Alamouti mapping for use in real field orthogonal fbmc modulation systems

A transmitting device for transmitting data in a real field orthogonal FBMC modulation system, the device comprising:

• a processing unit adapted to form a coding group of N modulation symbols, where N=m×n, wherein the processing unit is adapted to generate a first mapping of the coding group of N modulation symbols in a time-frequency domain;
• and to generate an element-wise Alamouti mapping of the coding group of N modulation symbols;
• and
• a transmitter unit adapted to transmit the N modulation symbols of the first mapping via a first antenna, and to transmit the N modulation symbols of the element-wise Alamouti mapping via another, second antenna;
• wherein the Alamouti mapping of the coding group of N modulation symbols is representable by a second matrix, wherein the second matrix of the element-wise Alamouti mapping has a first block and a second block, each of the two blocks having N/2 modulation symbols and comprises a respective one of the two modulation symbols of each Alamouti pair;
• and
• wherein a pattern of the signs of the modulation symbols within the second block of the second matrix is opposite to the pattern of the signs of the modulation symbols within the first block of the second matrix.

A non-transitory computer readable medium storing instructions that, when executed by a processor of a device, cause the device to transmit data in a real field orthogonal FBMC modulation system, by:

• forming a coding group of N modulation symbols, where N=m×n;
• generating a first mapping of the coding group of N modulation symbols in a time-frequency domain;
• generating an element-wise Alamouti mapping of the coding group of N modulation symbols;
• wherein the Alamouti mapping of the coding group of N modulation symbols is representable by a second matrix, wherein the second matrix of the element-wise Alamouti mapping has a first block and a second block, each of the two blocks having N/2 modulation symbols and comprises a respective one of the two modulation symbols of each Alamouti pair;
• wherein a pattern of the signs of the modulation symbols within the second block of the second matrix is opposite to the pattern of the signs of the modulation symbols within the first block of the second matrix;
• and
• transmitting the N modulation symbols of the first mapping via a first antenna, and transmitting the N modulation symbols of the element-wise Alamouti mapping via another, second antenna.