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    • 62. 发明申请
    • Method and apparatus for detecting lock status of a GPS signal
    • 用于检测GPS信号的锁定状态的方法和装置
    • US20080317101A1
    • 2008-12-25
    • US11820807
    • 2007-06-21
    • Xiaoguang YuJianhui HouBo YuHaiquan Huang
    • Xiaoguang YuJianhui HouBo YuHaiquan Huang
    • H04B1/707G01S1/02
    • H04B1/70755G01S19/24H04B2201/70715
    • An apparatus for detecting lock status of a spread spectrum signal, having a first accumulator, a first calculation unit, a second calculation unit, a second accumulator, a multiplier and a comparator. The first accumulator accumulates an in-phase integration result and a quadrature integration result over a time period. The first calculation unit determines a first evaluation value based on the accumulated in-phase integration result and the accumulated quadrature integration result. The second calculation unit processes the in-phase integration result and the quadrature integration result. The second accumulator accumulates the output of the second calculation unit over the time period. The multiplier determines a second evaluation value by multiplying the accumulated result from the second accumulator with a predetermined value. The comparator compares the first and second evaluation results wherein the comparison result is an indicator of the lock status.
    • 一种用于检测扩频信号的锁定状态的装置,具有第一累加器,第一计算单元,第二计算单元,第二累加器,乘法器和比较器。 第一个累加器在一段时间内积累同相积分结果和正交积分结果。 第一计算单元基于累积的同相积分结果和积分正交积分结果来确定第一评估值。 第二计算单元处理同相积分结果和正交积分结果。 第二累加器在该时间段内积累第二计算单元的输出。 乘法器通过将来自第二累加器的累加结果乘以预定值来确定第二评估值。 比较器比较第一和第二评估结果,其中比较结果是锁定状态的指标。