Cost-effective residual frame synchronization error cancellation for comb-type pilot-aided OFDM systems

Seongjoo Lee, Jaedeok Kim, Yunho Jung, Jaeseok Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A lot of conventional algorithms have tried to cancel the residual frame synchronization error (RFSE), which causes the performance degradation of channel estimation when using interpolation between pilot sub-carriers in comb-type pilot-aided OFDM systems. Among them, a tracking method has been attractive to provide good performance by eliminating the effects of RFSE. However, it requires high computational complexity because of its compensation process including many complex multiplications. In this paper, we propose a new method which significantly reduces computational costs by adjusting the starting point of FFT window in order to compensate for the RFSE. For the performance verification, we apply the proposed method to the IEEE 802.16e mobile WiMAX system and estimate its computational power compared to the tracking method. Simulation and implementation results show that the proposed algorithm has the performance similar to the tracking method and is very efficient for low power implementation in comb-type pilot-aided OFDM systems because it consumes only 40.5% of the tracking method's power1.

Original languageEnglish
Article number5373737
Pages (from-to)1819-1824
Number of pages6
JournalIEEE Transactions on Consumer Electronics
Volume55
Issue number4
DOIs
Publication statusPublished - 2009 Nov 1

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Orthogonal frequency division multiplexing
Synchronization
Costs
Channel estimation
Fast Fourier transforms
Computational complexity
Interpolation
Degradation
Compensation and Redress

All Science Journal Classification (ASJC) codes

  • Media Technology
  • Electrical and Electronic Engineering

Cite this

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abstract = "A lot of conventional algorithms have tried to cancel the residual frame synchronization error (RFSE), which causes the performance degradation of channel estimation when using interpolation between pilot sub-carriers in comb-type pilot-aided OFDM systems. Among them, a tracking method has been attractive to provide good performance by eliminating the effects of RFSE. However, it requires high computational complexity because of its compensation process including many complex multiplications. In this paper, we propose a new method which significantly reduces computational costs by adjusting the starting point of FFT window in order to compensate for the RFSE. For the performance verification, we apply the proposed method to the IEEE 802.16e mobile WiMAX system and estimate its computational power compared to the tracking method. Simulation and implementation results show that the proposed algorithm has the performance similar to the tracking method and is very efficient for low power implementation in comb-type pilot-aided OFDM systems because it consumes only 40.5{\%} of the tracking method's power1.",
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Cost-effective residual frame synchronization error cancellation for comb-type pilot-aided OFDM systems. / Lee, Seongjoo; Kim, Jaedeok; Jung, Yunho; Kim, Jaeseok.

In: IEEE Transactions on Consumer Electronics, Vol. 55, No. 4, 5373737, 01.11.2009, p. 1819-1824.

Research output: Contribution to journalArticle

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