In one aspect, a transmitter, for a first time interval, allocates first and second portions of a frequency band to first and second multicarrier modulation schemes with first and second subcarrier spacings that differ from one another. The data is transmitted to wireless devices in the first time interval using the first and second multicarrier modulation schemes in the first and second portions of the frequency band. For a second time interval, third and fourth non-overlapping portions of a frequency band are allocated to third and fourth multicarrier modulation schemes that have third and fourth subcarrier spacings that differ from one another. The third and fourth portions and/or schemes differ from the first and second portions and/or schemes. The data is transmitted in the second time interval using the third and fourth multicarrier modulation schemes in the third and fourth portions of the frequency band.

A method for operating a device includes determining adaptation criteria for a waveform to be transmitted by a transmitting device over a communications channel towards a receiving device, and adjusting a generalized multi-carrier multiplexing parameter (GMMP) of the waveform in accordance with the adaptation criteria. The method also includes transmitting an indicator of the adjusted GMMP to at least one of the transmitting device and the receiving device.

Provided are a communication method and system that combine IoT technologies with 5G communication systems supporting a higher data rate after 4G systems. The present disclosure may be applied to intelligent services, such as smart homes, smart buildings, smart cities, smart or connected cars, healthcare, digital education, retail businesses, and security and safety related services on the basis of 5G communication technologies and IoT related technologies. The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting uplink and downlink signals in a system supporting IoT terminals that perform transmission and reception using only one subcarrier. Specifically, there is provided a method including: allocating a resource for an IoT terminal; and exchanging a signal through a specific subcarrier of the resource between the IoT terminal and the base station supporting the IoT terminal.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). A method for operating a base station in a wireless communication system according to an embodiment includes determining interference between symbols of a signal received from at least one terminal, determining a time offset of the received signal based on the determined interference, and determining a detection interval of the signal received from the at least one terminal based on the time offset.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to the transmission and the reception of filter bank multi-carrier (FBMC) symbols in a wireless communication system, a method for operating a transmitting end comprises the step of: generating a first symbol in which sample values of a front end are shifted to a rear end; generating a second symbol in which sample values of a rear end are shifted to a front end; and transmitting a plurality of symbols comprising the first symbol and the second symbol on a time axis in an overlapping manner.

An STBC/SFBC-based signal transmission method and apparatus is provided for use in a multi-carrier system. A method for a transmitter to transmit a signal to a receiver in a diversity transmission mode according to the present invention includes transmitting a filter index indicating a filter allocated to the receiver and transmitting Space Time Block Code (STBC) symbols to the receiver at symbol positions selected based on the filter index.

Provided is a method for transmitting a transmission symbol in a transmitting device supporting a filter bank multi carrier (FBMC) scheme. The method includes generating a training symbol by including a training signal in at least one of an odd symbol and an even symbol constituting the training symbol; generating the transmission symbol by delay-overlapping the training symbol and at least one data symbol; and transmitting the transmission symbol.

The present invention relates to a 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE). The present invention relates to the transmission of a filter bank multi-carrier (FBMC) symbol in a wireless communication system, and a method for operating a transmission terminal comprises the steps of: transmitting a first FBMC symbol generated by applying filters to subcarriers according to a first pattern; and transmitting a second FBMC symbol generated by applying the filters to the subcarriers according to a second pattern. In addition, the present invention also comprises examples different from the above mentioned example.

A transmission method and an FBMC transmitter to transmit at least a first and a second block of symbols (X.sub.0, X.sub.1), each symbols block including a temporal sequence of L vectors with predetermined size N. It uses a first and a second FBMC modulation channel, each FBMC modulation channel being associated with an antenna. During a first use of the channel, the vectors of the first block and the vectors of the second block are input to the first and to the second FBMC modulation channels respectively, in the order of the temporal sequence. During a second use of the channel, the vectors of the first and second blocks are multiplied by a factor j.sup.L 1 respectively and (j.sup.L 1) input to the second and to the first FBMC modulation channels respectively, in the inverse order of the temporal sequence.

Channel estimation with reduced overhead in a filter bank multi-carrier (FBMC) system is enabled by use of frequency-time blocks each comprising a pilot field with two pilot symbols and data symbols outside the pilot field. In embodiments, nearest neighbors of the pilot field are populated with data symbols which fulfill one or more symmetry relations enabling approximate interference cancellation. In a first embodiment, the pilot field consists of two frequency-consecutive and time-coinciding positions; the pilot field may be time-initial in a transmission or may be located in the interior of the transmission. In a second embodiment, a block comprises two frequency-coinciding and time-consecutive pilot symbols; the pilot field may be frequency-initial in a transmission or may be located in the interior of the transmission.