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| IIn this paper the objective is to describe the PAPR in the SCFDMA and OFDMA, and then make analyze for good performance of PAPR, from the comparative study for some PAPR reduction method. Finally the best one of them has been proposed for PAPR reduction. As we know, the 3GPP LTE ensures long-term competitiveness of UMTS for the applications of radio broadband and mobile TV. This technology will bring theoretical peak rates to above 100 Mbps for downlink and 50 Mbps for uplink and reduce latency to levels comparable with fixed broadband internet. In addition, improvements should be significant with regard to access time 3-4 HSPDA for MIMO in DL and 2-3 times HSUPA for MIMO in UL, capacity and spectral efficiency. LTE is optimized for low speeds 0-15 km/h but mobility is maintained for speeds up to 350 km/h. The data transmission between the base station and mobile technology uses OFDMA (orthogonal frequency division multiple access) was already used for WiMAX. For the uplink, the LTE of the 3GPP employs SC-FDMA due to its low PAPR properties compared to OFDMA. SC-FDMA is a technology using single-carrier modulation and frequency domain equalization. The orthogonal frequency division multiple access based on OFDM technology is used in LTE downlink. However, there is a big drawback of OFDMA: the problem of high PAPR. |
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| Keywords:3GPP LTE; SC-FDMA; OFDMA; PAPR; SLM; PTS |
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