Multicarrier Waveform (MCW) has several advantages and plays a very important role in cellular systems. Fifth generation (5G) MCW such as Non-Orthogonal Multiple Access (NOMA) and Filter Bank Multicarrier (FBMC) are thought to be important in 5G implementation. High Peak to Average Power Ratio (PAPR) is seen as a serious concern in MCW since it reduces the efficiency of amplifier use in the user devices. The paper presents a novel Divergence Selective Mapping (DSLM) and Divergence Partial Transmission Sequence (D-PTS) for 5G waveforms. It is seen that the proposed D-SLM and PTS lower PAPR with low computational complexity. The work highlighted a combination of multi-data block partial transmit schemes along with tone reservation. In this, an overlapping factor is used to determine the number of data blocks for every group. Here, considering only those data blocks that have minimum signal power, the use of DSLM and DPTS are required to eliminate the segment’s peaks. Simulation results reveal that the suggested hybrid technique proves to be better than the conventional PTS scheme. Furthermore, the power saving performance of FBMC and NOMA is compared with the Orthogonal Frequency Division Multiplexing (OFDM) waveform.

Wireless applications play an important role in improving the quality of life in every sector, including education, industry, and healthcare [

We aim to investigate the PAPR reduction algorithms for the 5G waveform.

We proposed a novel hybrid algorithm for the 5G waveform.

In MCWT, the data is transmitted by dividing a single carrier into a number of subcarriers. In the last several years, several waveform methods have been studied and concluded that PAPR is one of the big issues in multicarrier waveforms.

The structure of the OFDM waveform is given in

The OFDM symbol can be represented as:

Here E is the expected operator.

The structure of FBMC is shown in

The FBMC transmitted signal is given by:

In this case y_{k} is the FBMC symbol for

The PAPR of FBMC is given by:

The Complementary Cumulative Distribution Function (CCDF) is used to analyze the efficacy of PAPR algorithms, which is represented as:_{t} is the threshold value.

The schematic of the NOMA structure is given in

Considering

In recent years, there have been several PAPR algorithms investigated for OFDM and 5G waveforms.

Let us consider symbols mapped into the 64-QAM transmission scheme. Those symbols are loaded into parallel order, given as

An IFFFT is applied to the

Thereafter, the signal with the minimum PAPR value is transmitted, given by:

The

Let us consider a complex multicarrier signal for

The

Hence,

To lower the PAPR, the time domain sequence

The

The ideal

We have used Matlab-2014 to implement the PAPR algorithm techniques for multi-carrier waveforms. The key design factors are given in

S. No | Parameters |
---|---|

1 | Sub-carriers = 64 |

2 | Sub-blocks = 4, 8, 16 |

3 | Phase rotation elements (w) = 2 |

4 | FFT size = 512 |

5 | Channel = Rayleigh channel |

In this section, we have analysed the efficiency of the D-PTS algorithm on NOMA, FBMC, and OFDM waveforms. It is seen that the D-PTS effectively reduces the PAPR of the waveforms and outperforms the conventional PTS method. Further, it is noted that by increasing the number of sub-blocks, the ideal PAPR value is obtained as

Finally, it is concluded that the proposed D-SLM gave an efficient PAPR performance and outperformed the D-PTS for the given waveforms.

In this part, we have studied the BER analysis of NOMA waveform after applying the proposed D-PTS and D-SLM algorithms to the Rayleigh channel. The proposed D-SLM, D-PTS (u = 16, 8 and w = 2) and conventional SLM and PTS achieved the BER of 10^{−5} at the SNRs of 4.2, 6.3, 7.5, 8.1, 8.7, and 9.2 dB as shown in

The work highlighted a combination of multi-data block DPTS and DSLM along with tone reservation. In this, an overlapping factor is used to determine the number of data blocks for every group. Here, considering only those data blocks that have minimum signal power, the use of a phase rotation element (w) is required to eliminate the segment’s peaks. Simulation results reveal that the suggested hybrid PTS-TR technique proves to be better than the conventional PTS scheme. The requirement of side information for each data block results in losses in data rates in selective mapping techniques. A novel D-SLM method has been proposed to reduce the complexity of the waveforms. The evaluation outcome shows that the suggested methods provide better performance in the reduction of PAPR and also promise a better BER.