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Comparison of Achievable Rates of OFDM and Single Carrier Communication Systems 被引量:3

Comparison of Achievable Rates of OFDM and Single Carrier Communication Systems
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摘要 This paper presents a theoretical comparison of a single carrier system and a multi-carrier system through an analysis of the achievable rate under frequency selective fading with channel state information at the receiver. A scheme was designed to compare the achievable rates of a single carrier system and an Or- thogonal Frequency Division Multiplexing (OFDM) system. A thorough theoretical analysis of the two-path channel was conducted, and simulations were also used to analyze practical stochastic channels. Analysis and simulation results show that the achievable rates of the two approaches are comparable when the channel is flat fading. However, when the channel is frequency selective fading, the single carrier system outperforms the OFDM system. The achievable rate of the OFDM system is about 10% lower than that of the single carrier system at higher SNRs. This paper presents a theoretical comparison of a single carrier system and a multi-carrier system through an analysis of the achievable rate under frequency selective fading with channel state information at the receiver. A scheme was designed to compare the achievable rates of a single carrier system and an Or- thogonal Frequency Division Multiplexing (OFDM) system. A thorough theoretical analysis of the two-path channel was conducted, and simulations were also used to analyze practical stochastic channels. Analysis and simulation results show that the achievable rates of the two approaches are comparable when the channel is flat fading. However, when the channel is frequency selective fading, the single carrier system outperforms the OFDM system. The achievable rate of the OFDM system is about 10% lower than that of the single carrier system at higher SNRs.
出处 《Tsinghua Science and Technology》 EI CAS 2012年第1期73-77,共5页 清华大学学报(自然科学版(英文版)
基金 Supported by the National Key Technology Research and Devel-opment Program (No. 2009ZX03006-007-02) the National Natural Science Foundation of China (Nos. 60972019, 61021001,and 60928001)
关键词 achievable rate frequency selective channels single carrier orthogonal frequency division mul-tiplexing channel state information at the receiver achievable rate frequency selective channels single carrier orthogonal frequency division mul-tiplexing channel state information at the receiver
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同被引文献22

  • 1苏威,潘志文.基于DFT的OFDM系统信道估计改进算法[J].无线通信技术,2007,16(4):1-5. 被引量:12
  • 2Tomasoni A,Gatti D,Bellini S.Efficient OFDM channel estimation via an information criterion[J].IEEE Transactions on Wireless Communication,2013,58(5):1352-1362.
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  • 7Lee Y S,Shin H C,Kim H N.Channel estimation based on a timedomain threshold for OFDM systems[J].IEEE Transactions on Broad Casting,2009,55(3):657-661.
  • 8Wang X Q,Wang J T,Wang Z C.Improved DFTbased channel estimation for OFDM systems over multipath channels[C]//Proceedings of the 6th International Wireless Communications and Mobile Computing Conference.Caen,2010:585-590.
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