| 1. | Performance comparison between noise signal and chirp signal in correlation measurement
相关法测量中的噪声信号源和扫频信号源的性能比较 |
| 2. | In order to obtain high range resolution , the chirp signal is used as subpulse to form stepped frequency modulated radar signal
摘要为了获得高距离分辨率，将线性调频信号作为子脉冲构成调频步进雷达信号。 |
| 3. | Chirp - subpulse stepped frequency signal is one of the high distance resolution signals with merits of stepped - frequency signal and chirp signal
Chirp子脉冲频率步进信号兼有频率步进信号和线性调频信号的优点,是一种高距离分辨力信号。 |
| 4. | By combining the chirpogram and the mean likelihood estimation with mrkov chain monte carlo technique , it is shown that accurate estimates can be obtained for chirp signals
此方法将均值似然估计和调频图应用于mcmc中,避免了极大似然估计中的积分运算和多维搜索,减少了计算量。 |
| 5. | Chirp signal is a kind of pulse - compressed signal with large time - bandwidth products achieved through linear frequency modulation . it has high resolution in range because of its great bandwidth
线性调频信号是通过线性频率调制获得大的时宽带宽积的一种脉冲压缩信号，具有大的带宽，因此有高的距离分辨力。 |
| 6. | ( 5 ) based on subspace orthogonal algorithm , a method for estimating the parameters of wide - band chirp signal is studied . it is shown that accurate estimation can be obtained for wide - band chirp signal even under low signal - to - noise ratio ( snr )
( 6 )基于dft原理和fft技术,提出了适用于非高斯噪声环境的线性调频参数估计的快速离散chirp傅立叶变换( dcft )算法。 |
| 7. | For multicomponent chirp signals with unbalanced amplitudes , an iterative algorithm combined with the paf is proposed to suppress the error propagation effect and residual signal in the peeling - off procedure . the corresponding time - frequency distribution for unbalanced signals is derived
针对多分量强弱信号,引入基于逐次减小误差的迭代算法,导出了能够减小强弱信号相互影响的核函数设计方法,从而有效抑制误差传播和残余信号。 |
| 8. | First of all , by establishing the observation model of complex harmonic signal and complex linear chirp signal respectively under the co - jamming of additive and multiply noise , the paper constructed cyclic moment detectors of different orders , deduced snr expression of the detector through theoretic analysis , discussed the relation of detector performance and noise statistical characteristic . the curve of detection performance is obtained through monte carlo simulation test , proving the related conclusion derived
首先，论文分别以加性和乘性噪声联合干扰下的复谐波信号和复线性调频信号为观测模型，构造了基于不同阶次的循环矩检测统计量，从理论上推导出了检测器的信噪比表达式，分析了检测器性能与噪声统计特性的关系，通过monte - carlo仿真试验得到了检测性能的曲线，验证了推导的有关结论。 |
| 9. | Two detection methods of chirp signals are presented in the dissertation : the cyclic autocorrelation detection method and the correlation detection method of cyclic autocorrelation function . it is shown that the two methods both have an excellent performance of blind detection . the performance analyses of the two detection methods are both carried out for additive noise or multiplicative noise , and the output signal - to - noise ratio ( snr ) expressions of the two methods are also derived
通过研究提出了两种线性调频信号的检测方法?基于循环自相关函数包络的检测方法和基于循环自相关函数的相关函数包络的检测方法，两种方法均可实现信号的盲检测，有良好的检测性能，文中还分析了加性噪声及存在乘性和加性噪声情况下两种检测方法的性能，推导出了输出信噪比公式。 |
| 10. | The cyclic estimation approaches of chirp signals in additive nose or multiplicative noise are proposed , it presents a way for the parameters estimation of zero mean amplitude chirp signals . the estimation performances in the additive noise or multiplicative noise are analyzed by the first order perturbation analysis method , and the error variance expressions of the parameters estimation under large samples are derived
针对加性噪声情况及存在乘性噪声的情况，提出了线性调频信号参数的循环平稳估计方法，解决了零均值乘性噪声的信号参数估计问题，并采用一阶扰动分析方法，对两种噪声情况下的估计性能进行了分析，推导出了各参数的估计误差方差公式。 |
