查询词典 chirp

It is shown that many of the existing integral transforms (including their logically equivalents) such as chirplet transform, dispersion transform, wavelet transform, chirp-Fourier transform, short-time Fourier transform, Gabor transform, Fourier transform, cosine transform, sine transform, Hartley transform, Laplace transform, z transform, Mellin transform, Hilbert transform, autocorrelation function, cross-correlation function, and the energy and mean of a signal, can each be considered as a special case of the FMmlet transform with specific parameters. In fact, an inventory of subspaces of FMmlet transform runs into countless numbers. The subspaces mentioned above are merely a few among a zoo of subspaces. They are essentially obtained by cutting the transform space of FMmlet transform at different positions, and can be likened to the computed tomography in medical diagnosis. Through these subspaces we actually see different slices or profiles of the FMmlet transform.

将现有诸多变换置于统一的 FMmlet 变换中加以审视，发现 chirplet 变换、频散变换、小波变换、 chirp-Fourier 变换、短时 Fourier 变换、 Gabor 变换、 Fourier 变换、余弦变换、正弦变换、 Hartley 变换、 Laplace 变换、变换、 Mellin 变换、 Hilbert 变换、自相关函数、互相关函数、能量和均值等，均为 FMmlet 变换在其参数取特定值时的特例；上述诸变换之间的差别，主要在于变换空间的维数有别，以及在不同空间维上取值的不同；这些变换有如医学诊断中的 CT，均由压缩 FMmlet 变换域空间所致，可以说我们通过这些变换看到的，是 FMmlet 变换的不同剖面。

Moreover, by employing the product technique, based on the generalized Chirp-like sequence set, two new classes of approximately optimal polyphase sequences with zero correlation zone can be easily generated.

此外，利用序列乘积的技巧，基于广义Chirp-like序列族，本文得到了两类新型实现简单的渐进最佳多相零相关区扩频序列。

The method applied in this paper uses the identic sequence instead of chirp sequence.

与以往采用chirp序列作为训练信号的方法不同，该文采用全序列作为训练信号。

When the power of phase polynomial is one or two respectively, periodogram and chirp Fourier transform method are the corresponding optimal detection methods.

在相位多项式次数分别为1或2时，周期图、chirp傅里叶变换检测即为对应的最优检测器。

In order to improve the frequency resolution, realize high precision frequency estimation, this thesis proposes the high resolution polynomial Wigner-Ville distribution using Chirp-Z transform, the validity of this algorithm is verified using synthesized data.

为了提高基于FFT的谱分析算法的分辨率，实现高精度的频率估计，提出了利用Chirp-Z变换的频率高分辨多项式Wigner-ville分布，并用合成的仿真数据，验证了上述算法的有效性和正确性。

Chirp Z transform based imaging algorithm, an important frequency domain algorithm for synthetic aperture radar, was studied in this paper.

基于Chirp Z变换的合成孔径雷达成像算法是一种重要的频域类成像算法，文中对该算法进行了研究。

Seismic response to conventional Chirp sweeping vibrator signal has the shortcomings of high side lobs and low resolution.

常规的可控震源Chirp扫描信号的地震响应存在着相关信号旁瓣大、分辨率低的缺点。

A kind of GCL(Generalized chirp-like) sequences are adopted as the preambles of the random access channel, and a cyclic postfix is added. This structure can utilize the perfect periodic correlation properties of GCL sequences effectively to improve the detection performance.

采用具有GCL(General chirp-like)序列作为随机接入信道的前导码，并加上了循环后缀，该结构能够有效利用GCL序列良好的周期相关特性提高检测性能。

A new pseudo Wigner distribution in the Fractional Fourier transform domain is proposed to analyze single or multi-component chirp signals.

提出了一种新的基于分数阶傅里叶变换的伪维格纳分布，用于单分量或多分量chirp信号的分析。

Time-frequency analysis ; fractional Fourier transform ; pseudo Wigner distribution; chirp signal ; short-time Fourier transform

时频分析；分数阶傅里叶变换；伪维格纳分布； chirp信号；短时傅里叶变换

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。