A composite LMMSE channel estimator for spectrum-efficient OFDM transmit diversity

Jeong Wook Seo, Won Gi Jeon, Jong Ho Paik, Minho Jo, Dong Ku Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this paper, we propose a subcarrier allocation method and a composite linear minimum mean square error (LMMSE) channel estimator to increase spectrum efficiency in orthogonal frequency division multiplexing (OFDM) transmit diversity. The pilot symbols for OFDM transmit (Alamouti) diversity are exclusively allocated in two OFDM symbols in different antennas, which causes serious degradation of spectrum efficiency. To reduce the number of pilot symbols, our subcarrier allocation method uses repetition-coded data symbols, and the proposed channel estimator maintains good bit error rate (BER) performance.

Original languageEnglish
Pages (from-to)209-221
Number of pages13
JournalKSII Transactions on Internet and Information Systems
Issue number4
Publication statusPublished - 2008 Aug

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications


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