Co-Channel Interference Cancellation in Cellular OFDM Networks 


Vol. 32,  No. 5, pp. 409-416, May  2007


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  Abstract

In cellular orthogonal frequency division multiplexing (OFDM) networks, co-channel interference (CCI) leads to severe degradation in the BER performance. To solve this problem, maximum-likelihood estimation (MLE) CCI cancellation scheme has been proposed in the literature. MLE CCI cancellation scheme generates weighted replicas of the transmitted signals where weights represent the estimated channel transfer functions. The replica with the smallest Euclidean distance from the received signal is selected and data are detected. When the received power of the desired and interference signals are nearly the same, the BER performance is degraded. In this paper, we propose a closed-loop power control (PC) scheme capable of detecting the equal received power situation at the mobile station (MS) receiver by using the newly introduced parameter power ratio (PR). When this situation is detected, the MS sends a fee㏈ack to the desired base station (BS) which boosts the transmission power in the next frame. At cell edge where signal to interferer ratio (SIR) is considered to have average value between -5 ㏈ and 10 ㏈, computer simulations show that the proposed CCI cancellation scheme has a gain of 7 ㏈ at 28 Km/h.

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  Cite this article

[IEEE Style]

M. Mohaisen and K. Chang, "Co-Channel Interference Cancellation in Cellular OFDM Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 409-416, 2007. DOI: .

[ACM Style]

Manar Mohaisen and KyungHi Chang. 2007. Co-Channel Interference Cancellation in Cellular OFDM Networks. The Journal of Korean Institute of Communications and Information Sciences, 32, 5, (2007), 409-416. DOI: .

[KICS Style]

Manar Mohaisen and KyungHi Chang, "Co-Channel Interference Cancellation in Cellular OFDM Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 409-416, 5. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880