Presently, orthogonal frequency division multiplexing (OFDM) as a multicarrier transmission system is widely used. Along with its advantages it has many disadvantages. One of its major drawback is high peak to average power ratio (PAPR). As with high PAPR the spectral efficiency of the high power amplifiers degrades. So it becomes necessary to maintain the efficiency of a wireless system to red...

The low peak-to-average power ratio (PAPR) in single-carrier systems has motivated the Long Term Evolution (LTE) Third Generation Partnership Project (3GPP) to adopt single carrier frequency division multiple access (SC-FDMA) as the uplink multiple access scheme. In this paper, an enhancement of a SC-FDMA system by decreasing the PAPR is focused. A combination of clipping and Pulse shaping (RRC...

Multicarrier Code Division Multiple Access (MC-CDMA) is the most promising technique for high speed data transmission. However, the MC-CDMA signals are characterized by large peak-to-average power ratios (PAPR), which can reduce the system efficiency. In this paper, SLM and PTS techniques are investigated and their performances are compared. The performance metric utilized in evaluating PAPR re...

orthogonal frequency division multiplexing is a technique for transmitting large data over radio waves. The main drawback of OFDM is Peak to average power ratio(PAPR). This paper present all proposed techniques to reduce PAPR. These proposed techniques show better performance to reduce PAPR.

Peak to average power ratio (PAPR) distribution of the periodic orthogonal frequency division multiplexing (OFDM) symbol sequences is evaluated and it is shown that the OFDM symbol sequence with short period is expected to have high PAPR. PAPR bound of two sequences with Hamming distance D is derived. Using these results, we identify two conditions for the optimal phase sequences of selected ma...

There are many benefits of utilizing OFDM like robustness and high spectral efficiency against ISI but still there are some disadvantages. The main problem that arises in OFDM systems is high PAPR. There are many techniques available for reduction of PAPR like tone reservation (TR), clipping and filtering, partial transmit sequence (PTS), active constellation scheme, interleaving and selected m...

Orthogonal frequency division multiplexing (OFDM) suffers from a high peak to average power ratio (PAPR). Tone reservation (TR) technology is considered as one of the most promising methods because of no additional distortion, no side information, and low implementation cost. However, in all PAPR reduction schemes,determining the optimal target clipping level is difficult. In this paper, we con...

Orthogonal frequency division multiplexing (OFDM) suffers from a high peak to average power ratio (PAPR). Tone reservation (TR) technology is considered as one of the most promising methods because of no additional distortion, no side information, and low implementation cost. However, in all PAPR reduction schemes, determining the optimal target clipping level is difficult. In this paper, we co...

One of the challenging issues in today’s OFDM system which is MCM is to handle high PAPR of the transmitted OFDM signals. The OFDM receiver detection efficiency is very much sensitive to nonlinear devices used in signal processing such as HPA and DAC. The criterion of PAPR reduction is to find methodology which can reduce PAPR drastically and at the same time it can keep reasonably good perform...

Orthogonal frequency division multiplexing (OFDM) has gained much popularity in the field of wireless communication because of its ability to transfer the data at higher rate, high bandwidth efficiency and its robustness to multipath. Since OFDM has high Peak to Average Power Ratio (PAPR) as major limitation, many techniques were proposed to reduce it. In this paper, a DCT based modified select...