2-step QRM-MLBD for broadband single-carrier transmission

Katsuhiro Temma, Tetsuya Yamamoto, Kyesan Lee, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Maximum likelihood block signal detection employing QR decomposition and M-algorithm (QRM-MLBD) can significantly improve the bit error rate (BER) performance of single-carrier (SC) transmission while significantly reducing the computational complexity compared to maximum likelihood detection (MLD). However, its computational complexity is still high. In this paper, we propose the computationally efficient 2-step QRM-MLBD. Compared to conventional QRM-MLBD, the number of symbol candidates can be reduced by using preliminary decision made by minimum mean square error based frequency-domain equalization (MMSE-FDE). The BER performance achievable by 2-step QRM-MLBD is evaluated by computer simulation. It is shown that it can significantly reduce the computational complexity while achieving almost the same BER performance as the conventional QRM-MLBD.

Original languageEnglish
Pages (from-to)1366-1374
Number of pages9
JournalIEICE Transactions on Communications
Issue number4
Publication statusPublished - 2012 Apr


  • M-algorithm
  • QR decomposition
  • Single-carrier


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