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1. 发明授权

US06784831B1 Method and apparatus for GPS signal receiving that employs a frequency-division-multiplexed phased array communication mechanism 失效
标题翻译：采用频分复用相控阵通信机制的GPS信号接收方法和装置
公开(公告)号：US06784831B1
公开(公告)日：2004-08-31
申请号：US10429492
申请日：2003-05-05
申请人： James June-Ming Wang , Chau-Chin Yang , Wen Yen Lin
发明人： James June-Ming Wang , Chau-Chin Yang , Wen Yen Lin
IPC分类号： G01S502
CPC分类号： G01S19/21 , G01S19/22 , G01S19/36 , H01Q21/065
摘要： An improved GPS signal receiver (and corresponding method of operation) includes a plurality of antenna elements each receiving a plurality of GPS signals (e.g., GPS LI signals or GPS L2 signals). A plurality of mixers (which correspond to the array of antenna elements) and a combining node convert the GPS signals received at the antenna elements in a frequency-division-multiplexed (FDM) manner over FDM frequency bands logically assigned to the antenna elements to produce a composite signal representing such GPS signals. An analog-to-digital converter converts an analog signal derived from the composite signal (which may be an intermediate frequency signal or a baseband signal) into a digital word stream. Demultiplexing logic extracts GPS signal components in the digital word stream. The GPS signal components correspond to the FDM frequency bands logically assigned to the antenna elements. Beam forming logic, operably coupled to the demultiplexing logic, applies variable phase delay and variable gain to each GPS component in accordance with a set of weight values supplied thereto. Preferably, the beam forming logic is controlled to perform adaptive beam steering/nulling operations that provide for interference cancellation, multipath rejection and improved signal reception.
摘要翻译：改进的GPS信号接收机（及相应的操作方法）包括多个天线元件，每个天线元件接收多个GPS信号（例如，GPS L1信号或GPS L2信号）。多个混合器（其对应于天线元件阵列）和组合节点通过在逻辑上分配给天线元件的FDM频带上以频分复用（FDM）方式在天线元件处接收的GPS信号转换以产生表示这种GPS信号的复合信号。模拟 - 数字转换器将从复合信号（其可以是中频信号或基带信号）导出的模拟信号转换为数字字流。解复用逻辑提取数字字流中的GPS信号分量。 GPS信号分量对应于逻辑地分配给天线元件的FDM频带。可操作地耦合到解复用逻辑的光束形成逻辑根据提供给其的一组权重值向每个GPS分量施加可变相位延迟和可变增益。优选地，波束形成逻辑被控制以执行提供干扰消除，多路径抑制和改进的信号接收的自适应波束导向/归零操作。

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