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    • 4. 发明授权
    • 멀티-비트상관기를구비한확산스펙트럼수신기
    • 멀티 - 비트상관기를구비한확산스펙트럼수신기
    • KR100459834B1
    • 2005-01-31
    • KR1019980708604
    • 1997-04-25
    • 씨에스알 테크놀로지 인크.
    • 콜리산자이첸스티븐칸챨스알.챈사카맹기쉬트레츠키그레그
    • G01S5/14
    • H04B1/7085G01C21/26G01C22/00G01S19/11G01S19/22G01S19/235G01S19/29G01S19/30G01S19/34G01S19/37G01S19/47H04B1/709H04B7/216
    • A terrestrial C/A code GPS receiver system digitally samples, filters and stores a segment of 11 half chips of the received composite as a binary number and multiplexes this number for parallel correlation with each of a series of multibit code replicas for the satellites to be tracked. Each of the time delay specific correlation products are accumulated in a cell of a memory matrix so that at least twenty-two delays for each satellite may be evaluated each code period providing fast reacquisition even within a city intersection, as well as correction of multipath tracking and multipath interference. All cells of the memory matrix may be used for an acquisition of a single satellite in about 4 ms. Two satellite tracking, in addition to altitude hold, uses cross-track hold alternating with clock hold to update the cross-track estimate. Single satellite tracking uses cross-track and clock hold together. Navigation data is updated with detected changes in motion including turns.
    • 地面C / ​​A码GPS接收机系统以数字方式采样,滤波和存储所接收合成的11个半码片的一部分作为二进制数,并复用这个数目以便与用于卫星的一系列多比特码复制品中的每一个进行平行相关 跟踪。 每个时间延迟特定的相关积被存储在存储矩阵的一个单元中,从而可以评估每个卫星的至少二十二个延迟,每个代码周期甚至在城市交叉口内提供快速重新获取,以及校正多径跟踪 和多路径干扰。 存储器矩阵的所有单元可以用于在大约4ms内获取单个卫星。 除了高度保持之外,还有两个卫星跟踪使用交叉跟踪保持和时钟保持交替来更新交叉跟踪估计。 单一卫星跟踪使用交叉跟踪和时钟保持在一起。 导航数据更新为检测到的运动变化,包括转弯。
    • 9. 发明公开
    • 범용 디지털 인터페이스를 갖춘 GPS 프론트엔드
    • GPS前端与通用数字接口
    • KR1020080035665A
    • 2008-04-23
    • KR1020087004960
    • 2006-05-09
    • 씨에스알 테크놀로지 인크.
    • 앤더슨,에릭바비츠,다니엘하세미,마지드
    • G01S5/14
    • H04B1/28G01S19/37H04L2027/0053
    • A radio frequency integrated circuit for a global positioning system (GPS) application mixes radio frequency GPS signals from an external source with a predetermined intermediate frequency that is less than 4fo. In one embodiment, the intermediate frequency is selected to be 1.5fo. An intermediate frequency filter then band-limits the intermediate frequency GPS signals, rolling off at a frequency in the vicinity of 2.5 MHz to achieve substantial attenuation at 3.5-4.0 MHz. An automatic gain control circuit amplifies the filtered intermediate frequency GPS signals to proper voltage levels. The amplified intermediate frequency GPS signals is then digitized by an analog-to-digital converter at a predetermined sampling rate more than twice the intermediate frequency to provide samples of a predetermined number of bits, which are then provided for base band processing by a general purpose microprocessor over an industry-standard serial bus.
    • 用于全球定位系统(GPS)应用的射频集成电路将来自外部源的射频GPS信号与小于4fo的预定中间频率混合。 在一个实施例中,中频被选择为1.5fo。 然后,中频滤波器对中频GPS信号进行频带限制,以2.5MHz附近的频率滚动,以实现3.5-4.0MHz的实质衰减。 自动增益控制电路将滤波的中频GPS信号放大到适当的电压电平。 然后,放大的中频GPS信号以大于中频两倍的预定采样率由模数转换器数字化,以提供预定位数的样本,然后通过通用目的提供基带处理 微处理器通过行业标准的串行总线。