high PAPR there is inefficient use of high power amplifier and this could limit transmission efficiency. Selected mapping (SLM) is ...

The Peak to Average Power Ratio (PAPR) is currently viewed as an important implementation issue in communication systems. Specifically, for wireless cellular systems the price of the mobile unit is required to remain low. This means that a limited PAPR can be supported. Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier (SC) are the prominent candidates for the next generation...

This paper proposes a new peak-to-average power ratio (PAPR) reduction scheme for short packet communications in multiple transmit antenna environments. Instead of applying individual PAPR reduction on each antenna, a joint PAPR reduction technique is proposed. By applying a relevant unitary rotation over the transmit antennas, overall PAPR of the multiple transmit antenna system is reduced. Th...

Orthogonal Frequency Division Multiplexing (OFDM) has become the popular modulation technique in high speed wireless communications. One of the main disadvantages of Orthogonal Frequency Division multiplexing (OFDM) is its high Peak-to-Average Power Ratio (PAPR), which significantly reduces the efficiency of the High Power Amplifier (HPA). Due to the simplest way for PAPR reduction, clipping te...

Peak-toaverage power ratio (PAPR) is one of the major problems of orthogonal frequency division multiplexing (OFDM). The larger PAPR signal may cause high out-of-band radiation, when the OFDM signal is passed through a radio frequency power amplifier. In literatures, many researchers proposed various methods to reduce PAPR. Among those, Dummy sequence Insertion (DSI) and partial transmit sequen...

High Peak to Average Power Ratio (PAPR) of the transmitted signal is a critical problem in multicarrier modulation systems (MCM) such as Orthogonal Frequency Division Multiplexing (OFDM), and Multi-Carrier Code Division Multiple Access (MC CDMA) systems, due to large number of subcarriers. High PAPR leads to reduced resolution, and battery life. It also deteriorates system performance. This pap...

Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) is a promising candidate for 4G broadband wireless communications. However, one main disadvantage of MIMO-OFDM is that the signals transmitted on different antennas might have large peak-to-average power ratio (PAPR). A new concurrent PAPR reduction algorithm based on the property of orthogonal space-time bloc...

In this paper, an efficient method for minimizing the high Peak to Average Power Ratio (PAPR), based on Clipping and Differential Scaling, in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. In this technique, the amplitude of complex OFDM signal is clipped and then scaled in such a way so that the PAPR is reduced without causing much degradation in Bit Error Rate (BER). C...

OFDM combined with TDM (OFDM/TDM) can be used to reduce a high peak-to-average power ratio (PAPR) of OFDM, but the PAPR reduction is not sufficient. To further reduce the PAPR, an amplitude clipping can be applied. In this letter, we investigate the effect of clipping on OFDM/TDM with and without channel coding. It is shown that amplitude clipped OFDM/TDM has an advantage over clipped OFDM with...

Abstract—Orthogonal frequency division multiplexing (OFDM) is a promising broadband transmission technique. However, OFDM has a drawback of large peak-to-average power ratio (PAPR), which is proportional to the number of subcarriers. A PAPR reduction scheme called tone injection (TI) was proposed that exploits the property of a nonlinear modulo function. The TI is equivalent to the one that sup...