| 1. | The detection of weak sinusoidal signal by multi - layer auto correlation
用多重自相关法检测微弱正弦信号 |
| 2. | Weak sinusoidal signal frequency detection via the array of duffing oscillators
杜芬振子阵列实现弱正弦信号频率检测 |
| 3. | Sinusoidal signal generator
正弦信号发生器 |
| 4. | Three characteristics that discribe a sinusoidal signal are the frequency , amplitude , and initial angle
表示正弦量的三个要素为频率、幅值（大小）和初相角。 |
| 5. | ( 4 ) periodicity and pseudo - modulation when sampling sinusoidal signals the periodicity and pseudo - modulation due to non - integral sampling of sinusoidal signal are analyzed
着重讨论连续信号采样过程中抽样定理对正弦信号的非整数抽样序列的周期性，伪调制性和调制周期的周期性。 |
| 6. | ( 4 ) a method , realizing the fast frequency measurement for dual sinusoidal signals basing on dft and autocorrelation theory , is proposed . firstly , one frequency and its amplitude are measured by dft , with which to demodulate the signals and eliminate the
该方法先用dft估计其中一个信号的频率和幅度,以此频率对信号解调并对消该频率成分,最后利用自相关理论估计出另一个信号的频率。 |
| 7. | The slope signal analyses and sinusoidal signal analyses show that the dnl 1 / 2lsb , at 49 . 902 mhz input frequency and 100mhz sampling frequency , sfdr is 75 . 5db and the or output can detect correctly whether the input signal is overflow and the system has good linearity
输入频率为49 . 902mhz的满幅( 500mv )正弦信号,测得adc的无杂散动态范围( sfdr )为75 . 5db ,系统的具有良好的线性度。 |
| 8. | Based on the theories described above , calculation formula of general dimension of least square measure and multi - fractal fault diagnosis and analysis system have been established with borland c + + builder 5 . 0 , and checked by pure sinusoidal and cosine signal and sinusoidal signal with noise , and verified by the examples
基于上述原理，建立了最小二乘法的广义维数计算公式，用borlandc + + builder5 . 0编制了以广义维数计算分析为基础的多重分形故障诊断系统，并对标准的正弦信号、余弦信号及带有噪声的正弦信号进行了验证。 |
| 9. | Based on classification of general jamming signal , generalizing them and analyzing their performance , the effectiveness of the pressing jamming and interference is deeply studied . the optimal jamming bandwidth of the wideband white noise and the optimal jamming frequency of the single sinusoidal signal are deduced by theoretical analysis and detailed derivation
在对常用干扰方式进行分类、概括性总结及特点分析的基础上,深入研究了直扩通信系统压制式干扰效能,并通过理论分析和详细推证,得到了宽带噪声信号最佳干扰带宽和单频信号最佳干扰频率。 |
