Abstract: Methods and techniques are described for increasing data rate at a high error performance in wireless transmission. Each complex symbol of a sequence of complex symbols is mapped onto a respective subcarrier in a frequency division based system, which may be orthogonal or non-orthogonal frequency division multiplex. The sequence is a sequence concatenated from N sequences of complex symbols, wherein N is an integer greater than one, and each of the N sequences is a mapping of the data block onto the complex symbols of the respective sequence. The real parts of the sequence have been circularly shifted by a first number, cRe, of elements, and/or the imaginary parts of the sequence have been circularly shifted by a second number, cIm, of elements, wherein cRe and cIm are different integers greater than or equal to zero.

Abstract: Methods and techniques are described for increasing data rate at a high error performance in wireless transmission. A plurality of groups of p bits, wherein p is an integer greater than 1, is obtained. A transmission signal is generated, which includes, for a group of p bits dividing the group of p bits into a first subgroup of p1 bits and a second subgroup of p2 bits, wherein p1 and p2 are integers greater than zero. Based on the p1 bits, a sequence of modulation schemes is selected from a plurality of predetermined sequences of modulation schemes. The predetermined sequences are mutually different, and each of the predetermined sequences has length R, wherein R is an integer greater than 1. The p2 bits onto R subcarriers are mapped respectively by means of the R modulation schemes of the selected sequence. Finally, the generated transmission signal is transmitted.

Abstract: A generalized frequency division multiplexing method with multiple-input multiple-output and flexible index modulation, which enables to have the energy efficiency provided by space and frequency index modulation systems with generalized frequency division multiplexing (GFDM) without complicating the transmitter and receiver structure and provide for the efficient use of frequency resources, increase in spectral efficiency, minimum complexity and increase in energy efficiency.

Abstract: A generalized frequency division multiplexing method with multiple-input multiple-output and flexible index modulation, which enables to have the energy efficiency provided by space and frequency index modulation systems with generalized frequency division multiplexing (GFDM) without complicating the transmitter and receiver structure and provide for the efficient use of frequency resources, increase in spectral efficiency, minimum complexity and increase in energy efficiency.

Abstract: A communication system for the next generation wireless communications technology standards. The communication system architecture is created by the combination of the index modulation technique and the multiple input multiple output orthogonal frequency division multiplexing which eliminates the need to utilize complex equalizers by parsing high speed data strings and transmitting them over multiple orthogonal subcarriers, and allows the bits to be transmitted via active subcarrier indices. The OFDM-IM and multiple input multiple output communication techniques are used in tandem. The communication system can be used in future generation mobile communication systems and standards (5G and beyond), Local Area Network system and standards, terrestrial digital TV system and standards, multi-carrier communication systems and broadband digital communication systems.

Abstract: A communication system for the next generation wireless communications technology standards. The communication system architecture is created by the combination of the index modulation technique and the multiple input, multiple output orthogonal frequency division multiplexing which eliminates the need to utilize complex equalizers by parsing high speed data strings and transmitting them over multiple orthogonal subcarriers, and allows the bits to be transmitted via active subcarrier indices. The OFDM-IM and multiple input multiple output communication techniques are used in tandem. The communication system can be used in future generation mobile communication systems and standards (5G and beyond), Local Area Network system and standards, terrestrial digital TV system and standards, multi-carrier communication systems and broadband digital communication systems.