Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. This scheme uses a number of sub-carriers and converts a frequency selective fading channel to a set of parallel flat fading channels. The OFDM signal is having a drawback that some signal values can be much higher than the average value. This results in high Squared Crest Fac...

Orthogonal Frequency Division Multiplexing (OFDM) has well known advantages such as robustness against frequency selective fading and narrowband interference, high efficiency on bandwidth, and efficient implementation. Recently, OFDM has been widely used in digital audio broadcasting (DAB), digital video broadcasting-terrestrial (DVB-T), mobile multimedia access communication (MMAC), IEEE802.11...

OFDM is a multicarrier modulation technique, where a high speed data stream is further splited into number of parallel streams of low data rate and these low rates data streams are transmitted simultaneously over a number of orthogonal subcarriers. It provides the high data rate and high frequency spectral efficiency and low implementation complexity [2]. Because of these advantages, OFDM is us...

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 an efficient modulation technique which can be used for both broadband wired and wireless communication. OFDM is now becoming widely popular among the multicarrier communication systems because of its immunity to Inter Symbol Interference (ISI), Inter Carrier Interference (ICI), impulse noise etc. and also it has high spectral efficiency. Stu...

This paper presents a new hybrid PAPR reduction technique for the OFDM signal, which combines a sequential tone reservation method with a signal clipping method. The simulation results highlight the advantages of the proposed PAPR reduction method.

This proposed method reduces the peak-to-average power ratio (PAPR) of multi-carrier transmission, by exploiting null subcarriers, already mandated in most OFDM wireless standards. This new approach requires no channel side information, can be compatible with existing standards, imposes no rate hit, is distortionless, has low computational complexity, and can complement most other PAPR-reductio...

High peak values of transmission signals in wireless communication systems lead to wasteful energy consumption and out-of-band radiation. However, reducing peak values generally comes at the cost some other resource. We provide a theoretical contribution towards understanding the relationship between peak value reduction and the resulting cost in information rates. In particular, we address the...