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182 条记录 (耗时 0.014 秒)

    RADIO LOOP-BACK
    93.
    发明公开
    RADIO LOOP-BACK 审中-公开
    FUNK-PRÜFSCHLEIFE

    公开(公告)号：EP2033328A1

    公开(公告)日：2009-03-11

    申请号：EP07719975.0

    申请日：2007-06-15

    申请人： Dragonwave, Inc.

    发明人： HINDSON, Dan ,  COOPER, Michael

    IPC分类号： H04B1/40 ,  H04B1/04 ,  H04B1/16 ,  H04B17/00

    CPC分类号： H04B17/19 ,  H04B17/102

    摘要： A radio having a transmitter, a receiver, and a loop-back circuit is provided. The loop-back circuit, when engaged, feeds a transmission from the transmitter to the receiver. According to an embodiment of the invention, the loop-back circuit utilises at least one electronic component that is also used by the transmitter or the receiver. This can reduce a number of electronic components of the radio. The at least one electronic component might for example include a mixer and/or an oscillator. The mixer generates a mixer output by mixing a signal from the oscillator with the transmission from the transmitter. The loop-back circuit provides the mixer output to the receiver when the loop-back circuit is engaged. In specific implementations, both the mixer and the oscillator are used by the transmitter.

    COMMUNICATION STATION WITH AUTOMATIC CABLE LOSS COMPENSATION
    94.
    发明授权
    COMMUNICATION STATION WITH AUTOMATIC CABLE LOSS COMPENSATION 有权
    具有自动电缆损耗补偿通信基站

    公开(公告)号：EP1147621B9

    公开(公告)日：2004-08-18

    申请号：EP99967532.5

    申请日：1999-12-23

    申请人： INTERDIGITAL TECHNOLOGY CORPORATION

    发明人： BIRD, John ,  KAZAKEVICH, Leonid

    IPC分类号： H04B3/36 ,  H04Q7/30

    CPC分类号： H04W88/08 ,  H04B3/36 ,  H04B17/102 ,  H04B17/18

    摘要： A wireless communications system employing code-division multiple access information transmission techniques includes a transmission facility having ground-based transmission and reception electronic equipment, a remotely located RF power amplifier, an antenna, and an RF cable connecting the ground-based equipment with the remotely located RF power amplifier. Power level detectors in the ground-based equipment and in the remotely located RF power amplifier measure the signal level at each end of the RF cable. A microcontroller compares these measurements and adjusts a variable attenuator in the transmission signal path and a variable attenuator in the received signal path to compensate for signal level variability due to variations in signal loss.

    A method and system for power control of a wireless communication device, and a wireless communication device
    95.
    发明公开
    A method and system for power control of a wireless communication device, and a wireless communication device 审中-公开
    的方法和系统的无线通信装置的功率控制和无线通信设备

    公开(公告)号：EP1322054A1

    公开(公告)日：2003-06-25

    申请号：EP02396186.5

    申请日：2002-12-19

    申请人： Nokia Corporation

    发明人： Janvisalo, Jari ,  Rimpela, Riku ,  Oksala, Jarkko ,  Alltonen, Janne

    IPC分类号： H04B17/00

    CPC分类号： H04B17/102

    摘要： The present invention relates to a method for power control of a wireless communication device (2). The method comprises the step of defining the transmission power of at least one transmitter (12) of the wireless communication device (2). Additionally, the method comprises the step of defining the power index (POW t ) on the basis of the transmission power of the transmitter (12), and the step of selecting at least one limit value. Said power index (POW t ) is compared with said limit value and, on the basis of the comparison, it is deduced whether there is a need to adjust the transmission power of the wireless communication device (2).

    摘要翻译： 本发明涉及一种用于无线通信设备（2）的功率控制的方法。 该方法包括的步骤中，定义所述无线通信装置（2）中的至少一个发射器（12）的发送功率。 另外，该方法包括以下步骤，定义发射器（12）的发送功率的基础上，幂指数（POWt），并选择至少一个限制值的步骤。 所述功率指数（POWt）与所述限制值，并且在比较的基础上比较时，可以推导出是否有必要调整无线通信设备的发送功率（2）。

    CALIBRATION OF A MOBILE DEVICE USING A LOOPBACK MODULE
    96.
    发明公开
    CALIBRATION OF A MOBILE DEVICE USING A LOOPBACK MODULE 有权
    校准移动站的USING A回送模块

    公开(公告)号：EP1219054A1

    公开(公告)日：2002-07-03

    申请号：EP00963546.7

    申请日：2000-09-14

    申请人： Ericsson Inc.

    发明人： HENRY, Raymond, C., Jr.

    IPC分类号： H04B17/00

    CPC分类号： H04B17/20 ,  H04B17/102 ,  H04B17/14 ,  H04W4/18 ,  H04W28/18 ,  H04W88/02

    摘要： A loopback module includes a plurality of signal paths and is designed to mix an incoming phone signal with a signal from a signal generator to produce a loopback signal at the receive frequency of the phone. The loopback signal is applied to the phone's antenna. The phone then evaluates the loopback signal to determine the appropriate offset for the transmitter chain at that frequency and power level. This process is iterated until the desired number of frequencies and power levels are tested for proper calibration. The offsets are stored in memory for later use by the phone.

    Detecting circuit and detection method
    97.
    发明公开
    Detecting circuit and detection method 失效
    Detektierschaltung und Detektierverfahren。

    公开(公告)号：EP0599665A2

    公开(公告)日：1994-06-01

    申请号：EP93309510.1

    申请日：1993-11-29

    申请人： NEC CORPORATION

    发明人： Hori, Tsuguo, c/o NEC Corporation

    IPC分类号： H04B17/00 ,  H04B15/00 ,  H04B7/212

    CPC分类号： H04B17/18 ,  H04B17/102

    摘要： A high frequency signal detecting circuit capable of smoothing a mean power in each time slot and performing rapid response during transition time. A detector (3) detects the envelope of an radio frequency signal whose power level may change depending on the time slot. A filter (7) narrows the pass band in the data field of each time slot and broadens it in the transition field of the same. The output of the detector (3) is applied to the filter (7). The detecting circuit, therefore, produces an output which is smoothed in the data field without regard to the content of data and which responds to a change in the power level sharply in the transition field.
    An analogous detection method is also disclosed. An analogous detection method is also disclosed.

    摘要翻译： 一种高频信号检测电路，能够平滑每个时隙的平均功率并在转换时间内执行快速响应。 检测器检测其功率电平可能根据时隙而改变的射频信号的包络。 滤波器缩小每个时隙的数据字段中的通带，并在其过渡字段中加宽它。 检测器的输出应用于过滤器。 因此，检测电路产生在数据字段中平滑的输出，而不考虑数据的内容，并且在转换字段中急剧地响应功率电平的变化。 还公开了类似的检测方法。

    CLOSED LOOP APERTURE TUNABLE ANTENNA
    100.
    发明公开
    CLOSED LOOP APERTURE TUNABLE ANTENNA 审中-公开

    公开(公告)号：EP3417511A1

    公开(公告)日：2018-12-26

    申请号：EP17802159.8

    申请日：2017-05-23

    申请人： Huawei Technologies Co., Ltd.

    发明人： SHI, Ping ,  WEI, Yonghua

    IPC分类号： H01Q5/314

    CPC分类号： H01Q1/50 ,  H04B17/102 ,  H04B17/12

    摘要： An apparatus comprises a radio frequency (RF) antenna circuit; an antenna aperture tuning circuit; an antenna impedance measurement circuit; and a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit. The processor circuit is configured to: set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network; initiate an antenna impedance measurement; and change the antenna aperture tuning state to an antenna aperture tuning state indicated by the antenna impedance.