Equiprobable Subcarrier Activation Method for OFDM With Index Modulation


Wen M., ZHANG Y., LI J., Basar E. , CHEN F.

IEEE COMMUNICATIONS LETTERS, cilt.20, ss.2386-2389, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 20 Konu: 12
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1109/lcomm.2016.2608350
  • Dergi Adı: IEEE COMMUNICATIONS LETTERS
  • Sayfa Sayıları: ss.2386-2389

Özet

Orthogonal frequency division multiplexing with index modulation (OFDM-IM) conveys additional information bits via the indices of active subcarriers. Consequently, the determination of the active subcarriers according to the incoming bits arises as a challenging problem. The existing solution resorts to the lexicographic ordering, which leads to a low implementation complexity but an unequal subcarrier activation probability. This letter proposes a distinct solution that allows the equiprobable activation of all OFDM-IM subcarriers with comparable implementation complexity. The signal-to-noise ratio gain achieved by the proposed solution is also analyzed. Computer simulations reveal the advantages of the proposed solution.