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    • 1. 发明授权
    • Digital signal detector
    • 数字信号检测器
    • US4197502A
    • 1980-04-08
    • US951896
    • 1978-10-16
    • Terence E. SumnerCharles A. Backof, Jr.
    • Terence E. SumnerCharles A. Backof, Jr.
    • H04L25/40G01R23/15H04L1/20H04L7/033H04L25/02H04Q1/448H04B1/10
    • H04Q1/4485G01R23/155H04L1/20
    • A digital signal detector is disclosed that detects a serial bit stream transmitted at a predetermined bit frequency. Bit transitions are totallized in a counter over a predetermined time interval. Bit transitions occurring during a good window interval increment the totallized count by one. Bit transitions occurring during a bad window interval decrement the totallized count by one. Bit transitions occurring during a marginal window interval, situated between the good and bad window intervals, do not affect the totallized count. If the counter reaches a predetermined count during the time interval, a detect signal is provided indicating that the digital signal has been detected. The counter can be further loaded with a threshold count for tailoring the digital signal detector for operation at a particular signal-to-noise ratio. Periodic signals that have frequencies that are submultiples of the bit frequency are detected by correlating the digital signal between two predetermined stages of a shift register. The digital signal detector may provide a detector output signal when both the digital signal is detected and periodic signals having submultiple frequencies are not present.
    • 公开了一种数字信号检测器,其检测以预定位频率发送的串行比特流。 位转换在预定时间间隔内在计数器中进行总和。 在良好的窗口间隔期间发生的位转换将总计数增加1。 在错误窗口间隔期间发生的位转换将总计数减1。 在边缘窗口间隔期间发生的位转换位于良好和不良窗口间隔之间,不影响总计数。 如果在时间间隔期间计数器达到预定的计数,则提供指示已经检测到数字信号的检测信号。 该计数器可以进一步加载阈值计数,用于定制数字信号检测器以在特定信噪比下操作。 通过将移位寄存器的两个预定级之间的数字信号相关联来检测具有位频率的次数的频率的周期性信号。 当检测到数字信号并且不存在具有多个频率的周期信号时,数字信号检测器可以提供检测器输出信号。
    • 2. 发明授权
    • Method and apparatus for conveying a private message to selected members
    • 将私人消息传送给所选成员的方法和装置
    • US06782475B1
    • 2004-08-24
    • US09600421
    • 2000-07-13
    • Terence E. Sumner
    • Terence E. Sumner
    • H04L900
    • H04L12/18H04L9/0833H04L9/14H04L63/0428H04L63/065H04L2209/601
    • An encrypted broadcast messaging system determines the management crypto-keys held by each selected subscriber device and not held by each excluded subscriber device of a group. The private message is decomposed into message-parts, one message-part per an excluded subscriber device, each message-part intended to be encrypted using each management crypto-key held by the selected subscriber devices and not held by the excluded subscriber device. Each message-part is encrypted using the intended management crypto-keys, and delivered to at least the selected subscriber devices, identifying the message-parts delivered and the message-parts necessary to re-compose the private message. Each received encrypted message-part is decrypted using the intended management crypto-key, and the necessary message-parts are chosen from which the private message is re-composed by combining in the selected subscriber devices.
    • 加密的广播消息收发系统确定由每个选定的用户设备保持的并且不由组的每个被排除的订户设备保存的管理密钥。 私人消息被分解为消息部分,每个排除的订户设备的一个消息部分,每个消息部分旨在使用由所选择的用户设备保存并且不被排除的订户设备保持的每个管理密钥进行加密。 每个消息部分使用预期的管理加密密钥进行加密,并且传送到至少所选择的订户设备,识别所传递的消息部分以及重新组合私人消息所需的消息部分。 每个接收到的加密消息部分使用预期的管理密钥进行解密,并且通过在所选择的订户设备中组合来选择必要的消息部分,通过合并来重新组合专用消息。
    • 4. 发明授权
    • Method and apparatus for self-adjusting a multistage radio frequency
power amplifier
    • 用于自调整多级射频功率放大器的方法和装置
    • US5561395A
    • 1996-10-01
    • US379707
    • 1995-01-27
    • John R. MeltonJoseph G. SchultzTerence E. Sumner
    • John R. MeltonJoseph G. SchultzTerence E. Sumner
    • H03G3/30H03F3/68H03G3/20
    • H03G3/3042
    • A method and apparatus (100) is for providing self adjustment of a multistage radio frequency power amplifier (RFPA) (200). The apparatus (100) includes a transmit input stage (150) and a controller (110). Included in the multistage RFPA (200) are N RFPA stages (201) coupled in parallel to an N-way RF splitter (210) and to an N-way RF combiner (220), and a power sense stage (225) which generates a forward power sense signal (167). Each of the N RFPA stages (210) includes an adjustable power amplifier (PA) (300). The controller (110) optimizes a gain match and a phase match of the multistage RFPA (200) by adjusting signals which are coupled to each adjustable PA (300). The adjustments are made in response to the forward power sense signal (167) while the controller (110) controls the test input stage (150) which generates a predetermined test signal (155).
    • 一种用于提供多级射频功率放大器(RFPA)(200)的自调整的方法和装置(100)。 装置(100)包括发射输入级(150)和控制器(110)。 包括在多级RFPA(200)中的是与N路RF分离器(210)和N路RF组合器(220)并联耦合的N个RFPA级(201)和产生 正向功率检测信号(167)。 每个N RFPA级(210)包括可调功率放大器(PA)(300)。 控制器(110)通过调节耦合到每个可调节PA(300)的信号来优化多级RFPA(200)的增益匹配和相位匹配。 响应于正向功率检测信号(167)进行调整,而控制器(110)控制产生预定测试信号(155)的测试输入级(150)。
    • 8. 发明授权
    • Method and apparatus for reducing interference in a time division duplex
communication system
    • 用于减少时分双工通信系统中的干扰的方法和装置
    • US5515365A
    • 1996-05-07
    • US316975
    • 1994-10-03
    • Terence E. SumnerStephen H. DunkertonJohn R. Melton
    • Terence E. SumnerStephen H. DunkertonJohn R. Melton
    • H04L5/14
    • H04L5/1492
    • A first transmitter (103) reduces an interference in a time division duplex (TDD) communication system (100). The first transmitter (103) alternates from a transmit state in which a first information signal (130) is transmitted to a standby state in which a residual signal (132) is transmitted. The first transmitter (103) includes a transmitter section (142) and a controller (141). The transmitter section (142 transmits the first information signal (130) and the residual signal (132). The transmitter section (142) includes a power amplifier (144) to amplify the first information signal (130) and the residual signal (132) to a power level; and an exciter (143) to control a carrier frequency of the first information signal (130) and the residual signal (132). The controller (141) is coupled to the power amplifier (144) and the exciter (143), for adjusting the power level and setting the carrier frequency.
    • 第一发射机(103)减少时分双工(TDD)通信系统(100)中的干扰。 第一发送器(103)从发送第一信息信号(130)的发送状态与发送残留信号(132)的待机状态交替。 第一发射机(103)包括发射机部分(142)和控制器(141)。 发射机部分(142)发送第一信息信号(130)和残余信号(132),发射机部分(142)包括放大第一信息信号(130)和剩余信号(132)的功率放大器(144) 控制器(141)耦合到功率放大器(144)和激励器(141),该激励器(143)耦合到功率放大器(144)和功率放大器 143),用于调整功率电平和设置载波频率。