| 循环平稳特性检测频域设计及信噪比估计研究 |
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| 引用本文： | 刘帅,谭学治,张南.循环平稳特性检测频域设计及信噪比估计研究[J].电子技术应用,2010,36(2). |
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| 作者姓名： | 刘帅 谭学治 张南 |
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| 作者单位： | 哈尔滨工业大学通信技术研究所,黑龙江,哈尔滨,150080 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对现有的循环平稳特征检测时域设计法计算周期较长、系统比较复杂且实时性不高等不足,根据离散傅里叶变换的特性提出了一种循环平稳特征检测频域设计方法。此方法检测性能和时域设计方法相当,但却有效地降低了计算量,提高了系统的实时性,还能够节省存储单元。同时分别在能量检测和循环平稳特性检测中利用多次独立检测所得的方差与信噪比之间的近似线性关系,通过最小二乘法对所得数据进行分析,对未知信噪比进行了有效的估计,从而可以根据信噪比选择合适的信号检测方法。
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| 关 键 词： | 循环平稳特征检测 频谱感知 频域设计法 信噪比估计 |
Frequency domain design of cyclic stationary characteristic detection and SNR estimation |
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| LIU Shuai,TAN Xue Zhi,ZHANG Nan.Frequency domain design of cyclic stationary characteristic detection and SNR estimation[J].Application of Electronic Technique,2010,36(2). |
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| Authors: | LIU Shuai TAN Xue Zhi ZHANG Nan |
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| Affiliation: | LIU Shuai,TAN Xue Zhi,ZHANG Nan(Communication Research Center,Harbin Institute of Technology,Harbin 150080,China) |
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| Abstract: | As the time domain design of cyclic stationary characteristic detection has a longer calculation cycle,more complex system and a lower real time performance,according to the characteristics of discrete fourier transform(DFT),we proposed a frequency domain design of cyclic stationary characteristic detection.This method has the same performance as that of the time domain design,but it reduces the computation efficiently,improves the system real time performance and needs less memory equipments.In addition,us... |
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| Keywords: | cyclic stationary characteristic detection spectrum sensing frequency domain design SNR estimation |
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