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    • 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。
    • 10. 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。