ZCT precoding based slm technique for PAPR reduction
| dc.contributor.author | Loo, Twan Zhan | |
| dc.date.accessioned | 2021-04-23T02:10:32Z | |
| dc.date.available | 2021-04-23T02:10:32Z | |
| dc.date.issued | 2017-06 | |
| dc.description.abstract | Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation scheme that is being used in wireline and wireless digital communications for several years ago. The function of the OFDM is to reduce delay spread, inter symbol interference (ISI), inter channel interference (ICI) and frequency selective fading due to the multipath. However, the major drawback of OFDM system is high value of Peak to Average Power Ratio (PAPR). PAPR is one of the important parameters to ensure the best transmission efficiency. In this paper, Zadoff-Chu matrix Transform (ZCT) precoded Selected Mapping (SLM) based OFDM (SLM-OFDM) system is proposed for PAPR reduction. This technique is based on precoding the constellation symbols with ZCT precoder after the multiplication of phase rotation factor and before the Inverse Fast Fourier Transform (IFFT) in the SLM based OFDM (SLM-OFDM) Systems. At the beginning of the project, parameters of the system are initialized. The binary signal is undergoes modulation schemes which are QPSK, 4QAM, 16QAM, 64QAM and 256QAM. The modulated signal is multiplied with the phase factor and pass through the ZCT with row wise precoder matrix before entering IFFT. Then select one of the transmitted signal with the least PAPR and PAPR is evaluated by using Complementary Cumulative Distribution Function (CCDF). The simulation results of PAPR performance are tabulated. At the clipping rate of 10−3, simulation results show that the proposed system can reduce the PAPR up to 6.8 dB with 𝑁 = 64 or 256 (System subcarriers) and 𝑉 = 16 (Dissimilar phase sequences) for 4QAM modulation. In additional, ZCT based SLM-OFDM system can avoid signal degradation in performance when passes through a nonlinear High-Power-Amplifier (HPA). | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/13101 | |
| dc.language.iso | en | en_US |
| dc.subject.lcsh | Power amplifiers | |
| dc.title | ZCT precoding based slm technique for PAPR reduction | en_US |
| dc.type | Other | en_US |
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