On the basis of the introduction of AGC, a further improvement of the previous UWB indoor positioning receiver is made based on non-correlation detection ultra-wideband positioning receiver. Meanwhile the phase-locked loop is redesigned and implemented. Using the charge pump-type Analog-Digital Mixed phase-locked loop receiver, the UWB pulse signal's arrival time (TOA) is exactly estimated, to realize precise distance measurement in indoor environment, so as to accurately position. The reliability of this program is demonstrated by means of hardware implementation and experiments, which has good effects on the improvement of positioning precision.%基于超宽带非相关检测的定位接收机,在引入AGC的基础上,对以往的脉冲超宽带室内定位接收机做进一步改进,重新对锁相环进行设计与实现.采用电荷泵式模数混合锁相环接收机对UWB脉冲信号到达时间(TOA)进行准确估计,实现室内环境精确测距,以达到准确定位的目的.通过硬件实现和实验论证了该方案的可靠性,对定位精度的提高具有良好的效果.
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