Frequency-domain interpolation-based channel estimation in pilot-aided OFDM systems

Pei Yun Tsai, Tzi Dar Chiueh

Research output: Contribution to journalConference articlepeer-review

47 Scopus citations


In this paper, we propose a novel frequency-domain interpolation algorithm for channel estimation in comb-type pilot-aided orthogonal frequency-division multiplexing (OFDM) systems. There exist two major types of pilot-aided OFDM channel estimation methods: time-domain and frequency-domain. We show that these two estimation methods have mathematical equivalence. The performance of these channel estimators mainly depends on how the channel impulse response (CIR) is reconstructed from frequency-domain channel response sample at the pilot sub-carriers. By closely examining time-domain CIR characteristics, we propose a new frequency-domain interpolation-based algorithm that can overcome the limitation of conventional frequency-domain algorithms. Meanwhile, this new algorithm has the advantages of less latency and computation complexity when compared to time-domain approaches. Simulation results show that the proposed algorithm outperforms frequency-domain interpolation-based and time-domain algorithms in most cases.

Original languageEnglish
Pages (from-to)420-424
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number1
StatePublished - 2004
Event2004 IEEE 59th Vehicular Technology Conference, VTC2004-Spring: Towards a Global Wireless World - Milan, Italy
Duration: 17 May 200419 May 2004


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