Patent ID: 7684463

Claim:
A frequency-division multiplexing transmission apparatus that transmits data in a frequency spectrum specific to both symbol and mobile station, and comprising: an encoder for encoding transmission data; a data-modulation unit for modulating output data from said encoder; a time-domain compression and repetition unit for compressing the time domains of each symbol of the transmission-symbol sequence that is output from said modulation unit, and repeating the symbols a specified number of times; a symbol-rearrangement unit for rearranging each of the symbols of the obtained repetitive-symbol sequence so that they have the same arrangement as said transmission-symbol sequence; a first phase-generation unit for generating each phase that respectively changes at a speed specific to each symbol of the transmission symbol sequence; a first phase-rotation unit for performing phase rotation specific to said symbols for each symbol of the rearranged repetitive-symbol sequence; a second phase-generation unit for generating phase that changes at a speed specific to a mobile station; a second phase-rotation unit for performing phase rotation specific to said mobile station for the symbol sequence that is output from said first phase-rotation unit; and a transmission unit for transmitting the output from said second phase-rotation unit.