Therefore, OFDM data transmission represents one of the most important techniques in advanced wireless communications. The limited availability of spectrum resources places constraints on the ...

Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which transmits information bits through ordinary constellation symbols and indices of active subcarriers, is a promising ...

Learn how OFDM balances bandwidth and power efficiency, achieves synchronization and channel estimation, exploits MIMO and beamforming, and enhances security and privacy.

In the coherent optical OFDM with index modulation system (CO-OFDM-IM), the information is conveyed not only through activated subcarriers but also by indices of the active subcarrier that are ...

From these preliminary results, several key properties of relay-assisted OFDM-IM can be observed and it is thus summarized that relay-assisted OFDM-IM would be considered as an intriguing solution for ...