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    • 3. 发明公开
    • 공통 기준 크리스탈 시스템들
    • 通用参考晶体系统
    • KR1020130136410A
    • 2013-12-12
    • KR1020130064172
    • 2013-06-04
    • 브로드콤 코포레이션
    • 허,롱
    • H04L25/38H03B5/32
    • H03L1/022G01S19/235G01S19/37
    • One embodiment of a communication system includes: a crystal generator outputting a reference clock; cellular radio frequency and baseband phase fix loops receiving the reference clock in a cellular module and compensating frequency errors calculated between a cellular local oscillator signal and a cellular downlink signal received during the operation of the cellular module; a global positioning system (GPS) frequency compensation circuit receiving the reference clock in a GPS module and compensating frequency errors during the operation of the GPS module; a plurality of sensing resistances; and a temperature-sensing circuit outputting a signal corresponding to the temperature of a reference crystal changing due to a frequency deviation; wherein the GPS frequency compensation circuit offsets the frequency deviation to meet GPS clock frequency conditions and outputs temperature-compensated signal. [Reference numerals] (103) XO core;(104) Cellular RF;(106) Cellular BB;(108) GPS system;(122) Temperature-sensing circuit;(123) Voltage-temperature model T (R_NTC);(124) Chrystal temperature-frequency model f_error (T);(AA,BB,FF) Buffer;(CC) Channel processing;(DD) All BB clocks;(EE) Reference clock from cellular;(GG) Obataining/tracking;(HH) Temperature-frequency self running;(II) Thermistor parameters;(JJ) Sensing circuit parameters;(KK) Calculation data;(LL) Temperature-frequency parameters;(MM) Obtaining/tracking high level SW
    • 通信系统的一个实施例包括:输出参考时钟的晶体发生器; 在蜂窝模块中接收参考时钟的蜂窝射频和基带相位固定环路,并且补偿在蜂窝本地振荡器信号与蜂窝模块操作期间接收的蜂窝下行链路信号之间计算的频率误差; 全球定位系统(GPS)频率补偿电路,在GPS模块中接收参考时钟,并且在GPS模块的操作期间补偿频率误差; 多个感测电阻; 以及温度检测电路,输出与由于频率偏差而改变的参考晶体的温度相对应的信号; 其中GPS频率补偿电路抵消频率偏差以满足GPS时钟频率条件并输出温度补偿信号。 (103)XO芯;(104)蜂窝RF;(106)蜂窝BB;(108)GPS系统;(122)温度感测电路;(123)电压 - 温度模型T(R_NTC);(124 )晶体温度频率模型f_error(T);(AA,BB,FF)缓冲器;(CC)通道处理;(DD)所有BB时钟;(EE)来自蜂窝的参考时钟;(GG)产生/跟踪;(HH )温度频率自运行;(II)热敏电阻参数;(JJ)感应电路参数;(KK)计算数据;(LL)温度 - 频率参数;(MM)获取/跟踪高电平SW
    • 10. 发明公开
    • 무선항법 신호 처리방법
    • 处理放射性信号的方法
    • KR1020090127425A
    • 2009-12-11
    • KR1020097021755
    • 2008-03-28
    • 쌍트르 나쇼날 데튜드 스파씨알르 (쎄 엔 어 에스)
    • 로리치스,데니스메르시에,훌라비앙
    • G01S5/14G01S1/00
    • G01S19/44G01S19/235
    • The satellites of a constellation of satellites each transmit, on distinct frequencies, a first and a second radionavigation signal, respectively. Each station of a reference network from which a satellite is visible performs non-differentiated measurements of code and phase for each of the two signals originating from the satellite and deduces therefrom a raw value of the widelane ambiguity. An internal delay of the satellite and a whole value of the widelane ambiguity are determined, in the network, on the basis of this raw value. The method comprises the steps:-receiving the first and second radionavigation signals at the level of the reference receiver;-performing, with the aid of the reference receiver and for each of the first and second signals received, a non-differentiated measurement of code and a non-differentiated measurement of phase;-calculating the raw value of the widelane ambiguity on the basis of the non-differentiated measurements of code and phase; and-fixing the internal delay of the satellite and the whole value of the widelane ambiguity on the basis of the raw value for the reference receiver.
    • 卫星星座的卫星分别以不同的频率发射第一和第二无线电导航信号。 卫星可见的参考网络的每个站对来自卫星的两个信号中的每个信号执行码和相位的非差分测量,并从其推导出wid夫模糊度的原始值。 在网络中,根据该原始值确定卫星的内部延迟和宽带模糊度的整体值。 该方法包括以下步骤: - 在参考接收机的电平处接收第一和第二无线电导航信号; - 在参考接收机的帮助下执行,并且对于所接收的第一和第二信号中的每一个,执行码的非差分测量 和相位的非差分测量; - 基于代码和相位的非差分测量来计算宽带模糊度的原始值; 并根据参考接收机的原始值固定卫星的内部延迟和宽带模糊度的整体值。