Transmission device, communication device, transmission signal generation method, reception device, and demodulation method

A transmission signal generation method to be executed by a transmission device in a communication system that includes the transmission device and a reception device and performs single-carrier block transmission, the transmission signal generation method comprising:

• a data symbol generating step of generating data symbols;
• a static sequence generating step of generating a sequence of static symbols;
• a block signal generating step of generating a block signal based on the data symbols and the sequence of static symbols, where static symbols are arranged in a leading part and a trailing part of the block signal, while data symbols are arranged in a remaining central part of the block signal;
• a time-to-frequency transform step of transforming the block signal to a frequency-domain signal;
• a band reducing step of removing a predetermined number of signals in parts for both ends from the block signal after having been transformed to a frequency-domain signal;
• an interpolating step of performing interpolation processing on the block signal after a predetermined number of signals in parts for both ends have been removed in the bandwidth reducing step;
• and
• a frequency-to-time transform step of transforming the block signal after having undergone the interpolation processing to a time-domain signal.