Performance Analysis of Asynchronous OFDMA Uplink Systems with Timing Misalignments over Frequency-selective Fading Channels 


Vol. 30,  No. 2, pp. 34-42, Feb.  2005


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  Abstract

In orthogonal frequency-division multiple access (OFDMA) uplink environments, asynchronously received signals can cause multiple access interference (MAI). This paper focuses on the performance degradation due to the MAI over frequency-selective fading channels. We first introduce the timing misalignment, which is defined as the relative timing difference between asynchronous timing error of uplink user and reference time of the base station, and analytically derive the MAI using the power delay profile of wide-sense stationary uncorrelated scattering (WSSUS) channel model. Then, the effective signal-to-noise ratio (SNR) and the average symbol error probability (SEP) are derived. The proposed analytical results are verified through simulations with respect to the region of the timing misalignment and the number of asynchronous users.

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  Cite this article

[IEEE Style]

M. Park, K. Ko, B. Park, Y. Lee, D. Hong, "Performance Analysis of Asynchronous OFDMA Uplink Systems with Timing Misalignments over Frequency-selective Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 34-42, 2005. DOI: .

[ACM Style]

Myonghee Park, Kyunbyoung Ko, Byungjoon Park, Young-Il Lee, and Daesik Hong. 2005. Performance Analysis of Asynchronous OFDMA Uplink Systems with Timing Misalignments over Frequency-selective Fading Channels. The Journal of Korean Institute of Communications and Information Sciences, 30, 2, (2005), 34-42. DOI: .

[KICS Style]

Myonghee Park, Kyunbyoung Ko, Byungjoon Park, Young-Il Lee, Daesik Hong, "Performance Analysis of Asynchronous OFDMA Uplink Systems with Timing Misalignments over Frequency-selective Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 34-42, 2. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880