Pilot-assisted decision feedback channel estimation for STTD in OFDM mobile radio

Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this paper, we propose pilot-assisted decision feedback channel estimation (PA-DFCE) for space-time coded transmit diversity (STTD) in orthogonal frequency division multiplexing (OFDM). Two transmit channels are simultaneously estimated by transmitting the STTD encoded pilot. To improve the tracking ability of the channel estimation against fast fading, decision feedback is also used in addition to pilot. For noise reduction and preventing the error propagation, windowing of the estimated channel impulse response in the time-delay domain is applied. The average bit error rate (BER) performance of OFDM with STTD is evaluated by computer simulation. It is found that the use of PA-DFCE can achieve a degradation in the required Eb/N0 from ideal CE of as small as 0.6 dB for an average BER = 10-3 and requires about 2.4 dB less Eb/N0 compared to differential STTD that requires no CE.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalIEICE Transactions on Communications
Issue number2
Publication statusPublished - 2005
Externally publishedYes


  • Channel estimation
  • Decision feedback
  • OFDM
  • Pilot
  • STTD

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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