APPARATUS AND METHOD FOR CREATING OTHORGONAL FREQUENCY DIVISION MULTIPLEXING SIGNAL
摘要
<p>An apparatus and a method for creating an orthogonal frequency division multiplexing(OFDM) signal are provided to decrease PAPR(Peak-to-Average Power Ratio) without attenuating bandwidth efficiency according to the transmission of additional information in an OFDM communication system. A symbol padding part(305) outputs an extended symbol stream by adding a part of a plurality of digital modulation symbols to the plurality of digital modulation symbols. A symbol search part(307) outputs plural weights corresponding to each of the plurality of digital modulation symbols by using FFT(Fast Fourier Transform) and IFFT(Inverse Fast Fourier Transform) by receiving the extended symbol stream. A symbol weight part(309) outputs a plurality of weight symbols by applying plural weights searched by the symbol search part to the plurality of digital modulation symbols by receiving the plurality of digital modulation symbols. A power compensation part(311) outputs a power compensation signal by compensating the variation of power according to the plural weights by receiving the plurality of weight symbols.</p>
申请公布号
KR20070117449(A)
申请公布日期
2007.12.12
申请号
KR20070042509
申请日期
2007.05.02
申请人
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
发明人
KIM, NAM IL;JWA, HYE KYUNG;KIM, YOUNG HOON;BANG, SEUNG CHAN