Transmitting method, receiving method, transmitter, and receiver

A transmitter comprising:

• transmission means which initially divides a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction, secondly forms a plurality of subcarriers within each one of said plurality of blocks, then thirdly forms one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and
• means for transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said transmission means includes means for allocating said predetermined number of said plurality of blocks randomly to said one communication channel.

A transmitter comprising:

• transmission means which initially divides a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction, secondly forms a plurality of subcarriers within each one of said plurality of blocks, then thirdly forms one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and
• means for transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said transmission means includes means for superposing said information of said transmission object on said plurality of subcarriers of said desired communication channel, by performing a Fourier transformation on said information of said transmission object.

A receiver comprising reception means in which, when a time slot formed by time-division multiplexing is divided into a plurality of blocks in at least a frequency direction, then a plurality of subcarriers are formed within each one of said plurality of blocks, then one communication channel is formed with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and lastly information of a transmission object transmitted with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels is received,

• said reception means obtains a reception signal by receiving said time slot which includes said desired communication channel used when said information of said transmission object is transmitted, then fetches all information of said time slot by performing a Fourier transformation on said reception signal, and fetches said information of said transmission object transmitted using said desired communication channel used in communication with a local station from said all information.