Contrasted with the methods in time space domain, this one has high computation efficiency and is prone to image, because all its computation is in frequency space domain.
当在频率-空间域进行计算时，相对于纯粹的时间-空间域有限差分算法有计算效率高、成像方便的优点。
The utilization rate of licensed spectrum is very low in the time domain, frequency domain and space domain, while the unlicensed band is overcrowded seriously.
大部分授权频段在时域、频域和空间域的利用率很低，而公共频段出现了严重的频谱拥挤。
Accordimg to the results of wave form and frequency domain analyses of pressure fluctuation signals, characteristics of pressure fluctuation at different space locations were discussed.
根据压强脉动信号波形和频域的分析结果，研究了三相流化床不同空间位置压强的脉动特征。
The frequency domain and space domain anti-stealth techniques of radars are summarized, and Fight F-117A is taken as a typical example in order to discuss the radar detectability of stealth vehicles.
本文综合论述雷达的频域反隐身与空域反隐身技术并以F- 117a飞机为例探讨了隐身飞行器的雷达可探测性。
The image damage by transform coefficients quantization in ID-DCT transform compression coding is analysed on frequency domain and space domain. Some useful results are obtained.
本文对一维DCT变换压缩编码中变换域系数二次量化引起的图象损伤进行了频域和空间域分析，得出了一些有用的结论。
By the family of wavelet basis function of wavelet Composition, it can describe the signal time (space) and frequency (scale) domain of the local characteristics.
小波由一族小波基函数构成，它可以描述信号时间(空间)和频率(尺度)域的局部特性。
Laser radars are widely used in target detecting, tracking, aiming and imaging recognition because its extremely high resolution in frequency domain, space domain and time domain.
激光雷达因为极高的频域、空域和时域分辨率而在目标探测、跟踪、瞄准和成像识别等方面得到越来越广泛的应用。
The frequency domain response of single pile embedded in half-space saturated soil and subjected to Rayleigh waves was investigated.
研究了频域内半空间饱和土中单桩在瑞利波作用下的动力响应。
By investigating the code space in frequency domain and the data vector space of the multipath signals, the noise-subspace-based approach is used to perform blind channel estimation.
通过研究多径信号频域码空间和数据矢量空间，采用噪声子空间技术进行盲信道估计。
The finite difference depth migration equation in space-frequency domain can be derived when the radical expression is approximated by continued fraction.
采用连分式近似，可以得到空间频率域的有限差分深度偏移方程。
The procedure for deriving the stochastic road irregularities is given with the application of space frequency domain road model.
从空间路面频率谱出发给出了模拟随机路面谱的方法。
The MIMO-OFDM channel estimation method is researched based on the system design, and a space-frequency domain optimal pilot-tones design algorithm is presented.
从系统设计角度研究了MIMO-OFDM系统的信道估计方法，提出一种基于空频域的最优导频设计算法。
The results provide precise measurements of the dynamics characteristics of the space deployable structure in the time-frequency domain, which are helpful for improving the system analysis and design.
实现了对航天可展结构动力学性能在时频域内的“精细”考察，将有助于提高航天器结构的分析与设计水平。
The differential coding is performed in the time domain, while the space-frequency coding is processed in the frequency domain to achieve the diversity ga.
该方法在时域进行差分编码，而在频域进行空频编码以获得分集增益。
The FRFT has signal representation property both in space and frequency domain. The original image and the watermark is transformed with different orders to improve watermarking security.
分数傅里叶变换具有空域和频域双域表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。
The FRFT has signal representation property both in space and frequency domain. The original image and the watermark is transformed with different orders to improve watermarking security.
分数傅里叶变换具有空域和频域双域表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。
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