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204 条记录 (耗时 0.022 秒)

    Improved receiver including a wideband digitizer
    2.
    发明授权
    Improved receiver including a wideband digitizer 有权
    VerbesserterEmpfängerumfassend einen Breitbanddigitalisierer

    公开(公告)号：EP1131974B1

    公开(公告)日：2008-02-20

    申请号：EP99958974.0

    申请日：1999-11-16

    申请人： Ericsson Inc.

    发明人： DENT, Paul, W.

    IPC分类号： H04Q7/38

    CPC分类号： H04W48/16 ,  H04W48/20 ,  Y02D70/1222

    摘要： A device and method is provided that transmits a monitor report to the current base station concurrently with the transmission of the informational content carrying signals by embedding the monitor report in the informational content carrying signals. The current base station uses the monitor report to initiate transfer of service for the mobile communication device to the base station with the strongest carrier signal strength by sending appropriate signals to the mobile switching center that in turn signals the base station to take over service for the mobile communication device. A wideband digitizing circuit obtains amplified wideband analog signals from the receiver before channel filtering and demodulation, and converts them to complex digital samples. The digital samples are obtained at a rate greater than the Nyquist rate for the total scanned bandwidth but are only taken during a very short time interval commensurate with the reciprocal of the channel spacing, thereby reducing power consumption to a minimum. The digital samples are then operated on by a microprocessor or signal processor to determine energy in a plurality of channels, preferably using a fast Fourier transform. The analysis results in an indication of the channels containing the strongest signals and this information is provided in the monitor report sent to the current base station.

    摘要翻译： 提供了一种装置和方法，其通过将监视报告嵌入到信息内容携带信号中，与传送信息内容携带信号同时发送到当前基站。 当前的基站使用监视报告，通过向移动交换中心发送适当的信号，以最强的载波信号强度来启动移动通信设备向基站的业务传输，而移动交换中心又向基站发信号接收服务 移动通信设备。 宽带数字化电路在信道滤波和解调之前从接收机获得放大的宽带模拟信号，并将其转换为复数数字样本。 数字样本以大于奈奎斯特速率的速率获得，对于总扫描带宽，仅在与信道间隔的倒数相当的非常短的时间间隔内进行，从而将功耗降至最低。 然后，数字样本由微处理器或信号处理器操作，以确定多个通道中的能量，优选地使用快速傅里叶变换。 分析结果显示包含最强信号的信道，并且该信息在发送到当前基站的监视报告中提供。

    A SIMPLIFIED DIGITAL FIR FILTER FOR DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATION SYSTEMS
    3.
    发明授权
    A SIMPLIFIED DIGITAL FIR FILTER FOR DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATION SYSTEMS 有权
    简化FIR数字滤波器直接SEQUENZSPREIZSPEKTRUMÜBERTRAGUNGSSYSTEME

    公开(公告)号：EP1221198B1

    公开(公告)日：2006-04-05

    申请号：EP00966796.5

    申请日：2000-09-22

    申请人： Ericsson Inc.

    发明人： DENT, Paul, W. ,  BARROW, David

    IPC分类号： H03H17/06

    CPC分类号： H03H17/0607

    摘要： A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of time-reversal symmetry of the responses. Moreover, the disclosed signal generator supports up-ramping and down-ramping for smooth transmission of spread spectrum modulated signals.

    INTERSTITIAL SECTOR SYSTEM
    4.
    发明授权
    INTERSTITIAL SECTOR SYSTEM 失效
    INTERSTITIAL扇区设置

    公开(公告)号：EP0934667B1

    公开(公告)日：2005-08-03

    申请号：EP97910000.5

    申请日：1997-10-07

    申请人： Ericsson Inc.

    发明人： DENT, Paul, W.

    IPC分类号： H04Q7/36 ,  H04Q7/22

    CPC分类号： H04W16/12 ,  H01Q1/246 ,  H01Q25/00 ,  H04W16/02 ,  H04W16/24 ,  H04W16/28 ,  Y02D70/00 ,  Y02D70/1222

    摘要： A method and apparatus for improving the reception characteristics for lower-power portable telephone units at a base station site (8) is disclosed. A normal three-sector antenna site (8) is divided into a plurality of sectors each having a central line of focus. The frequency channels assigned to the base station site (8) are divided among the sectors, and an antenna (10) within each sector radiates the assigned frequencies along the central line of focus for each of the sectors.

    POWER AMPLIFIER CONTROL
    7.
    发明公开
    POWER AMPLIFIER CONTROL 有权
    功率放大器控制

    公开(公告)号：EP1451926A2

    公开(公告)日：2004-09-01

    申请号：EP02737201.0

    申请日：2002-05-29

    申请人： Ericsson Inc.

    发明人： DENT, Paul, W. ,  PEHLKE, David, R. ,  HADJICHRISTOS, Aristotle

    IPC分类号： H03F3/20

    CPC分类号： H03F1/0222 ,  H03F2200/331 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2200/504

    摘要： Methods and systems for amplitude-modulating a power amplifier based on sensed current and sensed voltage provided to the power amplifier are provided. The sensed current and sensed voltage may be summed to provided both current and voltage feedback to modulate the power supplied to the power amplifier. Alternatively, both the current feedback and the voltage feedback may be selectively utilized to modulate the power supplied to the power amplifier.

    摘要翻译： 提供了用于基于提供给功率放大器的感测电流和感测电压来幅度调制功率放大器的方法和系统。 感测到的电流和感测电压可以相加以提供电流和电压反馈以调制供应给功率放大器的功率。 或者，可以选择性地利用电流反馈和电压反馈来调制提供给功率放大器的功率。

    ANTENNA COUPLING SYSTEMS AND METHODS FOR TRANSMITTERS
    9.
    发明授权
    ANTENNA COUPLING SYSTEMS AND METHODS FOR TRANSMITTERS 有权
    天线耦合系统和方法SENDER

    公开(公告)号：EP1240686B1

    公开(公告)日：2003-10-29

    申请号：EP00991914.3

    申请日：2000-11-01

    申请人： Ericsson Inc.

    发明人： DENT, Paul, W.

    IPC分类号： H01Q5/00

    CPC分类号： H04B1/0458 ,  H01Q5/50 ,  H03F1/0294

    摘要： Multiple radio channel frequency signals that are modulated with respective information modulation are transmitted from a common antenna at multiple radio frequencies. Multiple modulators are provided, a respective one of which corresponds to a respective one of the radio channel frequencies. Each modulator generates at least one constant amplitude, phase modulated drive signal at the corresponding radio channel frequency from the respective information modulation, such that the at least one constant amplitude, phase modulated drive signal corresponds to the information modulation for the corresponding radio frequency. At least one saturated power amplifier is provided for each of the at least one constant amplitude, phase modulated drive signals. A respective saturated power amplifier is responsive to the corresponding constant amplitude, phase modulated drive signal, to produce a corresponding amplified output signal at an output thereof. A coupling network connects the outputs of the saturated power amplifiers in series, to produce a combined signal that is applied to the common antenna, such that the common antenna radiates the radio channel frequency signals that are modulated with the respective information modulation. In first embodiments, the at least one constant amplitude, phase modulated drive signal is a single constant envelope modulation drive signal, wherein the information modulation is a constant envelope information modulation. In other embodiments, at least two constant amplitude phase modulated drive signals are provided at the corresponding radio channel frequency, such that the at least two constant amplitude, phase modulated drive signals correspond to the information modulation for the corresponding radio frequency.