Performance Evaluation of Index Modulation with Single Subcarrier Activation


Zhang H., Sui Z., Başar E., Yang L., Hanzo L.

IEEE Wireless Communications and Networking Conference (WCNC), Nanjing, China, 29 March - 01 April 2021 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/wcnc49053.2021.9417409
  • City: Nanjing
  • Country: China
  • Keywords: Index modulation, OFDM, PAPR, compressed sensing, approximate message passing, OFDM
  • Istanbul Technical University Affiliated: Yes

Abstract

Index modulation (IM) has been recognized as a compelling candidate for the next generation wireless networks. This paper considers index modulation-orthogonal frequency division multiplexing (IM-OFDM) with single subcarrier activation, where a single subcarrier is activated for transmitting an amplitude-phase modulated (APM) symbol in each IM group. Furthermore, a reduced-complexity approximate message passing aided symbol detector (AMPD) is proposed for reducing the detection complexity at the receiver side. The system performance of IM-OFDM with single subcarrier activation is investigated in terms of spectral efficiency (SE), peak-to-average power ratio (PAPR), bit error ratio (BER), as well as detection complexity. Our studies show that IM-OFDM with single subcarrier activation is capable of attaining low PAPR. Moreover, IM-OFDM with single subcarrier activation outperforms the classic OFDM using APM for a SE of 1 bit/s/Hz, when high power amplifier (HPA) is employed. Furthermore, our investigation shows that low detection complexity can be achieved by the proposed AMPD for IM-OFDM with single subcarrier activation at the cost of a certain BER performance loss.