EM-based poor slot update method for MIMO IDD receiver in fast time-varying channels

Minsung Kim, Jehoon Cho, Taewon Oh

Research output: Contribution to journalArticlepeer-review


In this study, the authors propose an expectation-maximisation (EM)-based poor slot update method for multiple-input multiple-output (MIMO) iterative detection and decoding (IDD) receivers to increase their channel tracking capability in fast timevarying channels. The poor slots that trigger error propagation in a frame are selected, the channel state information is updated, and the updated recursive least squares channel tracking algorithm is executed. The accurate channel tracking capability of this new channel updating technique contributes to a 3 dB improvement in the bit error rate performance of an IDD receiver in a fast mobile environment ( > 180 km/h). The authors also demonstrate that an ~ 20 - 25% complexity reduction can be achieved under various conditions.

Original languageEnglish
Pages (from-to)932-940
Number of pages9
JournalIET Communications
Issue number8
Publication statusPublished - 2018 May 15

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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