Earticle

초록

영어

IEEE 802.11p defines an international standard for wireless access in vehicular environments. It is normally designed for operating at high user mobility. Thus, decreasing the signal bandwidth to 10 MHz in IEEE 802.11p makes the communication more efficient for the vehicular channel. Furthermore, the Orthogonal Frequency Division Multiplexing (OFDM) methodology is commonly used to mitigate the Inter-Symbol Interference (ISI) occurred over a wireless channel. However, the OFDM suffers from certain drawbacks including higher system complexity due to the generation of the peak to average ratio (PAPR). The objective of this study is to reduce the high PAPR resulted from adapting the OFDM system to vehicular networks. In this paper, we propose a novel precoding Zadoff-Chu Sequence (ZCS) combined with the Clipping technique for PAPR reduction in OFDM based on the Discrete Cosine Transform (DCT). The proposed technique which is based on precoding the constellation symbols of the vehicular channels with DCT succeeds to decrease the PAPR ratio up to 4dB for 64 subcarriers.

목차

Abstract
 1. Introduction
 2. Literature Review
 3. Vehicular OFDM Overview
  3.1. Classical OFDM
  3.2. Vehicular Channel Characteristics
  3.3. OFDM-PARP Properties
 4. The Proposed Model
  4.1. Conventional ZCS Technique
  4.2. Clipping-DCT Technique
  4.3. Hybrid ZCS Transform Based on Clipping DCT
 5. Simulation Results and Analysis
 6. Conclusion
 Acknowledgements
 References

키워드

저자

• Ahmed Ali [ College of Information Science and Engineering, Hunan University, 410082, Changsha, China ]
• Wang Dong [ College of Information Science and Engineering, Hunan University, 410082, Changsha, China ]
• Li Renfa [ College of Information Science and Engineering, Hunan University, 410082, Changsha, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Hybrid Information Technology

• 간기

  격월간

• pISSN

  1738-9968

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605