ID	原文	译文
53557	然后提取信号时频分布的3阶、7阶和11阶Rényi熵作为特征向量，得到具有维数低、类间差异较大的识别特征。	and then the third-order, seventh- order and eleventh- order Rényi Entropy of time-frequency distribution are used to construct a feature vector which has low dimensions and large between-class difference for radar signal recognition.
53558	最后采用支持向量机分类器实现信号的分类识别。	Finally the support vector machine is used to identify radar emitter signals automatically.
53559	文中对8种常见雷达信号进行了仿真实验，结果表明在较大的信噪比范围内，该方法能获得较为满意的正确识别率，	Simulation results show that the proposed approach can achieve satisfying accurate recognition over a wide range of SNR scenarios.
53560	当信噪比为-3dB时，采用时频分布Rényi熵特征的平均识别率仍能达到90.75%，验证了提出方法的有效性。	Even for SNR=-3dB, the accurate recognition rate still achieves 90. 75% by using Rényi Entropy of time-frequency distribution. The validity of the approach is demonstrated by experiments.
53561	D.J. Love 等在文献[7]中提出了基于正交空时码的有限反馈多天线系统，并且设计了至今保持最优性能的码本。	Based on Orthogonal Space-Time Block Codes (OSTBC), D. J. Love etc introduce a limited feedback MIMO system. For this system, based on analysis of performance, they also propose a designing criterion of precodebooks and design the practical precodebooks that keep the best-known performance.
53562	这一系统已经被 IEEE 国际标准所采用。	The system is adopted by IEEE international standards.
53563	针对这一系统，本文基于文献[16]中的预编码设计准则，提出了新的预编码设计方案。	For this system, this paper proposes a new designing scheme of precodebooks based on another designing criteria.
53564	相对于 Love 等在[7]中提出的码本，本文提出的新的码本在性能上有了提高。	Simulations show that precodebooks obtained by our scheme outperform D. J. Love’s scheme.
53565	并且本文新的码本还具有快速选码方案，在其性能损失较小的情况下，有效降低了选码复杂度。	Furthermore, our new codebooks have a fast encoding algorithm, which can effectively reduce the encoding complexity in the case of the performance lose is limited.
53566	设计了一款低噪声、低功耗的电荷泵，适用于相变存储器驱动电路中的锁相环时钟。	A low phase noise, low power charge pump for the PLL clock of phase change memory drive circuit is presented.