In this paper, we propose a novel scheme termed layered orthogonal frequency division
multiplexing with index modulation (L-OFDM-IM) to increase the spectral efficiency (SE) of …

Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which
transmits information bits via-ary constellation symbols and indices of the active subcarriers …

LoRa is a modulation technology for low power wide area networks (LPWAN) with
enormous potential in 5G era. However, the performance of LoRa system deteriorates …

Orthogonal frequency division multiplexing (OFDM) with index modulation (OFDM-IM)
appears as a promising multi-carrier waveform candidate for beyond 5G due to its attractive …

As an attempt to tackle the low-data-rate issue of the conventional LoRa systems, we
propose two novel frequency-bin-index (FBI) LoRa schemes. In scheme I, the indices of …

We propose a new spread orthogonal frequency division multiplexing with index modulation
(S-OFDM-IM), which employs precoding matrices such as Walsh-Hadamard (WH) and …

There is a recent surge of research interest in the study of performance-enhancing
techniques for orthogonal frequency division multiplexing (OFDM)-based relay systems …

As a novel wireless transmission scheme, multi-mode orthogonal frequency division
multiplexing with index modulation (MM-OFDM-IM) is proposed recently, where multiple …

As a new multicarrier modulation technology, orthogonal frequency division multiplexing
index modulation has more advantages than OFDM. Specifically, OFDM-IM demonstrates …

In this paper, we propose a novel codebook design scheme for orthogonal frequency-
division multiplexing with index modulation (OFDM-IM) to improve system performance. The …