Block Coding Techniques with Cyclic Delay Diversity for OFDM Systems 


Vol. 33,  No. 9, pp. 867-873, Sep.  2008


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  Abstract

Cyclic delay diversity (CDD) is considered as a simple approach to exploit the frequency diversity in OFDM system. In this paper, we apply CDD to the conventional STBC/SFBC/STFBC-OFDM transmit diversity schemes for Rayleigh fading channels. We compare the performances of STBC/SFBC/STFBC with and without CDD schemes. Simulation results show that the combination of block coding with CDD works well when using the ITU-R M. 1225 channel for both Pedestrian A (Ped A) channel with the mobility of 3 ㎞/h, and Vehicular A (Veh A) channel with the mobility of 120 ㎞/h. For a BER of 10-3, compared to the conventional block coding schemes, a gain of 2 ㏈, 4 ㏈, and 5 ㏈ is obtained under the Ped A channel environment by STBC-OFDM, SFBC-OFDM and STFBC-OFDM with CDD, respectively. Under the Veh A channel, gains by the combined schemes are 6 ㏈, 2 ㏈, and 4 ㏈, respectively.

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  Cite this article

[IEEE Style]

T. Du, B. Hui, K. Chang, "Block Coding Techniques with Cyclic Delay Diversity for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 9, pp. 867-873, 2008. DOI: .

[ACM Style]

Ting Du, Bing Hui, and KyungHi Chang. 2008. Block Coding Techniques with Cyclic Delay Diversity for OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 33, 9, (2008), 867-873. DOI: .

[KICS Style]

Ting Du, Bing Hui, KyungHi Chang, "Block Coding Techniques with Cyclic Delay Diversity for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 9, pp. 867-873, 9. 2008.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880