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    • 8. 发明授权
    • High sensitivity GLONASS/GPS automatic frequency control
    • 高灵敏度GLONASS / GPS自动频率控制
    • US08754809B2
    • 2014-06-17
    • US13041312
    • 2011-03-04
    • Hao ZhouHao-Jen ChengQinfang Sun
    • Hao ZhouHao-Jen ChengQinfang Sun
    • G01S19/24G01S19/21G01S19/29
    • G01S19/29
    • Updates to an AFC loop can be performed to provide high-sensitivity tracking. A 20 ms update interval and PDI=10 ms is used for every other update. A setting is used for each update between the 20 ms updates. Notably, the setting uses PDI=5 ms. The setting can include first, second, and third cross-dot pairs associated with a first bit, a second bit, and a cross-bit boundary between the first and second bits, respectively. A sum of these pairs can be scaled down when the signal strength is below a predetermined threshold. In another embodiment, the setting can include a first cross-dot pair associated with a first bit and a second cross-dot pair associated with a second bit. A sum of these pairs can also be scaled down when signal strength is below a predetermined threshold.
    • 可以执行AFC循环的更新以提供高灵敏度跟踪。 每隔一个更新使用20 ms的更新间隔和PDI = 10 ms。 每个20 ms更新之间的更新使用一个设置。 值得注意的是,该设置使用PDI = 5 ms。 该设置可以分别包括与第一位,第二位和第一和第二位之间的跨位边界相关联的第一,第二和第三十字点对。 当信号强度低于预定阈值时,这些对的总和可以缩小。 在另一个实施例中,该设置可以包括与第一位相关联的第一交叉点对和与第二位相关联的第二交叉点对。 当信号强度低于预定阈值时,这些对的总和也可以缩小。
    • 9. 发明授权
    • Continuity of function of a GPS receiver during power cycling
    • 电力循环期间GPS接收机的功能连续性
    • US08731110B1
    • 2014-05-20
    • US13032452
    • 2011-02-22
    • Hao ZhouAku-Matti T. Levola
    • Hao ZhouAku-Matti T. Levola
    • H03K9/00
    • G01S19/34G01S19/37
    • A GPS receiver includes an RF section and a digital section, the digital section including a correlator circuit for performing correlation with respect to a plurality of satellite channels. The GPS receiver is operated by cycling power to the RF section on and off according to a determined duty cycle having an ON portion and an OFF portion. During the ON portion, navigation related data received from the plurality of satellite channels is sampled by higher level software. Continuity of function may be achieved by resetting a state of at least a portion of the correlator circuit in correspondence to a transition from the OFF portion to the ON portion.
    • GPS接收机包括RF部分和数字部分,数字部分包括用于对多个卫星信道进行相关的相关器电路。 GPS接收机通过根据确定的具有ON部分和OFF部分的占空比将功率循环到RF部分来开启和关闭来操作。 在ON部分,从多个卫星信道接收的导航相关数据被较高级别的软件采样。 可以通过根据从OFF部分到ON部分的转变来重置相关器电路的至少一部分的状态来实现功能的连续性。
    • 10. 发明授权
    • Enabling stateless server-based pre-shared secrets
    • 启用基于无状态的基于服务器的预共享机密
    • US08166301B2
    • 2012-04-24
    • US11843292
    • 2007-08-22
    • Nancy Cam-WingetHao ZhouPadmanabha C. JakkahalliJoseph SaloweyDavid A. McGrew
    • Nancy Cam-WingetHao ZhouPadmanabha C. JakkahalliJoseph SaloweyDavid A. McGrew
    • H04L29/06
    • H04L63/0435H04L9/0822H04L9/0841H04L63/08H04L67/14
    • A method is disclosed for enabling stateless server-based pre-shared secrets. Based on a local key that is not known to a client, a server encrypts the client's state information. The client's state information may include, for example, the client's authentication credentials, the client's authorization characteristics, and a shared secret key that the client uses to derive session keys. By any of a variety of mechanisms, the encrypted client state information is provided to the client. The server may free memory that stored the client's state information. When the server needs the client's state information, the client sends, to the server, the encrypted state information that the client stored. The server decrypts the client state information using the local key. Because each client stores that client's own state information in encrypted form, the server does not need to store any client's state information permanently.
    • 公开了一种实现无状态的基于服务器的预共享机密的方法。 基于客户端不知道的本地密钥,服务器加密客户端的状态信息。 客户端的状态信息可以包括例如客户端的认证凭证,客户端的授权特征以及客户端用于导出会话密钥的共享秘密密钥。 通过各种机制中的任一种,加密的客户端状态信息被提供给客户端。 服务器可以释放存储客户端状态信息的内存。 当服务器需要客户端的状态信息时,客户端向服务器发送客户端存储的加密状态信息。 服务器使用本地密钥解密客户端状态信息。 因为每个客户端都以加密形式存储客户端自己的状态信息,服务器不需要永久存储任何客户端的状态信息。