| SAW相关器与扩频同步信号的时间估计 |
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| 引用本文： | 车仁泉,许宗泽.SAW相关器与扩频同步信号的时间估计[J].南京航空航天大学学报,1996,28(1):126-131. |
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| 作者姓名： | 车仁泉 许宗泽 |
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| 作者单位： | 南京航空航天大学电子工程系 |
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| 摘 要： | 给出两种ＳＡＷ器件：存贮式和双输入式ＳＡＷ相关卷积器，并分析它们作为解扩器件对同步信号到达时刻的估计精度。同步问题是对同步信号的检测和对信号到达时刻的估计。当扩频同步信号被检测到且满足（τ为码元宽度）时，同步信号被捕获（即达到了粗同步）。通过对两种器件时间估计精度的分析可以看出，在相同的检测概率下，双输入式ＳＡＷ相关卷积器的估计精度比存贮式的高。最后利用双输入式ＳＡＷ相关卷积器对信号时间轴压缩的性质进一步提高了估计精度。
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| 关 键 词： | 扩频通信 信号检测 参量估计 卷积 相关 |
SAW Correlator and Estimation of Epoch of Synchronous Spread Spectrum Signal |
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| Che Renquan, Xu Zongze.SAW Correlator and Estimation of Epoch of Synchronous Spread Spectrum Signal[J].Journal of Nanjing University of Aeronautics & Astronautics,1996,28(1):126-131. |
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| Authors: | Che Renquan Xu Zongze |
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| Abstract: | Presents two kinds of SAW (surface acoustic wave) devieces:the storing and thedual-inputting SAW correlators, an.d analyzes the mean (accuracy) and variance(precision) ofthe estimator. The correlators are used as time estimators. As it is known, synchronization isused not only to detect the synchronous signal,but also to determine its time of arrival. Whenthe spread spectrum signal is detected and it--i'I
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| Keywords: | spread spectrum communication signal detection parametric estimation convolution correlation |
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