Sampling Pulses for Optimal Timing
Sampling Pulses for Optimal Timing
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DOI：
10.1109/tns.2007.892692
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发表时间：
2005-12
影响因子：
1.8
通讯作者：
A. Bousselham;C. Bohm
中科院分区：
文献类型：
--
作者：
A. Bousselham;C. Bohm
当从采样数据中提取未知带限脉冲时，奈奎斯特准则定义了最小采样频率。有了明确的脉冲形状和固定的噪声环境，可以使用匹配的滤波器来恢复时间和幅度，但闪烁检测器通常不是这种情况。如果噪声不稳定，则必须使用其他方法。我们的研究探讨了不同的定时策略，以及定时精度如何取决于ADC分辨率和采样率。它还将时序精度与模拟装置获得的数据进行了比较。实验研究了光电倍增管读出LSO晶体的脉冲。在这种情况下，我们的最佳方法与匹配的滤波器方法相比，在时序上提高了10%。本文还报道了一些仿真结果
When extracting unknown band-limited pulses from sampled data, the Nyquist criterion defines the minimum sampling frequency. With well-defined pulse shapes and a stationary noise environment one can use matched filters to recover time and amplitude, but this is usually not the case with scintillation detectors. If the noise is not stationary other methods must be used. Our study investigates different timing strategies and how the timing precision depends on ADC resolution and sample rate. It also compares the timing precision with data obtained from an analogue setup. Pulses from an LSO crystal with photomultiplier readout are studied experimentally. Our best method gives in this case a 10% improvement in timing compared to a matched filter approach. Some simulation results are also reported