Secure communication setup method
    2.
    发明授权
    Secure communication setup method 失效
    安全通信设置方法

    公开(公告)号:US5615266A

    公开(公告)日:1997-03-25

    申请号:US585076

    申请日:1996-01-11

    CPC classification number: H04L9/0891

    Abstract: A call is connected between secure terminals (16) through a network (12). If a network address for the call is included on an approved list (46), a secure call setup procedure (54) is performed automatically. One terminal (16) automatically sends an auto-secure signal. If the other terminal detects the auto-secure signal, secure call setup procedure (54) is performed automatically. The secure call setup procedure (54) determines a current user-identity for the opposing party. If the current user-identity corresponds to a user-identity included on an approved list (76), an abbreviated secure call setup process (80) is performed. If the current user identity is not approved, a full secure call setup process (78) is performed. The abbreviated process (80) differs from the full process (78) in that it uses a traffic key obtained from a prior secure communication session and may be performed more quickly.

    Abstract translation: 呼叫通过网络(12)连接在安全终端(16)之间。 如果用于呼叫的网络地址包括在批准列表(46)中,则自动执行安全呼叫建立过程(54)。 一个终端(16)自动发送一个自动安全信号。 如果其他终端检测到自动安全信号,则自动执行安全呼叫建立过程(54)。 安全呼叫建立过程(54)确定对方的当前用户身份。 如果当前用户身份对应于包含在批准列表(76)上的用户身份,则执行简档安全呼叫建立过程(80)。 如果当前用户身份未被批准,则执行完全安全呼叫建立过程(78)。 缩写过程(80)与完整过程(78)不同之处在于它使用从先前的安全通信会话获得的业务密钥,并且可以更快地执行。

    Method and apparatus for volume switched gain control
    4.
    发明授权
    Method and apparatus for volume switched gain control 失效
    用于音量切换增益控制的方法和装置

    公开(公告)号:US5357567A

    公开(公告)日:1994-10-18

    申请号:US930254

    申请日:1992-08-14

    CPC classification number: H03G3/3089 H04M1/6033

    Abstract: An apparatus comprises a first and a second input and a processor coupled to the inputs. The processor estimates peak and minimum levels of each of the first and second input signals. A first signal regulator is coupled to the first input and to a first output for delivering a first output signal from the first signals. A second signal regulator is coupled to the second input and to a second output for delivering a second output signal from the second audio signals. A gain adjustment device is coupled to the processor and the first and second signal regulators. The gain adjustment device provides control signals to the first and second signal regulators to adjust an output signal level of the first output signal in response to minimum and peak levels of the first and second input signals. The output signal level is continuously variable over a range.

    Abstract translation: 一种装置包括第一和第二输入以及耦合到输入的处理器。 处理器估计第一和第二输入信号中的每一个的峰值和最小电平。 第一信号调节器耦合到第一输入端和第一输出端,​​用于从第一信号传送第一输出信号。 第二信号调节器耦合到第二输入端和第二输出端,用于从第二音频信号传送第二输出信号。 增益调节装置耦合到处理器和第一和第二信号调节器。 增益调整装置向第一和第二信号调节器提供控制信号,以响应于第一和第二输入信号的最小和峰值电平来调整第一输出信号的输出信号电平。 输出信号电平在一个范围内连续变化。

    System and method for demodulating an incoming signal
    5.
    发明授权
    System and method for demodulating an incoming signal 有权
    用于解调输入信号的系统和方法

    公开(公告)号:US09143190B2

    公开(公告)日:2015-09-22

    申请号:US13916146

    申请日:2013-06-12

    CPC classification number: H04B1/709

    Abstract: Methods and receiver circuits are provided for correlating an incoming signal with PN codes. An embodiment of the method includes receiving I/Q baseband samples in the I/Q domain; converting the I/Q baseband samples to phase baseband samples; generating a pseudonoise (PN) code; converting the PN code to PN phase data; performing a correlation on the phase baseband samples using the PN phase data to generate correlated I/Q values; performing an adding operation on the correlated I/Q values to generate demodulated I/Q values; converting the demodulated I/Q values into demodulated phase values; performing a frequency correction operation on the demodulated phase values to generate frequency correction data; converting the demodulated I/Q values into demodulated magnitude values; and performing signal decoding and synchronization on the magnitude values to generate output data. The operation of performing correlation on the phase baseband samples using the PN phase data is accomplished using scalar subtraction.

    Abstract translation: 提供了用于将输入信号与PN码相关联的方法和接收机电路。 该方法的实施例包括:在I / Q域中接收I / Q基带采样; 将I / Q基带采样转换为相位基带采样; 产生伪噪声(PN)码; 将PN码转换成PN相数据; 使用PN相位数据对相位基带采样进行相关,以产生相关的I / Q值; 对相关的I / Q值执行相加操作以产生解调的I / Q值; 将解调的I / Q值转换为解调相位值; 对解调的相位值执行频率校正操作以产生频率校正数据; 将解调的I / Q值转换为解调幅度值; 并对幅度值执行信号解码和同步以产生输出数据。 使用标准减法来实现使用PN相位数据对相位基带采样进行相关的操作。

    Method of reconstructing and delivering segmented messages
    6.
    发明授权
    Method of reconstructing and delivering segmented messages 失效
    重建和传递分段消息的方法

    公开(公告)号:US5563879A

    公开(公告)日:1996-10-08

    申请号:US566412

    申请日:1995-12-01

    CPC classification number: H04B7/1856

    Abstract: A method (50) reconstructs messages from segments (30) which are received in an unknown order and at different times. Each segment (30) comprises a header (31) and payload information (38). The method (50) reconstructs messages from the received segments (30) by reassembling the order as specified in the header (31) of the segment (30). Once the message is reconstructed, the message is delivered. This method (50) is especially important in satellite-based communications where no guarantee exists that the messages will be received in a sequential order or at a specified time.

    Abstract translation: 一种方法(50)重建从未知顺序和不同时间接收的片段(30)的消息。 每个段(30)包括报头(31)和有效载荷信息(38)。 方法(50)通过重新组合在片段(30)的标题(31)中指定的顺序来重构来自接收片段(30)的消息。 一旦消息重建,消息就被传递。 这种方法(50)在基于卫星的通信中是特别重要的,其中不保证消息将以顺序或在指定的时间被接收。

    Secure communication setup method

    公开(公告)号:US5588062A

    公开(公告)日:1996-12-24

    申请号:US501799

    申请日:1995-07-13

    CPC classification number: H04L63/0428 H04M1/663 H04M1/667

    Abstract: A call is connected between secure terminals (16) through a network (12). If a network address for the call is included on an approved list (46), a secure call setup procedure (54) is performed automatically. One terminal (16) automatically sends an auto-secure signal. If the other terminal detects the auto-secure signal, secure call setup procedure (54) is performed automatically. The secure call setup procedure (54) determines a current user-identity for the opposing party. If the current user-identity corresponds to a user-identity included on an approved list (76), an abbreviated secure call setup process (80) is performed. If the current user identity is not approved, a full secure call setup process (78) is performed. The abbreviated process (80) differs from the full process (78) in that it uses a traffic key obtained from a prior secure communication session and may be performed more quickly.

    Secure communication setup method
    8.
    发明授权
    Secure communication setup method 失效
    安全通信设置方法

    公开(公告)号:US5465300A

    公开(公告)日:1995-11-07

    申请号:US172971

    申请日:1993-12-27

    CPC classification number: H04L63/0428 H04M1/663 H04M1/667

    Abstract: A call is connected between secure terminals (16) through a network (12). If a network address for the call is included on an approved list (46), a secure call setup procedure (54) is performed automatically. One terminal (16) automatically sends an auto-secure signal. If the other terminal detects the auto-secure signal, secure call setup procedure (54) is performed automatically. The secure call setup procedure (54) determines a current user-identity for the opposing party. If the current user-identity corresponds to a user-identity included on an approved list (76), an abbreviated secure call setup process (80) is performed. If the current user identity is not approved, a full secure call setup process (78) is performed. The abbreviated process (80) differs from the full process (78) in that it uses a traffic key obtained from a prior secure communication session and may be performed more quickly.

    Abstract translation: 呼叫通过网络(12)连接在安全终端(16)之间。 如果用于呼叫的网络地址包括在批准列表(46)中,则自动执行安全呼叫建立过程(54)。 一个终端(16)自动发送一个自动安全信号。 如果其他终端检测到自动安全信号,则自动执行安全呼叫建立过程(54)。 安全呼叫建立过程(54)确定对方的当前用户身份。 如果当前用户身份对应于包含在批准列表(76)上的用户身份,则执行简档安全呼叫建立过程(80)。 如果当前用户身份未被批准,则执行完全安全呼叫建立过程(78)。 缩写过程(80)与完整过程(78)不同之处在于它使用从先前的安全通信会话获得的业务密钥,并且可以更快地执行。

    Apparatus and method for conveying frame timing, data timing, and data
    9.
    发明授权
    Apparatus and method for conveying frame timing, data timing, and data 失效
    用于传送帧定时,数据定时和数据的装置和方法

    公开(公告)号:US5581390A

    公开(公告)日:1996-12-03

    申请号:US509920

    申请日:1995-08-01

    CPC classification number: H04L7/0075 H04B7/1856

    Abstract: A space-based communications network (10) includes satellites (12) placed in low-earth orbits (14). Satellites (12) engage in bulk communications with central switching offices (CSOs 22) and round control stations (GCSs 24). CSOs (22) and GCSs (24) include a network gateway (30) and any number-of remotely located earth terminals (32). Network gateway may provide telemetry, tracking and control functions for the constellation of satellites. Data are conveyed between the gateway (30) and earth terminals (32) over fiber optic cables (42) which convey a variety of different signals. Opposing unidirectional primary and secondary data communication channels each include signal sets having a gapped clock signal (76) and a data signal (86). The gapped clock signal (76) oscillates in synchronism with the data signal (86) and conveys both data timing and frame timing cable bundles (42) additionally convey LAN signals.

    Abstract translation: 基于空间的通信网络(10)包括放置在低地球轨道(14)中的卫星(12)。 卫星(12)与中央交换局(CSO 22)和圆形控制站(GCS 24)进行批量通信。 CSO(22)和GCS(24)包括网络网关(30)和任何数量的远程定位的接地终端(32)。 网络网关可以为卫星星座提供遥测,跟踪和控制功能。 数据通过传送各种不同信号的光纤电缆(42)在网关(30)和接地端子(32)之间传送。 相反的单向主要和次要数据通信信道各自包括具有间隔时钟信号(76)和数据信号(86)的信号组。 间隙时钟信号(76)与数据信号(86)同步地振荡,并且传送数据定时和帧定时电缆束(42)两者另外传送LAN信号。

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