Performance analysis of OFDMA uplink systems with symbol timing misalignment

Myonghee Park, Kyunbyoung Ko, Hwasun Yoo, Daesik Hong

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


This letter presents our investigation for the effect of symbol timing errors in orthogonal frequency-division multiple access (OFDMA) uplink systems. We express the symbol timing errors between users as the symbol timing misalignments with respect to the desired user. Then, we derive an explicit expression of the signal-to-noise ratio (SNR) as a function of the maximum value of the symbol timing misalignments. Analyses and simulation results show that, to achieve an SNR of 20 dB, the maximum value of the symbol timing misalignments must be less than the cyclic prefix duration plus 6.25% of the useful symbol duration. Based on the resulting SNR degradation, we evaluate the SNR gain with guard subcarriers in order to mitigate the effect of the symbol timing misalignments.

Original languageEnglish
Pages (from-to)376-378
Number of pages3
JournalIEEE Communications Letters
Issue number8
Publication statusPublished - 2003 Aug

Bibliographical note

Funding Information:
Manuscript received . The associate editor coordinating the review of this letter and approving it for publication was Prof. F. Jondral. This work was supported by Korea Institute of Industrial Technology Evaluation and Planning (KITEP).

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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