发明授权
- 专利标题: Methods and apparatus for reducing high-frequency events in polar domain signals
- 专利标题(中): 减少极地信号中高频事件的方法和装置
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申请号: US12414016申请日: 2009-03-30
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公开(公告)号: US08300729B2公开(公告)日: 2012-10-30
- 发明人: Hua Wang , Paul Cheng-Po Liang
- 申请人: Hua Wang , Paul Cheng-Po Liang
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 主分类号: H03C3/00
- IPC分类号: H03C3/00 ; H04L27/12
摘要:
Methods and apparatus for reducing high-frequency events in polar domain signals. An exemplary method includes first generating an unmodified rectangular-coordinate signal having in-phase (I) and quadrature phase (Q) components that are modulated according to a predetermined modulation scheme. Next a first sample of the unmodified rectangular-coordinate signal is modified based on how close the first sample is to the origin in the complex signal plane and how fast a signal trajectory between the first sample and a subsequent sample changes. Finally, the modified rectangular-coordinate signal is converted to a polar domain signal having amplitude and phase components. By modifying the first sample in this manner, either or both the amplitude and phase components have reduced high-frequency content compared to a polar domain signal that would be generated without the first sample having been first modified.