Robust frequency offset estimation for pilot symbol assisted packet CDMA with MIMO antenna systems

Dae Ki Hong, Young Jo Lee, Daesik Hong, Chang Eon Kang

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We propose frequency offset estimation and combining techniques for pilot symbol assisted (PSA) packet downlink code-division multiple access (CDMA) with multiple-input and multiple-output (MIMO) antenna systems. Orthogonal Walsh codes are used for dedicated pilot symbols at the transmit antennas. Discrete Fourier transform (DFT)-based frequency offset estimation is used for simple implementation. In addition, simple interpolation is also used for resolution improvement of the DFT. When identical frequency offset is assumed, the frequency offset estimates for each single-input single-output (SISO) sub-stream (i.e., transmit/receive antenna pair) can be combined at the receiver. Simulation results show that the estimation and combining techniques proposed here deliver improvement in the frequency offset estimation performance.

Original languageEnglish
Pages (from-to)262-264
Number of pages3
JournalIEEE Communications Letters
Issue number6
Publication statusPublished - 2002 Jun

Bibliographical note

Funding Information:
Manuscript received January 22, 2002. The associate editor coordinating the review of this letter and approving it for publication was Dr. N. Van Stralen. This work was supported by Brain Korea 21 Projects, and LG Electronics.

All Science Journal Classification (ASJC) codes

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

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