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Method of PAPR reduction for OFDM system using additive mapping sequences and apparatus for the same
Method of PAPR reduction for OFDM system using additive mapping sequences and apparatus for the same
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机译:使用加性映射序列的OFDM系统的PAPR降低方法及其装置
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摘要
PURPOSE: A method and apparatus for reducing a peak to average power ratio in an orthogonal frequency division multiplexing system using additional mapping sequences are provided to generate an alternative signal sequence by performs IFFT(inverse fast Fourier transform) of sub blocks and an additional mapping symbol sub block and then linearly coupling the sub blocks and the additional mapping symbol sub block in a time domain. CONSTITUTION: A sub block partition part(410) partitions an OFDM symbol sequence into two or more sub blocks. An additional mapping symbol sub block generating part(420) generates additional mapping symbol sub blocks which corresponds to each sub block. An IFFTpart(430) performs IFFT of sub blocks and the additional mapping symbol sub blocks. An alternative signal sequence generation part(440) generates alternative signal sequences using signal subsequences and additional mapping signal subsequences. A minimum PAPR(peak to average power ratio) selecting part(450) selects the alternative signal sequence corresponding to minimum PAPR.
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