发明名称 |
Multi-band predistorter using power series representation |
摘要 |
A transmission signal containing signals of a plurality of frequency bands is divided and fed to a linear signal transfer path including a delay circuit and a plurality of distortion generation paths for the plurality of frequency bands. In each distortion generation path, the signal of the corresponding frequency band is extracted by a band signal extractor from the signal fed to the path, an odd-order distortion of the extracted signal is generated by an odd-order distortion generator, and the phase and amplitude of the odd-order distortion are adjusted by a vector adjuster to provide the output signal of the distortion generation path. The output signals from such plurality of distortion generation paths are combined by a combiner with the output from the linear signal transfer path to provide the combined output as the output from a multi-band predistorter using power series representation. <IMAGE>
|
申请公布号 |
EP1562285(A1) |
申请公布日期 |
2005.08.10 |
申请号 |
EP20050002147 |
申请日期 |
2005.02.02 |
申请人 |
NTT DOCOMO, INC. |
发明人 |
SUZUKI, YASUNORI;NARAHASHI, SHOICHI;MIZUTA, SHINJI;YAMAO, YASUSHI |
分类号 |
H03F1/32;H04B1/62;(IPC1-7):H03F1/32 |
主分类号 |
H03F1/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|