Subcarrier-Interactive Dual-Mode OFDM

YILDIRIM M.

IEEE Communications Letters, cilt.27, sa.5, ss.1472-1476, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 5
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1109/lcomm.2023.3248523
  • Dergi Adı: IEEE Communications Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1472-1476
  • Anahtar Kelimeler: dual-mode, index modulation (IM), log-likelihood ratio (LLR), maximum-likelihood (ML), OFDM
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

In this letter, a novel dual-mode index modulation aided orthogonal frequency division multiplexing (DM-OFDM) scheme called subcarrier-interactive (SI-) DM-OFDM is proposed. In the SIDM-OFDM, each subcarrier pair conveys the same QAM modulated symbols to achieve a diversity gain. At the receiver, a low complexity (LC) signal detection algorithm is proposed, i.e., SIDM-OFDM-LC, where each subcarrier interacts with other subcarriers in the same subblock as complementary and non-complementary states to improve BER performance. Moreover, Euclidean distance (ED) of the received signal and channel-noise matrix (CNM) based signal detection algorithms are employed for demodulation, namely SIDM-OFDM-ED and SIDM-OFDM-CNM, respectively. Simulation results confirm that the SIDM-OFDM with the proposed three signal detection algorithms achieves a significantly better BER performance than the existing DM-OFDM scheme at the same spectral efficiency. Also, it is revealed that the SIDM-OFDM-LC reduces the signal detection cost compared to the other two proposed detectors.