A low cost OFDM based modulation schemes for data communication in the passband frequency

This contribution presents low computational complexity versions of orthogonal frequency division multiplexing (OFDM) modulation scheme for the implementation of clustered-OFDM systems for data transmission in the passband frequency. Among the proposed schemes, which are named Hermitian symmetric OFDM (HS-OFDM) I and HS-OFDM II, the HS-OFDM II can offer computational complexity reduction in comparison with the single side-band OFDM (SSB-OFDM), OFDM, and HS-OFDM systems when the length of the OFDM symbol increases. Results show that all simulated schemes can provide the same BER performance in PLC channel. Additionally, HS-OFDM I has a lower complexity than traditional HS-OFDM, and HS-OFDM II further reduces the complexity and achieves the lowest complexity implementation among the five schemes.