Improved OFDM System with Carrier Interferometry Codes in Highly Dispersive Fading Channels 


Vol. 29,  No. 4, pp. 378-383, Apr.  2004


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  Abstract

Orthogonal Frequency Division Multiplexing (OFDM) transmits high-speed data by splitting the transmission bandwidth into a number of subcarriers. The bandwidth of each subcarrier is ensured to be smaller than the coherence bandwidth. This paper presents an OFDM system incorporated with the Carrier Interferometry (CI) codes to improve the performance by enhancing frequency diversity effect. The performances of CI-OFDM with multilevel modulations are investigated in highly dispersive fading channels. For the investigation of performance improvement of CI-OFDM, a simulator has been developed using a well-known SPW simulation platform. The simulation results show that the CI-OFDM provides both performance improvement and robustness against dispersive fading channel behavior. The performance of CI-OFDM with multilevel modulations demonstrates that CI-OFDM outperforms a traditional OFDM system, particularly in highly dispersive channels. With a relatively large delay spread of 151ns compared to the guard interval of 800ns, CI-OFDM provides a BER of 10??³ if sufficient signal power is present.

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  Cite this article

[IEEE Style]

Y. Chung, "Improved OFDM System with Carrier Interferometry Codes in Highly Dispersive Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 4, pp. 378-383, 2004. DOI: .

[ACM Style]

Yeon-Ho Chung. 2004. Improved OFDM System with Carrier Interferometry Codes in Highly Dispersive Fading Channels. The Journal of Korean Institute of Communications and Information Sciences, 29, 4, (2004), 378-383. DOI: .

[KICS Style]

Yeon-Ho Chung, "Improved OFDM System with Carrier Interferometry Codes in Highly Dispersive Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 4, pp. 378-383, 4. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880