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31. 发明授权

US06735416B1 Receiver architecture for SDARS full band signal reception having an analog conversion to baseband stage 有权
标题翻译：用于SDARS全频带信号接收的接收机架构，具有到基带级的模拟转换
公开(公告)号：US06735416B1
公开(公告)日：2004-05-11
申请号：US09318149
申请日：1999-05-25
申请人： Paul Marko , David L. Brown , Craig Wadin
发明人： Paul Marko , David L. Brown , Craig Wadin
IPC分类号： H04H100
CPC分类号： H04H40/90 , H04H20/06 , H04H20/42 , H04H20/74 , H04H2201/19
摘要： A receiver adapted to receive a signal having at least first and second carrier frequencies on which first and second information signals are modulated, respectively. The inventive receiver further includes circuitry for converting the received signal to a complex baseband signal. In the illustrative embodiment, the received signal includes first and second ensembles. The first ensemble includes a first signal from a first source, a first signal from a second source and a first signal from a third source. The second ensemble includes a second signal from the first source, a second signal from the second source and a second signal from the third source. The receiver is adapted to selectively output the first and/or the second ensemble. Conversion of the band is achieved with quad mixers. The outputs of the mixers are digitized and selectively provided as the first and/or the second ensemble by a digital translation stage.
摘要翻译：一种适于接收具有分别在其上调制第一和第二信息信号的至少第一和第二载波频率的信号的接收机。本发明的接收机还包括用于将接收信号转换成复基带信号的电路。在说明性实施例中，接收信号包括第一和第二组合。第一集合包括来自第一源的第一信号，来自第二源的第一信号和来自第三源的第一信号。第二集合包括来自第一源的第二信号，来自第二源的第二信号和来自第三源的第二信号。接收器适于选择性地输出第一和/或第二组合。使用四重混合器实现频带的转换。混合器的输出通过数字转换级数字化并选择性地提供为第一和/或第二合奏。

32. 发明授权

US5392331A Method and apparatus for performing a hand-off in a wireless communication system 失效
标题翻译：用于在无线通信系统中执行越区切换的方法和装置
公开(公告)号：US5392331A
公开(公告)日：1995-02-21
申请号：US252139
申请日：1994-05-31
申请人： Stelios J. Patsiokas , Craig Wadin , Paul Marko , Prathivadhi B. Krishna
发明人： Stelios J. Patsiokas , Craig Wadin , Paul Marko , Prathivadhi B. Krishna
IPC分类号： H04W36/18 , H04W56/00 , H04M11/00 , H04Q7/00
CPC分类号： H04W36/18 , H04W56/00
摘要： A method and apparatus in a digital wireless communication system (100) controls an inter-cell hand-off. First and second fixed units (102) receive a common synchronization signal from a controller (104), and a first wireless link is established between the first fixed unit and a portable unit (120) on a first frequency. The first wireless link is synchronized to the common synchronization signal, and frame synchronization is obtained between the fixed unit (102) and the portable unit (120) during establishment of the first wireless link. Frame synchronization is maintained only by maintaining bit synchronization while transmitting user data on the first frequency. A second wireless link is established between the second fixed unit (102) and the portable unit (120) on the first frequency if the first frequency is usable therebetween. The second wireless link is synchronized to the common synchronization signal. The first wireless link is disconnected after the second wireless link is established, thereby seamlessly completing the inter-cell hand-off.
摘要翻译：数字无线通信系统（100）中的方法和装置控制小区间切换。第一和第二固定单元（102）从控制器（104）接收公共同步信号，并且在第一频率上在第一固定单元和便携式单元（120）之间建立第一无线链路。第一无线链路与公共同步信号同步，并且在建立第一无线链路期间在固定单元（102）和便携式单元（120）之间获得帧同步。仅通过在第一频率上传送用户数据的同时保持位同步来保持帧同步。如果在第一频率之间可以使用第一频率，则在第二固定单元（102）和便携式单元（120）之间建立第二无线链路。第二无线链路与公共同步信号同步。在建立第二无线链路之后，第一无线链路被断开，从而无缝地完成小区间切换。

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