Frequency-division multiplexing transceiver apparatus and method

A frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to a mobile station, comprising:

• a first phase-rotation unit that performs phase rotation that increases in increments of π/4 or decreases in decrements of −π/4 for each symbol of a transmission-symbol sequence;
• a symbol-repetition and rearrangement unit that compresses the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeats those symbols a specified number of times (L times), and rearranges the symbols of the obtained repetitive-symbol sequence so that the obtained respective-symbol sequence has the same arrangement as the transmission-symbol sequence;
• a second phase-rotation unit that performs phase rotation that changes at a speed specific to the mobile station for each symbol of the rearranged repetitive-symbol sequence;
• and
• a transmission unit that transmits said phase-rotated symbols;
• wherein
• said second phase-rotation unit changes the amount of rotation performed on each symbol of said repetitive-symbol sequence in increments of k·2π/L (where k is an integer specific to the mobile station) at each period of said repetitive-symbol sequence.

A frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to a mobile station, comprising:

• a first phase-rotation unit that performs π/4 or −π/4 phase rotation for the even-numbered or odd-numbered symbols of a transmission-symbol sequence;
• a symbol-repetition and rearrangement unit that compresses the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeats those symbols a specified number of times (L times), and rearranges the symbols of the obtained repetitive-symbol sequence so that the obtained respective-symbol sequence has the same arrangement as the transmission-symbol sequence;
• a second phase-rotation unit that performs phase rotation that changes at a speed specific to the mobile station for each symbol of the repetitive-symbol sequence;
• and
• a transmission unit that transmits said phase-rotated symbols.

A frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to a mobile station, comprising:

• a first phase-rotation unit that performs π/4 or −π/4 phase rotation for the even-numbered or odd-numbered symbols of a transmission-symbol sequence;
• a symbol-repetition and rearrangement unit that compresses the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeats those symbols a specified number of times (L times), and rearranges the symbols of the obtained repetitive-symbol sequence so that the obtained respective-symbol sequence has the same arrangement as the transmission-symbol sequence;
• a second phase-rotation unit that performs phase rotation that changes at a speed specific to the mobile station for each symbol of the repetitive-symbol sequence;
• and
• a transmission unit that transmits said phase-rotated symbols;
• wherein
• said second phase-rotation unit changes the amount of rotation performed on each symbol of said repetitive-symbol sequence in increments of k·2π/L (where k is an integer specific to the mobile station) at each period of said repetitive-symbol sequence.

A frequency-division multiplexing transmission method for transmitting data in a frequency spectrum specific to a mobile station, comprising:

• a first step of performing phase rotation that increases in increments of π/4 or decreases in decrements of −π/4 for each symbol of a transmission-symbol sequence;
• a second step of compressing the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeating those symbols a specified number of times (L times), and rearranging the symbols of the obtained repetitive-symbol sequence so that the obtained respective-symbol sequence has the same arrangement as the transmission-symbol sequence;
• a third step of performing phase rotation that changes at a speed specific to the mobile station for each symbol of the repetitive-symbol sequence;
• and
• a fourth step of transmitting said phase-rotated symbols;
• wherein
• in said third step, the amount of rotation performed on each symbol of said repetitive-symbol sequence changes in increments of k·2π/L (where k is an integer specific to the mobile station) at each period of said repetitive-symbol sequence.

A frequency-division multiplexing transmission method for transmitting data in a frequency spectrum specific to a mobile station, comprising:

• a first step of performing π/4 or −π/4 phase rotation for the even-numbered or odd-numbered symbols of a transmission-symbol sequence;
• a second step of compressing the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeating those symbols a specified number of times (L times), and rearranging the symbols of the obtained repetitive-symbol sequence so that the obtained respective-symbol sequence has the same arrangement as the transmission-symbol sequence;
• a third step of performing phase rotation that changes at a speed specific to the mobile station for each symbol of the repetitive-symbol sequence;
• and
• a fourth step of transmitting said phase-rotated symbols;
• wherein
• in said third step, the amount of rotation performed on each symbol of said repetitive-symbol sequence changes in increments of k·2π/L (where k is an integer specific to the mobile station) at each period of said repetitive-symbol sequence.