Optimal pilot sequence design for multi-cell MIMO-OFDM systems

Jae Won Kang, Younghoon Whang, Hyung Yeol Lee, Kwang Soon Kim

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


In this paper, optimal pilot sequence designs for MIMO-OFDM systems in multi-cell environments are provided. The proposed multi-cell optimality criterion is to minimize the worst-case MSE of an LS-based channel estimator. To satisfy the multi-cell optimality, it is found that the pilot sequence set, having the perfect auto-correlation property, should meet the Welch bound and the maximum magnitude of the cross-correlation function should be further minimized. Multi-cell optimal pilot sequence designs for various pilot types and their DFT representations are proposed by adopting Chu sequences and a tight upper-bound on the maximum size of the pilot sequence set is derived for a given pilot sequence length and the maximum allowed cross-correlation value. Simulation results show that the proposed pilot sequences can improve both the MSE performance and the system performance in multi-cell environments.

Original languageEnglish
Article number6002423
Pages (from-to)3354-3367
Number of pages14
JournalIEEE Transactions on Wireless Communications
Issue number10
Publication statusPublished - 2011 Oct

Bibliographical note

Funding Information:
This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency (NIPA-2011-(C1090-1111-0005)).

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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