Precoded OFDMA with Superimposed Pilots 


Vol. 34,  No. 11, pp. 1059-1066, Nov.  2009


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  Abstract

In this paper, we propose the precoder with superimposed pilots for orthogonal frequency-division multiple access (OFDMA) systems in order to enhance the transmission efficiency of the system and reduce peak-to-average power ratio (PAPR) which is the problem in OFDMA uplink. In wireless communication systems, the way to improve transmission efficiency is 1) to reduce bit error rate (BER) or 2) to increase data rate. In the proposed scheme, we design the precoder and superimposed pilots in the transmitter and use them in the receiver for increasing data rate, caused by the saved transmission bandwidth thanks to the superimposed pilots. In addition, we improve BER performance with the help of the frequency diversity gain caused by precoding. Also using superimposed pilots, we enhance the PAPR performance by increasing the average output power of the signal.

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  Cite this article

[IEEE Style]

S. Kim and S. Jung, "Precoded OFDMA with Superimposed Pilots," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 1059-1066, 2009. DOI: .

[ACM Style]

Sunghwan Kim and Sung-Yoon Jung. 2009. Precoded OFDMA with Superimposed Pilots. The Journal of Korean Institute of Communications and Information Sciences, 34, 11, (2009), 1059-1066. DOI: .

[KICS Style]

Sunghwan Kim and Sung-Yoon Jung, "Precoded OFDMA with Superimposed Pilots," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 1059-1066, 11. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880