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1. 发明授权

US09559833B1 Frequency synchronization for a near field communication (NFC) device 有权
标题翻译：近场通信（NFC）设备的频率同步
公开(公告)号：US09559833B1
公开(公告)日：2017-01-31
申请号：US14920990
申请日：2015-10-23
申请人： Broadcom Corporation
发明人： Shengyang Xu , Dong-U Lee
IPC分类号： H03D3/24 , H04L7/00 , H04W4/00 , H04W56/00
CPC分类号： H04W56/0035 , H04L27/26 , H04W4/80
摘要： A first near field communication (NFC) device is disclosed that synchronizes a first carrier wave of the first NFC device to a second carrier wave of a second NFC device. The first NFC device observes a magnetic field having the first carrier wave modulated with information corresponding to the first NFC device and the second carrier wave modulated with information corresponding to the second NFC device. The first NFC device isolates the information corresponding to the second NFC device from the combined sequence of information to determine a frequency error and/or a phase error between the carrier waves. Finally, the first NFC device adjusts the frequency of the first carrier wave in accordance with the first frequency error and/or the phase of the first carrier wave in accordance with the first phase error to synchronize the carrier waves.
摘要翻译：公开了第一近场通信（NFC）设备，其将第一NFC设备的第一载波与第二NFC设备的第二载波同步。第一NFC设备观察到具有用与第一NFC设备相对应的信息调制的第一载波的磁场和用与第二NFC设备相对应的信息调制的第二载波。第一NFC设备将与第二NFC设备相对应的信息与组合的信息序列隔离，以确定载波之间的频率误差和/或相位误差。最后，第一NFC设备根据第一相位误差根据第一频率误差和/或第一载波的相位来调整第一载波的频率，以使载波同步。

2. 发明申请

US20160241384A1 CARRIER SYNCHRONIZATION APPROPRIATE FOR ALM NFC DATA TRANSMISSION 有权
标题翻译：携带者同步适用于ALM NFC数据传输
公开(公告)号：US20160241384A1
公开(公告)日：2016-08-18
申请号：US14918284
申请日：2015-10-20
申请人： Broadcom Corporation
发明人： Manolis Frantzeskakis , Dong-U Lee , Divyanshu Jain , Jianhua Gan , Shengyang Xu
IPC分类号： H04L7/02 , H04H60/29 , H04B5/00
CPC分类号： H04B5/0031 , H04L27/0014 , H04L2027/0026 , H04L2027/0055 , H04L2027/0067
摘要： In some aspects, the disclosure is directed to methods and systems for carrier synchronization in active load modulation for near field communications. A broadcast carrier is received from a remote device and mixed with a locally-generated carrier and modulated data. A carrier synchronization circuit synchronizes the locally-generated carrier with the broadcast carrier based on an identified phase error from a double Cartesian-to-polar mapping of the mixed locally-generated carrier and broadcast carrier. In some implementations, the system also includes a modulation suppression circuit for providing unmodulated carrier signals to the carrier synchronization circuit or suppressing modulation distortion to maintain frequency and phase tracking despite the presence of data.
摘要翻译：在一些方面，本公开涉及用于近场通信的有源负载调制中的载波同步的方法和系统。从远程设备接收广播载波并与本地生成的载波和调制数据混合。载波同步电路基于从混合的本地生成的载波和广播载波的双笛卡尔到极坐标映射的所识别的相位误差，使本地生成的载波与广播载波同步。在一些实现中，该系统还包括用于向载波同步电路提供未调制的载波信号或抑制调制失真的调制抑制电路，以便尽管数据存在而保持频率和相位跟踪。

3. 发明授权

US09590701B2 Feedback-based adaptive load modulation (ALM) for a near field communication (NFC) device 有权
标题翻译：用于近场通信（NFC）设备的基于反馈的自适应负载调制（ALM）
公开(公告)号：US09590701B2
公开(公告)日：2017-03-07
申请号：US14809855
申请日：2015-07-27
申请人： Broadcom Corporation
发明人： Dong-U Lee , Divyanshu Jain
IPC分类号： H04B5/00
CPC分类号： H04B5/0075 , H04B5/0031
摘要： A first near field communication (NFC) device or a first NFC-enabled device utilizes a feedback based approach to allow for dynamic adjusting of one or more operating characteristics. The feedback based approach can be a direct feedback based approach or an indirect feedback based approach. In the direct feedback based approach, a second NFC device or a second NFC-enabled device can communicate information to the first NFC device or the first NFC-enabled device to cause the first NFC device or the first NFC-enabled device to dynamically adjust the one or more operating characteristics. In the indirect feedback based approach, the first NFC device or the first NFC-enabled device can dynamically adjust the one or more operating characteristics in response to the non-occurrence of an event, such as receiving a response command from the second NFC device or the second NFC-enabled device to provide an example.
摘要翻译：第一近场通信（NFC）设备或第一NFC启用设备利用基于反馈的方法来允许动态调整一个或多个操作特性。基于反馈的方法可以是基于直接反馈的方法或基于间接反馈的方法。在基于直接反馈的方法中，第二NFC设备或第二NFC使能设备可以将信息传送到第一NFC设备或第一NFC使能设备，以使第一NFC设备或第一NFC使能设备动态地调整一个或多个操作特性。在基于间接反馈的方法中，第一NFC设备或第一NFC设备可以响应于事件的不发生来动态地调整一个或多个操作特性，诸如从第二NFC设备接收响应命令，或者第二个NFC功能的设备提供了一个例子。

4. 发明申请

US20160072556A1 Feedback-Based Adaptive Load Modulation (ALM) for a Near Field Communication (NFC) Device 有权
标题翻译：用于近场通信（NFC）设备的基于反馈的自适应负载调制（ALM）
公开(公告)号：US20160072556A1
公开(公告)日：2016-03-10
申请号：US14809855
申请日：2015-07-27
申请人： Broadcom Corporation
发明人： Dong-U Lee , Divyanshu Jain
IPC分类号： H04B5/00
CPC分类号： H04B5/0075 , H04B5/0031
摘要： A first near field communication (NFC) device or a first NFC-enabled device utilizes a feedback based approach to allow for dynamic adjusting of one or more operating characteristics. The feedback based approach can be a direct feedback based approach or an indirect feedback based approach. In the direct feedback based approach, a second NFC device or a second NFC-enabled device can communicate information to the first NFC device or the first NFC-enabled device to cause the first NFC device or the first NFC-enabled device to dynamically adjust the one or more operating characteristics. In the indirect feedback based approach, the first NFC device or the first NFC-enabled device can dynamically adjust the one or more operating characteristics in response to the non-occurrence of an event, such as receiving a response command from the second NFC device or the second NFC-enabled device to provide an example.
摘要翻译：第一近场通信（NFC）设备或第一NFC启用设备利用基于反馈的方法来允许动态调整一个或多个操作特性。基于反馈的方法可以是基于直接反馈的方法或基于间接反馈的方法。在基于直接反馈的方法中，第二NFC设备或第二NFC使能设备可以将信息传送到第一NFC设备或第一NFC使能设备，以使第一NFC设备或第一NFC使能设备动态地调整一个或多个操作特性。在基于间接反馈的方法中，第一NFC设备或第一NFC设备可以响应于事件的不发生来动态地调整一个或多个操作特性，诸如从第二NFC设备接收响应命令，或者第二个NFC功能的设备提供了一个例子。

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