Iterative normalization technique for reference sequence generation for zero-tail discrete fourier transform spread orthogonal frequency division multiplexing

An apparatus, comprising:

• at least one processor;
• and
• at least one memory comprising computer program code,
• the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to
• (a) add a zero vector to an input sequence,
• (b) perform an iterative manipulation of the input sequence until a final sequence with zero-tail and flat frequency response is obtained, and
• (c) generate a transmit signal by having the final sequence undergo discrete fourier transform (DFT), subcarrier mapping, and inverse fast fourier transform (IFFT).

A computer program, embodied on a non-transitory computer readable medium, the computer program configured to control a processor to perform a process, comprising:

• (a) adding a zero vector to an input sequence;
• (b) performing an iterative manipulation of the input sequence until a final sequence with zero-tail and flat frequency response is obtained;
• and
• (c) generating a transmit signal by having the final sequence undergo discrete fourier transform (DFT), subcarrier mapping, and inverse fast fourier transform (IFFT).