An application of interleaved frequency-division multiple-access (IFDMA) for mobile communications has become an active field of research since 1998. The special interest has been given to the uplink of mobile communication since low peak-to-average power ratio makes IFDMA attractive for hand-held mobile devices allowing an application of cheap amplifiers.
The IFDMA signal can be generated simply by compression and repetition of the transmit data sequence, without usage of fast Fourier transformation. Due to the periodic nulls in transmit spectrum, other users may utilize the same frequency band allowing multiple access.
This work contributes to the state of the art in the field of IFDMA in the following areas: data detection, PAPR reduction of multi-carrier systems, an estimation of frequency offsets in multicarrier uplink, where many users are simultaneously active.