ID 原文 译文
53257 利用局部多项式傅里叶变换（LPFT）构建时频滤波器，确定自项支撑区域，再利用此滤波器对 WVD 进行处理，从而达到抑制交叉项的目的。 First, the time-frequency filtering based on the local polynomial Fourier transform (LPFT) is constructed, then the filtering is used to determine the auto term region and suppress cross terms in the WVD.
53258 通过 3dB 信噪比的分析可以看出，LPFT 具有比短时傅里叶变换（STFT）更好的时频聚集性，因此基于 LPFT 的时频滤波器能更有效抑制 WVD 中的交叉项干扰，同时又能保留 WVD 的高时频聚集性。 As shown in the 3dB SNR analysis, the LPFT can provide better resolution than the STFT, therefore, the LPFT-based time-frequency filtering can effectively suppress cross terms in the WVD, as well as maintain the high resolution characteristic of the WVD.
53259 通过与 Chio-Williams 分布、径向高斯核函数时频分布、基于 STFT 时频滤波器的交叉项抑制方法的比较，验证了该方法对抑制多分量信号及非线性调频信号的交叉项以及噪声干扰的有效性，显示了该方法在保持高时频聚集性，抑制交叉项干扰，以及抑制噪声干扰方面的优势。 Compared with the Chio-Williams distribution, the radially Gaussian kernel time-frequency representation, and the WVD cross term suppression method using the STFT-based filtering, the proposed method proves its advantages in cross term suppression, as well as in noise suppression, for multicomponent or nonlinear FM signals.
53260 宽带信道化接收中常常采用均匀子带技术， Uniform subband technology is popular in broadband channelization.
53261 当宽带接收数据中的信号参数未知时，均匀子带信道化易造成信号频谱割裂。 When the signal characteristics are unknown, uniform subband channelization will lead to disseverment of signal spectrum.
53262 本文针对该问题建立了单载波信号子带信道化输出的数学模型， The mathematic model of subband channelization is established for single-carrier signal.
53263 通过将信号的频谱损失视为码元成型函数的变化，证明了子带信号保留了原信号的循环平稳特性， The spectrum distortion is considered as the transition of shape function. Therefore the subband signal preserves the cyclostationarity of original signal.
53264 提出了一种新的基于子带信号复包络平方谱的波特率估计算法。该方法不需要重构出原信号，利用频谱有损的子带信号就能进行参数估计，提高了宽带处理的效率。 A new baud rate estimation algorithm is presented based on the envelope characteristic of subband analytic signal without reconstructing the original signal. This algorithm improves the efficiency of the broadband processing.
53265 仿真实验给出了在不同带宽覆盖比和不同信噪比下算法的估计性能。 The influences of the frequency domain coverage percentage and Signal Noise Ratio (SNR) are analyzed with the computer simulation.
53266 理论分析和仿真结果验证了算法的有效性和可靠性。 Simulation results and theoretical deductions prove that this algorithm is efficient and credible。