Modified SLM combined with interleaving and pulse shaping method based on PAPR reduction using DCT OFDM system

Sujatha, S.; Dananjayan, P.

doi:10.1109/icaccct.2016.7831609

Cited by 5 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, such effects are often mitigated when filtering is employed after clipping. Conversely, SLM has disadvantaged because of multiple inverse fast Fourier transform (IFFT) blocks and the computational complexity, which is directly proportional to the scale of the phase vector matrix required to realize the most effective PAPR performance [14].On the opposite hand, Partial Transmit Sequence (PTS) has been the most promising one because of its good PAPR reduction capability without restriction on the amount of subcarriers [15]. In PTS, the data block which is split into disjoint sets called subblocks and also the subblocks are combined followed by multiplication of a phase vector.…”

Section: Objectivesmentioning

confidence: 99%

Untitled

2022

IJANS

View full text Add to dashboard Cite

Orthogonal frequency division multiplexing (OFDM) has become an important component of waveform generation in wideband transmission. it's a superior technology for the high-speed rate of wired and wireless communication systems. Currently, multiple-input multiple-output orthogonal frequency division multiplexing (MIMO OFDM) systems are crucial wireless communication systems like 4G and 5Gnetworks & tactical communication. The OFDM has many advantages over other techniques like its high capacity and immunity against multipath fading channels. However, one amongst the foremost drawbacks of the OFDM system is that the high-peak-to-average power ratio (PAPR) that leads the system to provide in-band distortion and out-of-band radiation and reduces its efficiency. This problem increases with a rise within the number of transmit antennas. Therefore, it's highly desirable to cut back the PAPR of an OFDM signal. For this, numerous techniques are proposed to beat the PAPR problem like i) Selective mapping (SLM) ii) Partial transmit sequence (PTS), iii) Clipping, iv) Clipping and filtering. All of those are reduced the PAPR by generating alternative subcarrier vector that are statistically independent OFDM symbols for a given data frame and transmitting the symbol with rock bottom peak power. During this paper we also proposed, some hybrid techniques. The hybrid techniques are the technique of clipping is employed in conjunction with SLM and PTS to cut back computational complexity. And also the combination of SLM-PTS to scale back PAPR. Simulations are acquainted with analyze the efficiency of the techniques used which signifies OFDM to be providing much better PAPR reduction and a way better Bit Error Rate (BER). it's shown in simulation results that the proposed scheme performs well reducing PAPR. But the proposed scheme is more complex than the prevailing techniques.

show abstract

Section: Objectivesmentioning

confidence: 99%

Untitled

2022

IJANS

View full text Add to dashboard Cite

show abstract

“…On the other hand , Partial Transmit Sequence (PTS) has been the most promising one due to its good PAPR reduction capability without restriction on the number of subcarriers [ 17 ]. In PTS ,the data block which is divided into disjoint sets called subblocks and the subblocks are combined followed by multiplication of a phase vector.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2022

IJANS

View full text Add to dashboard Cite

Orthogonal frequency division multiplexing (OFDM) has become an indispensable part of waveform generation in wideband digital communication since its first appearance in digital audio broadcasting(DAB)and it is indeed in use. These descriptions are simplified version of the detailed descriptions provided by 3gpp. It is a superior technology for the high-speed data rate of wire-line and wireless communication systems. The OFDM has many advantages over other techniques such as its high capacity and immunity against multipath fading channels. However ,one of the main drawbacks of the OFDM system is the high-peak-to-average power ratio (PAPR) that leads the system to produce in-band distortion and out-of-band radiation because of the non-linearity and reduces its efficiency is the distortion of the signal caused at the High Power Amplifier (HPA) of a transmitter . Therefore, it is highly desirable to reduce the PAPR of an OFDM signal. For this, numerous techniques have been proposed to overcome the PAPR problem such as i) selective mapping(SLM) ii) partial transmit sequence (PTS), iii) clipping, iv) clipping and filtering. In this paper, the PTS technique was analytically reviewed as one of the important methods to reduce the high PAPR problem. Simulations are used to analyze the efficiency of the techniques used which signifies OFDM to be providing much better PAPR reduction and a better Bit Error Rate (BER) . From simulation results clipping method shows good PAPR reduction with significant amount of BER degradation. Clipping and filtering method shows slight increase in PAPR with small degradation in BER performance than Clipping method and both methods are computationally less complex. PTS provides good PAPR reduction with high computational complexity.

show abstract

“…However, in TR, thorough computations are required in order to set the appropriate values on the reserved sub‐carriers. Other techniques are based on multiple signal representation techniques or probabilistic techniques such as the partial transmit sequence (PTS) technique [15] and selected mapping (SLM) technique [16]. These methods act on the phase of the data sub‐carriers in order to mitigate the PAPR.…”

Section: Introductionmentioning

confidence: 99%