会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Method for frequency locking onto a pilot reference signal affected by
multipath fading
    • 频率锁定到受多径衰落影响的导频参考信号的方法
    • US5678215A
    • 1997-10-14
    • US664077
    • 1996-06-13
    • Stephen R. Carsello
    • Stephen R. Carsello
    • H03J1/00H03J7/04H04B1/10H04B1/16
    • H03J7/04H03J1/0008H04B1/1081
    • A radio receiver (700) uses automatic frequency control for locking a controlled reference signal (108) to a pilot reference signal (114) that has been distorted by multipath fading. The radio receiver (700) is programmed to sample the pilot reference signal (114) over a predetermined time interval to determine an average pilot frequency, and applies a first weighting function to the average pilot frequency to generate a weighted pilot frequency and a second weighting function to a controlled frequency of the controlled reference signal (108) to generate a weighted controlled frequency. The radio receiver (700) sums the weighted pilot frequency with the weighted controlled frequency to provide an update frequency, and modifies the controlled reference signal (108) such that its frequency matches the update frequency. The radio receiver (700) continues these programmed steps so as to lock the controlled reference signal (108) to the pilot reference signal (114).
    • 无线电接收机(700)使用自动频率控制来将受控参考信号(108)锁定到已被多径衰落变形的导频参考信号(114)。 无线电接收机(700)被编程为在预定时间间隔内对导频参考信号(114)进行采样以确定平均导频,并将第一加权函数应用于平均导频,以产生加权导频和第二加权 对受控参考信号(108)的受控频率起作用以产生加权的受控频率。 无线电接收机(700)将加权的导频频率与加权的受控频率相加以提供更新频率,并且修改受控参考信号(108)使得其频率与更新频率匹配。 无线电接收机(700)继续这些编程步骤,以便将受控参考信号(108)锁定到导频参考信号(114)。
    • 4. 发明授权
    • Selective call receiving device with improved symbol decoding and
automatic frequency control
    • 具有改进符号解码和自动频率控制的选择性呼叫接收装置
    • US5566213A
    • 1996-10-15
    • US401467
    • 1995-03-09
    • Stephen R. Carsello
    • Stephen R. Carsello
    • H04L7/02H04L7/10H04L25/06H04W88/02H03L7/00H04B1/06H04L7/00
    • H04L7/0062H04L25/061H04L7/10H04W88/026
    • A selective call receiving device (10) includes a signal decoder that utilizes both a peak and valley routine and a stochastic gradient feedback route for processing a received signal. The peak and valley routine is operable prior to the detection of a predetermined synchronization word in the received signal to detect the peak and valley of a received signal and to generated based on detected peak and valley, a DC offset correction value for correcting the received signal prior to symbol decoding. A number of threshold values are also generated based on the detected peak and valley of the signal for use by a symbol decoder (77). The symbol decoder (77) utilizes the threshold values for decoding a signal into symbols. The symbol decoder (77) also generates a feedback error that is used after the detection of the predetermined synchronization word for updating the DC correction value and for generating a gain correction value. An automatic frequency control signal is generated based on the DC correction value and a signal quality metric derived from the feedback error.
    • 选择呼叫接收装置(10)包括利用峰值和谷值程序的信号解码器以及用于处理接收信号的随机梯度反馈路由。 峰值和谷值程序在接收信号中检测到预定同步字之前可操作以检测接收信号的峰值和谷值并且基于检测到的峰值和谷值产生,用于校正接收信号的DC偏移校正值 在符号解码之前。 还基于由符号解码器(77)使用的信号的检测到的峰谷来生成多个阈值。 符号解码器(77)利用阈值将信号解码成符号。 符号解码器(77)还产生在检测到用于更新DC校正值并用于产生增益校正值的预定同步字之后使用的反馈误差。 基于DC校正值和从反馈误差导出的信号质量度量生成自动频率控制信号。