Transmitter, receiver and methods

A transmitter circuitry comprising

• frame builder circuitry configured to receive data to be transmitted to a communications devices from an infrastructure equipment of a wireless communications network, and to form the data into one or more data-blocks for transmission via a wireless access interface having a time divided structure comprising repeating time-units of resource elements,
• modulator circuitry configured to modulate a plurality of sub-carriers of one or more Orthogonal Frequency Division Multiplexed, OFDM, symbols with the data of each data-block in accordance with a modulation scheme, and
• mapping circuitry configured to map the sub-carriers of each of the one or more OFDM symbols onto the resource elements of one or more time-units of the wireless access interface in the frequency domain for transmission, and
• radio frequency transmission circuitry configured to transmit each of the one or more OFDM symbols in the one or more time-units, wherein the modulator circuitry includes
• modulation symbol generator circuitry configured to receive the data and to generate modulation symbols representing the data each modulation symbol for modulating a corresponding sub-carrier of the OFDM symbols in accordance with a modulation scheme,
• segmentation circuitry configured to receive the modulation symbols representing the data and to divide the modulation symbols into segments of modulation symbols for transmission, each segment of the modulation symbols for transmission via an integer number of the one or more OFDM symbols or part thereof,
• modulation rotation circuitry configured to receive the modulation symbols of one segment and to rotate each modulation symbol by an angle dependent on the choice of modulation scheme,
• I/Q interleaver circuitry, which is configured to receive each of the segments of rotated modulation symbols and for each segment to separate real and imaginary components of the rotated modulation symbols of the segment and to interleave the real components of the rotated modulation symbols of the segment differently to the imaginary components of the rotated modulation symbols of the segment, and
• I/Q combiner circuitry configured to re-combine the real and imaginary components of the modulation symbols of each segment and to form the modulation symbol for modulating each of the plurality of sub-carriers of each of the integer number of OFDM symbols or part thereof for the segment to be transmitted.

A communications device for transmitting to an infrastructure equipment of a wireless communications network, the communications device comprising

• transmitter circuitry configured to transmit signals to the infrastructure equipment via a wireless access interface formed by the infrastructure equipment, and
• controller circuitry configured to control the transmitter circuitry to transmit data represented as the signals via the wireless access interface having a time divided structure of repeating time units, each of the time units comprising a predetermined number of resource elements disposed in time and frequency, the transmitter circuitry comprising
• frame builder circuitry configured to receive the data to be transmitted to the infrastructure equipment, and to form the data into one or more data-blocks for transmission via one or more of the time-units of the wireless access interface,
• modulator circuitry configured to modulate a plurality of sub-carriers of one or more Orthogonal Frequency Division Multiplexed, OFDM, symbols with the data of each data-block in accordance with a modulation scheme, and
• mapping circuitry configured to map the sub-carriers of each of the one or more OFDM symbols onto the resource elements of the one or more time-units of the wireless access interface in the frequency domain for transmission, and
• radio frequency transmission circuitry configured to transmit each of the one or more OFDM symbols in the one or more time-units, wherein the modulator circuitry includes
• modulation symbol generator circuitry configured to receive the data and to generate modulation symbols representing the data each modulation symbol for modulating a corresponding sub-carrier of the OFDM symbols in accordance with a modulation scheme,
• segmentation circuitry configured to receive the modulation symbols representing the data and to divide the modulation symbols into segments of modulation symbols for transmission, each segment of the modulation symbols being arranged for transmission via an integer number of the one or more OFDM symbols or part thereof,
• modulation rotation circuitry configured to receive the modulation symbols of one segment and to rotate each modulation symbol by an angle dependent on the choice of modulation scheme,
• I/Q interleaver circuitry, which is configured to receive each of the segments of rotated modulation symbols and for each segment to separate real and imaginary components of the rotated modulation symbols of the segment and to interleave the real components of the rotated modulation symbols of the segment differently to the imaginary components of the rotated modulation symbols of the segment, and
• I/Q combiner circuitry configured to re-combine the real and imaginary components of the modulation symbols of each segment and to form the modulation symbol for modulating each of the plurality of sub-carriers of each of the integer number of OFDM symbols for the segment to be transmitted.