发明公开
EP1206866A1 METHOD AND APPARATUS FOR REDUCING PEAK TO AVERAGE POWER RATIO IN DIGITAL BROADCASTING SYSTEMS
有权
方法和装置减少了高峰和中等绩效之间的关系在数字广播系统
- 专利标题: METHOD AND APPARATUS FOR REDUCING PEAK TO AVERAGE POWER RATIO IN DIGITAL BROADCASTING SYSTEMS
- 专利标题(中): 方法和装置减少了高峰和中等绩效之间的关系在数字广播系统
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申请号: EP00957735.4申请日: 2000-08-23
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公开(公告)号: EP1206866A1公开(公告)日: 2002-05-22
- 发明人: SHASTRI, Anjali , KROEGER, Brian, William
- 申请人: IBIQUITY DIGITAL CORPORATION
- 申请人地址: 8865 Stanford Boulevard,Suite 202 Columbia, MD 21045 US
- 专利权人: IBIQUITY DIGITAL CORPORATION
- 当前专利权人: IBIQUITY DIGITAL CORPORATION
- 当前专利权人地址: 8865 Stanford Boulevard,Suite 202 Columbia, MD 21045 US
- 代理机构: Luckhurst, Anthony Henry William
- 优先权: US379780 19990824
- 国际公布: WO0115402 20010301
- 主分类号: H04L27/26
- IPC分类号: H04L27/26
摘要:
This invention provides a method for reducing peak to average power ratio in a radio frequency signal. The method comprises the steps of modulating a plurality of subcarriers with a plurality of data symbol vectors to produce a first modulated signal; limiting the magnitude of the first modulated signal to produce a first limited modulated signal; demodulating the first limited modulated signal to recover the constellation points; predistorting the data symbol vectors to provide a minimum magnitude for in-phase and quadrature components thereof to produce predistorted data symbol vectors; modulating the plurality of carriers with the predistorted data symbol vectors to produce a second modulated signal; limiting the magnitude the second modulated signal to produce a second limited modulated signal; and reducing intermodulation products in the second limited modulated signal. Transmitters that perform the method are also included.
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