-----------------------------------------ABSTRACT------------------------------------------A high speed network 802.11a (OFDM) has emerged as very popular wireless transmission technique in which digital data bits are transmitted at a high speed in a radio environment. But non linear effect (PAPR) is challenge of high speed based communication that has recently drawn much attention. Non linear ...

Cognitive Radio technology is a promising solution to utilize the licensed frequency band in opportunistically. OFDM is a multicarrier modulation scheme. It provides the number of benefits when it is implemented at the physical layer of the cognitive radio such as ease in spectrum sensing, reducing the Inter Symbol Interference, flexible in adapting to environment conditions, provides interoper...

The high peak-to-average power ratio (PAPR) is one of the major problems of orthogonal frequency division multiplexing (OFDM) systems in wireless transmission. Therefore, partial transmit sequence (PTS), a promising scheme that can provide good PAPR reduction performance, has been proposed for OFDM transmission to eliminate distortion. The PTS method divides the input data block into disjoint s...

In several wireless communication systems and standards, Orthogonal Frequency Division Multiplexing (OFDM) is used widely due to its high spectral efficiency, high data rate, multipath delay spread tolerance, power efficiency, robustness to multipath fading channels and immunity to the frequency selective fading channels. However, the main challenge for OFDM system implementation is high PAPR, ...

Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) system have been proposed in the recent past for providing high data-rate services over wireless channels. When combined with space time coding it provides the advantages of space-time coding and OFDM, resulting in a spectrally efficient wideband communication system. However, MIMO-OFDM system suffer with the ...

The concept of Orthogonal Frequency Division Multiplexing (OFDM) was initiated and well prominent since 1966 and gradually reached to its development into standard system form during 1990. Large amounts of digital data, with high data rate, reliable communication over fading channels can be transmit over radio waves that is why OFDM is known to be an attractive technique for multicarrier transm...

We analyse the impact of distortionless peak-to-average power ratio (PAPR) reduction methods on the ergodic capacity of orthogonal frequency division multiplexing (OFDM) systems in AWGN and frequency selective channels. We consider the following tradeoff: decreasing PAPR increases the efficiency of the linear power amplifier (PA), yielding an increase in the average power emitted and consequent...

Orthogonal frequency division multiplexing (OFDM) is known as one of the promising broadband techniques in wireless communications. One of the major drawbacks of OFDM is its high peak-to-average power ratio (PAPR) due to the overlay process of all subcarrier signals. This leads to distortion problems at the receiver. Partial Transmit Sequence (PTS) technique is one of the most popular to reduce...

PAPR reduce the efficiency of system in MC-CDMA so we have to use PTS to recover from this. In this paper, Partial Transmit Sequence technique is used, which uses suboptimal algorithms & their performances are compared. For their performance evaluating PAPR reduction scheme is CCDF of the PAPR of transmitted continuous time signal. BPSO has better PAPR reduction capability than BFO Algorithm on...

Abstract— One of the challenging issues for Filter Bank Multicarrier (FBMC) systems is their high Peak-to-Average Power Ratio (PAPR) which leads to the saturation of the high power amplifiers and consequently increases the out of band power. In this paper, we evaluate different FBMC PAPR reduction techniques and especially analyze the impact of the prototype filter length/overlapping factor on ...