| 发明名称 |
DIRECT DIGITAL SYNTHESIS IN A QAM DEMODULATOR |
| 摘要 |
A QAM demodulator is disclosed, which comprises two direct digital synthesizer circuits, for the provision of carrier synchronisation. The first DDS is located upstream of the receivers root-raised-cosine filter, and ensures frequency synchronisation, whilst the second DDS is downstream of the filter and ensures phase synchronisation.
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| 申请公布号 |
WO02103976(A8) |
申请公布日期 |
2003.02.20 |
| 申请号 |
WO2001US40095 |
申请日期 |
2001.02.12 |
| 申请人 |
ATMEL CORPORATION |
发明人 |
MAALEJ, KHALED;HAMMAN, EMMANUEL;DEMOL, AMAURY;LEVY, YANNICK |
| 分类号 |
H04L1/00;H04L7/02;H04L27/00;H04L27/38;(IPC1-7):H04L27/38 |
主分类号 |
H04L1/00 |
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