发明名称 |
Method and apparatus for reducing peak power in partial transmit sequence OFDM |
摘要 |
There is provided a PTS (Partial Transmit Sequence) OFDM (Orthogonal Frequency Division Multiplexing) scheme for reduction of a PAPR (Peak-to-Average Power Ratio). In an OFDM transmitting apparatus for peak power reduction according to the present invention, an rotational sub-block partitioner partitions an input data block of length N into M, the number of sub-block, and distributes the partitioned data of each data block in M sub-blocks one by one rotationally. M IFFTs (Inverse Fast Fourier Transformers) perform N/M-point IFFT on N/M data assigned to each of the M sub-blocks and M coefficient multipliers multiply the N/M data output from each IFFT by a predetermined coefficient to give orthogonality to the frequency components of the N/M output data. A phase factor optimizer optimizes M phase factors to minimize a PAPR using the N/M output values of each coefficient multiplier. M multipliers multiply the optimized M phase factors by the outputs of the coefficient multipliers. A transmitter sums the outputs of the M multipliers on a symbol-to-symbol basis in the same positions and transmits the sum.
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申请公布号 |
US7002904(B2) |
申请公布日期 |
2006.02.21 |
申请号 |
US20010027990 |
申请日期 |
2001.12.20 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
JUNG DAE-KWON |
分类号 |
H04J11/00;H04L27/26;H04M3/42 |
主分类号 |
H04J11/00 |
代理机构 |
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主权项 |
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地址 |
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