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    • 1. 发明申请
    • TRANSMIT DIVERSITY AND SEPARATING MULTIPLE LOOPBACK SIGNALS
    • 发射多样性和分离多重回波信号
    • WO2004075459A2
    • 2004-09-02
    • PCT/US2004/003911
    • 2004-02-10
    • ERICSSON INC.DENT, PaulZANGI, Kambiz
    • DENT, PaulZANGI, Kambiz
    • H04L
    • H04L25/03343H04B1/7105H04B7/005H04B7/022H04B7/0615H04B7/0617H04B7/0619H04L1/243H04L25/0202H04L25/0204H04L25/0212H04L25/0226H04L25/0228H04L25/0244H04L27/367H04W52/42
    • A wireless communication network processes composite loop-back signals received at one or more network antennas from a plurality of mobile stations, each transmitting an individual, mobile-specific loop-back signal. Using its knowledge of the prior network-transmitted signal(s) from which the mobile stations derive their individual loop-back signals, and its knowledge of the mobile-specific loop-back signal modifications made by each of the mobile stations, the network derives mobile-specific downlink channel information based on processing the composite loop-back signals. That is, use of the mobile-specific loop-back signals enables the network to determine downlink channel estimates as between each participating network antenna and each participating mobile station to be used for transmit signal interference and/or power pre­compensation, for example. Mobile stations incorporate loop-back signal sample processors used to impart mobile-specific modifications to signal samples obtained from network-transmitted signals. The modified signal samples, thus "imprinted," are then transmitted back to the network.
    • 无线通信网络处理在多个移动站的一个或多个网络天线处接收的复合环回信号,每个移动台发送单独的移动专用环回信号。 使用其关于移动台从其中导出其各自的环回信号的先前的网络发送信号的知识以及由每个移动站进行的移动专用环回信号修改的知识,网络导出 基于处理复合环回信号的移动专用下行链路信道信息。 也就是说,使用移动专用环回信号使得网络能够确定例如在每个参与的网络天线和每个参与的移动台之间的下行链路信道估计,以用于发射信号干扰和/或功率预补偿。 移动台包含环回信号采样处理器,用于对从网络传输信号获得的信号样本进行移动专用修改。 然后将经修改的信号样本“印迹”传送回网络。
    • 2. 发明申请
    • SECURITY SYSTEM
    • 保安系统
    • WO2002095689A1
    • 2002-11-28
    • PCT/US2002/013730
    • 2002-05-02
    • ERICSSON INC.DENT, PaulSKUBIC, Janez
    • DENT, PaulSKUBIC, Janez
    • G07C9/00
    • G07C9/00309G07C9/00904G07C2009/00396G07C2009/00793G07C2209/08H04L9/3271H04L63/108H04L2209/80H04W12/06H04W12/08
    • An access control system includes an access control device, a wireless communication device, and a central controller. The central controller issues authorization codes to the wireless communication device. The wireless communication device is used by an authorized party to enable or activate a protected function secured by an access control device. To enable or activate the protected function, the authorized party uses the wireless communication device to transmit an access request to the access control device, which responds by transmitting an authentication challenge to the wireless communication device. The wireless communication device must transmit a valid authentication response based on the authentication challenge and a valid authorization code stored in its memory. If a valid authentication response is received, the access control device enables or activates the protected function.
    • 访问控制系统包括访问控制设备,无线通信设备和中央控制器。 中央控制器向无线通信设备发出授权码。 无线通信设备被授权方使用以启用或激活由访问控制设备保护的受保护功能。 为了启用或激活受保护的功能,授权方使用无线通信设备向访问控制设备发送访问请求,该访问控制设备通过向无线通信设备发送认证挑战进行响应。 无线通信设备必须基于认证质询和存储在其存储器中的有效授权码来发送有效的认证响应。 如果接收到有效的认证响应,则访问控制设备启用或激活受保护的功能。
    • 4. 发明申请
    • INTEGRATED, DIGITALLY-CONTROLLED CRYSTAL OSCILLATOR
    • 集成的数字控制晶体振荡器
    • WO2004027979A1
    • 2004-04-01
    • PCT/US2003/026453
    • 2003-08-22
    • ERICSSON INC.DENT, PaulKLEMMER, Nikolaus
    • DENT, PaulKLEMMER, Nikolaus
    • H03B5/32
    • H03B5/366H03B5/32
    • A quartz crystal oscillator comprises a balanced circuit with a quartz crystal resonator device connected in series resonance across a balanced, low impedance node within a sustaining amplifier. A phase modulator such as a quadrature modulator is included in the feedback loop to allow programming of the loop phase shift thereby to alter the frequency point on the crystal resonance curve at which the circuit oscillates. The in phase loop signal is hardlimited while the quadrature loop signal component is not hardlimited with the effect that the frequency control curve slope is more accurately defined. An active neutralization of the crystal's parasitic shunt capacitance is disclosed for obtaining a linear frequency control curve.
    • 石英晶体振荡器包括具有石英晶体谐振器装置的平衡电路,其在保持放大器内的平衡,低阻抗节点上串联谐振连接。 在反馈回路中包括诸如正交调制器的相位调制器,以允许编程环路相移,从而改变电路振荡的晶体谐振曲线上的频率点。 同相环路信号是硬限制的,而正交环路信号分量不受硬限制,具有更准确地定义频率控制曲线斜率的效果。 公开了用于获得线性频率控制曲线的晶体寄生并联电容的主动中和。
    • 6. 发明申请
    • TIMING CORRECTION CIRCUIT FOR DIGITAL TRANSCEIVERS
    • 数字收发机定时校正电路
    • WO2004028068A1
    • 2004-04-01
    • PCT/US2003/029763
    • 2003-09-18
    • ERICSSON INC.DENT, Paul
    • DENT, Paul
    • H04L7/00
    • H04L7/02H04B2001/70706H04L7/0029H04L2027/0022H04L2027/0055
    • A transceiver for a code division multiple access communication system comprises a receiver to receive coded information signals and a transmitter to transmit coded information signals. A local oscillator provides a time and frequency reference for the receiver and the transmitter. A timing controller provides timing signals for the receiver and the transmitter. A signal processor decodes received signals to determine a common error (33) associated with the timing controller. A timing correction circuit (18) smoothly adjusts the timing of the coded information signals transmitted by the transmitter responsive to the timing error to reduce the timing error over a desired time interval.
    • 用于码分多址通信系统的收发机包括接收编码信息信号的接收机和发送编码信息信号的发射机。 本地振荡器为接收机和发射机提供时间和频率参考。 定时控制器为接收机和发射机提供定时信号。 信号处理器对接收到的信号进行解码以确定与定时控制器相关联的公共误差(33)。 定时校正电路(18)根据定时误差平滑地调整由发射机发送的编码信息信号的定时,以在期望的时间间隔内减少定时误差。
    • 8. 发明申请
    • SYSTEM AND METHOD FOR ADAPTIVE ANTENNA IMPEDANCE MATCHING
    • 用于自适应天线阻抗匹配的系统和方法
    • WO2004098076A1
    • 2004-11-11
    • PCT/US2004/013740
    • 2004-04-23
    • ERICSSON INC.DENT, PaulDOLMAN, Rodney A.
    • DENT, PaulDOLMAN, Rodney A.
    • H04B1/18
    • H03F3/24H03H7/40H04B1/005H04B1/0057H04B1/0458H04B1/406
    • A transceiver includes a transmitter and a homodyne receiver, wherein the receiver is used to process both antenna-received and antenna-reflected signals. Thus, during a receive mode, for example, the receiver downconverts antenna-received signals to baseband signals, which are then processed to recover receive signal information. Then, during a transmit mode for example, antenna-reflected transmit signals are fed back to the receiver, which is retuned to the desired transmit frequency, and thus downconverts the reflected transmit signals to baseband signals. These baseband signals are then processed to obtain a characterization of impedance mismatch between the transceiver's transmitter and the associated antenna. An adjustable matching network disposed in the transmit signal path thus may be adjusted based on the characterization to reduce the mismatch. Such configurations may be used with either single-band or multi-band embodiments of the transceiver, and the transceiver may be used in both TDMA and CDMA communication systems.
    • 收发机包括发射机和零差接收机,其中接收机用于处理天线接收天线和天线反射信号。 因此,在接收模式期间,例如,接收机将天线接收的信号下变频到基带信号,然后将其处理以恢复接收信号信息。 然后,例如,在发送模式期间,天线反射的发送信号被反馈到接收机,接收机被重新连接到期望的发送频率,并且因此将反射的发送信号下变频到基带信号。 然后处理这些基带信号以获得收发器的发射机和相关天线之间的阻抗失配的表征。 因此,可以基于表征调整设置在发射信号路径中的可调匹配网络,以减少不匹配。 这样的配置可以与收发器的单频带或多频带实施例一起使用,并且收发器可以在TDMA和CDMA通信系统中使用。
    • 9. 发明申请
    • FAST, HIGH RESOLUTION DIGITAL-TO-ANALOG CONVERTER
    • 快速,高分辨率数字到模拟转换器
    • WO2008074599A2
    • 2008-06-26
    • PCT/EP2007/062877
    • 2007-11-27
    • Telefonaktiebolaget LM Ericsson (publ)DENT, Paul
    • DENT, Paul
    • H03M1/82
    • H03M1/667
    • A fast, high resolution digital-to-analog converter (DAC) is described herein. The DAC comprises a pulse generator, decay circuit, controller, and sample circuit. The pulse generator serially outputs pulses representing digits of a digital word least significant digit first. Each pulse generates a response in the decay circuit that decays over time according to a known decay response. One exemplary decay circuit comprises an RC circuit having an exponential decay response. The controller controls the timing of the pulses output by the pulse generator such that the period of each pulse relates to a predetermined decay amount. The sample circuit samples an output of the decay circuit at a sample time after the decay circuit receives the pulse for the most significant digit. The sampled output represents the analog value corresponding to the input digital word. The digital word may have any length, radix, or format.
    • 这里描述了一种快速,高分辨率的数模转换器(DAC)。 DAC包括脉冲发生器,衰减电路,控制器和采样电路。 脉冲发生器首先串行地输出表示数字字最低有效数字的数字的脉冲。 每个脉冲在衰减电路中产生响应,该响应根据已知的衰减响应随时间衰减。 一个示例性的衰减电路包括具有指数衰减响应的RC电路。 控制器控制由脉冲发生器输出的脉冲的定时,使得每个脉冲的周期与预定衰减量相关。 采样电路在衰减电路接收到最高有效位的脉冲后的采样时间对衰减电路的输出进行采样。 采样输出表示与输入数字字对应的模拟值。 数字字可能有任何长度,基数或格式。