发明名称 |
Method to enable single frequency network optimization |
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.
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申请公布号 |
US2006274855(A1) |
申请公布日期 |
2006.12.07 |
申请号 |
US20050143044 |
申请日期 |
2005.06.02 |
申请人 |
DIBIASO ERIC A;HIATT MICHAEL L JR;WALKER GLENN A |
发明人 |
DIBIASO ERIC A.;HIATT MICHAEL L.JR.;WALKER GLENN A. |
分类号 |
H04L27/20 |
主分类号 |
H04L27/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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