然而,对于微小(≤2cm)肝脏局灶性病变(Focal Liver Lesions,FLLs),灰阶超声及彩色多普勒超声对其检出率及鉴别诊断正确率远不及2cm的FLLs,螺旋CT和MRI对微小F...
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In the scheme, A 2D capture method was applied to capture both the Doppler frequency and Doppler variety rate of downlink signal in parallel mood. A 2-rank FLL associate with 3-rank PLL mode to track carrier is presented.
采用二维捕获方案,并行捕获下行信号的多普勒频率和多普勒频率变化率;利用二阶锁频环和三阶锁相环联合工作方式进行载波跟踪。
参考来源 - 深空通信中微弱信号接收检测方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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