公开(公告)号：WO2007065143A3

公开(公告)日：2007-06-07

申请号：PCT/US2006/061455

申请日：2006-12-01

Applicant: SIRIUS SATELLITE RADIO, INC. ,  SCARPA, Carl ,  SAZZAD, Sharif ,  STROLLE, Christopher

Inventor： SCARPA, Carl ,  SAZZAD, Sharif ,  STROLLE, Christopher

IPC: H04B7/08 ,  H04B1/06

Abstract: Systems and methods are presented for digital antenna diversity combining. In exemplary embodiments of the present invention, at least two antenna signal paths can be communicably connected to a receiver. Each antenna signal path can be provided with an RF tuner communicably connected to a demodulator, which can estimate the signal to noise ratio (SNR) and time of arrival of its respective antenna signal. In operation, a time alignment circuit can use the time of arrival estimate to align the multiple signals and the maximum ratio combiner can use the SNR estimate obtained for each antenna signal to respectively weight each signal and thereby generate a combined output signal.

公开(公告)号：WO2007065143A2

公开(公告)日：2007-06-07

申请号：PCT/US2006061455

申请日：2006-12-01

Applicant: SIRIUS SATELLITE RADIO INC ,  SCARPA CARL ,  SAZZAD SHARIF ,  STROLLE CHRISTOPHER

Inventor： SCARPA CARL ,  SAZZAD SHARIF ,  STROLLE CHRISTOPHER

IPC: H04B7/08 ,  H04B1/06

CPC classification number: H04B7/0871 ,  H04B7/0868

Abstract: Systems and methods are presented for digital antenna diversity combining. In exemplary embodiments of the present invention, at least two antenna signal paths can be communicably connected to a receiver. Each antenna signal path can be provided with an RF tuner communicably connected to a demodulator, which can estimate the signal to noise ratio (SNR) and time of arrival of its respective antenna signal. In exemplary embodiments of the present invention, a time alignment circuit can be communicably connected to each antenna signal path, and a maximum ratio combiner can be communicably connected to the time alignment circuit. In operation, the time alignment circuit can use the time of arrival estimate to align the multiple signals and the maximum ratio combiner can use the SNR estimate obtained for each antenna signal to respectively weight each signal and thereby generate a combined output signal. In exemplary embodiments of the present invention, a switch diversity combiner can be further provided, and can quickly detect when an antenna signal is entering a fade, allowing the maximum ratio combiner to set that signal's weight to zero. In exemplary embodiments of the present invention, a digital diversity combiner can be provided in a stand alone integrated circuit, or can be integrated in a larger integrated circuit, such as, for example, a satellite radio overlay processor.

Abstract translation: 提出了数字天线分集组合的系统和方法。 在本发明的示例性实施例中，至少两个天线信号路径可以可通信地连接到接收机。 每个天线信号路径可以设置有可通信地连接到解调器的RF调谐器，RF调谐器可估计其各自天线信号的信噪比（SNR）和到达时间。 在本发明的示例性实施例中，时间对准电路可以可通信地连接到每个天线信号路径，并且最大比率组合器可以可通信地连接到时间对准电路。 在操作中，时间对准电路可以使用到达时间估计来对准多个信号，并且最大比组合器可以使用为每个天线信号获得的SNR估计来分别对每个信号加权，从而生成组合的输出信号。 在本发明的示例性实施例中，可以进一步提供开关分集组合器，并且可以快速检测天线信号何时进入衰落，允许最大比组合器将该信号的权重设置为零。 在本发明的示例性实施例中，数字分集组合器可以设置在独立的集成电路中，或者可以集成在更大的集成电路中，例如卫星无线电覆盖处理器。