发明授权
- 专利标题: Method to enable single frequency network optimization
- 专利标题(中): 启用单频网络优化的方法
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申请号: US11143044申请日: 2005-06-02
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公开(公告)号: US07822149B2公开(公告)日: 2010-10-26
- 发明人: Eric A. Dibiaso , Michael L. Hiatt, Jr. , Glenn A. Walker
- 申请人: Eric A. Dibiaso , Michael L. Hiatt, Jr. , Glenn A. Walker
- 申请人地址: US MI Troy
- 专利权人: Delphi Technologies, Inc.
- 当前专利权人: Delphi Technologies, Inc.
- 当前专利权人地址: US MI Troy
- 代理商 Jimmy L. Funke
- 主分类号: H04L27/20
- IPC分类号: H04L27/20
摘要:
Additional data may be added to the current SDARS satellite signals as a phase and/or amplitude offset from the legacy quadrature phase shift keying (QPSK) modulated data and transmitted by the SDAR terrestrial repeaters. However, in the case where a legacy receiver architecture for a differential modulation system outputs angular/phase differences between carriers, the phase and/or amplitude information appears as distortion to the legacy receiver. The present invention provides a method for optimizing the SDARS infrastructure more efficiently by allowing independent adjustment of the phase and/or amplitude offset (610) at each terrestrial site. The present invention provides a method for adjusting the performance of each signal together or separately as needed.
公开/授权文献
- US20060274855A1 Method to enable single frequency network optimization 公开/授权日:2006-12-07