ID 原文 译文
23035 上述两个约束优化问题都是半正定规划问题，都可有效地求解。 Both the optimization problems are Semi-Definite Programming (SDP), which can be efficiently solved.
23036 新算法综合考虑了滤波器组的重构特性和频率特性，因此可以设计得到整体性能良好的 M 通道双正交过采样的图滤波器组。 Since the proposed method fully considerate the spectral characteristic and PR condition, M-channel biorthogonal oversampled graph filter banks with better performance can be  obtained.
23037 仿真对比表明，与已有的设计算法相比，新算法设计所得的图滤波器组具备更小的重构误差。 Numerical examples and comparison show that compared with the existing methods, the proposed method can lead to graph filter banks with smaller reconstruction error.
23038 该文对 Ka 波段空间行波管宽频带、高线性、高效率的慢波系统进行设计，通过动态渐变技术实现了低相位失真、高效率的指标要求。 In this paper, the design of Ka-band broadband, high-linearity and high-efficiency slow-wave system is proposed for Space Traveling Wave Tube (TWT). The dynamic phase-shifting technique is used to achieve low phase distortion and high efficiency.
23039 在此设计基础上研制的 Ka 波段空间行波管实现了宽频带(25~27 GHz)、低非线性失真(非线性相移£ 40 ° , AM/PM£ 2.86 °/dB ，三阶交调³ 10.39 dBc)、高效率(总效率³ 51.7%)。 Based on this design, the Ka-band TWT is developed to realize wideband (25~27  GHz ),  low  nonlinear  distortion  (non-linear  phase  shift  £ 40 ° ,  AM  /  PM£ 2.86 °/dB ,  third  order intermodulation  ³ 10.39  dBc ), high efficiency (total efficiency  ³ 51.7%).
23040 经数传系统测试，误码eP 优于610-的情况下0C/N 有 2.4  dB 裕度，满足了卫星数传系统对多通道并行传输方案的工作需求。 By the digital transmission system test, the error code eP  is better than 610- in the case of 0C/N  2.4 dB margin, it meets the satellite data transmission system for multi-channel parallel transmission program work requirements.
23041 针对 MC-CDMA 信号符号周期、有用数据周期、码片持续时间以及保护间隔长度等参数盲估计问题，该文提出一种改进型的循环自相关算法。 The modified cyclic autocorrelation algorithm is proposed to estimate problems of the useful data period, entire symbol period, chip duration, and guard interval length in MC-CDMA signal.
23042 首先在接收端对 MC-CDMA 信号求自相关函数，取傅氏变换，再在频域累积，通过检测不同切片上的谱峰间隔，可以同时估计以上多个参数。 Firstly, the autocorrelation function of the received MC-CDMA signal is computed. Then, Fourier transformation and accumulation in frequency-domain are used. Finally, through detecting the interval of the peak pulses in different slices, parameters mentioned above can be estimated.
23043 此外，根据 MC-CDMA 信号自身特点，提出一种新的估计符号周期方法—累加平均法，将 3 维图中平行于延时轴的每列谱线累加平均(间隔为符号周期)，可估计出符号周期。 In addition, a new method of estimating symbol period, the accumulative average method, is developed. By averaging amplitudes of the spectral lines in each column parallel to the delay axis, the symbol duration can be obtained.
23044 理论推导了 MC-CDMA 信号的循环自相关表达式，证明加循环前缀的 MC-CDMA 信号具有循环平稳性。 Cyclic autocorrelation expression of the MC-CDMA signal is derived theoretically, and it is proved that MC-CDMA signal with cyclic prefix has cyclostationary.