Patent ID: 8743796

Claim:
A transmission apparatus comprising: a first generator to assign a first sequence including first symbols into first sub-carriers in a frequency domain; a second generator to derive second symbols from each of the first symbols, and to assign the second sequence including the second symbols into second sub-carriers in the frequency domain; and a transmitter to transmit the first sequence assigned into the first sub-carriers and the second sequence assigned into the second sub-carriers, wherein a transfer resource to transmit the first sequence is distinguished from a transfer resource to transmit the second sequence, wherein the second generator derives each of the second symbols by maintaining or reversing a sign of a real number or an imaginary number of the each of the first symbols included in the first sequence, wherein the second generator derives each of the second symbols by applying at least one of complex-conjugation, minus 1, and plus 1 to each of the first symbols.