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A Method for Improving Performance of OFDM System by Using Cyclic Prefix

Yi Wan

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Abstract

Recently orthogonal frequency division multiplexing(OFDM) has received more and more attention and applied to IEEE 802.11 wireless LAN.In a traditional OFDM system,the cyclic prefix is simply deleted during signal detection at the receiver,and the remaining portion of the received signal is used for processing,hence some useful information in the CP is not used.In this paper,an LS-based method is proposed,which uses the CP to help signal recovery and present its simulation result.As it turns out,for long CP,this method produces lower symbol error rate than the traditional method.

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What this paper is about

Recently orthogonal frequency division multiplexing(OFDM) has received more and more attention and applied to IEEE 802.11 wireless LAN.In a traditional OFDM system,the cyclic prefix is simply deleted during signal detection at the receiver,and the remaining portion of the received signal is used for processing,hence some useful information in the CP is not used.In this paper,an LS-based method is proposed,which uses the CP to help signal recovery and present its simulation result.As it turns out,for long CP,this method produces lower symbol error rate than the traditional method.

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Available abstract

Recently orthogonal frequency division multiplexing(OFDM) has received more and more attention and applied to IEEE 802.11 wireless LAN.In a traditional OFDM system,the cyclic prefix is simply deleted during signal detection at the receiver,and the remaining portion of the received signal is used for processing,hence some useful information in the CP is not used.In this paper,an LS-based method is proposed,which uses the CP to help signal recovery and present its simulation result.As it turns out,for long CP,this method produces lower symbol error rate than the traditional method.

Key concepts: Cyclic prefix, Orthogonal frequency-division multiplexing, Computer science, SIGNAL (programming language), Prefix, Algorithm, Wireless, Real-time computing

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