ID 原文 译文
39336 最后，仿真验证了所提方案的可行性以及具有满意的可达和速率，与其他相同硬件复杂度的混合预编码方案相比具有更优的可达和速率性能。 Finally, simulations verify the feasibility and satisfactory achievable sum-rate of the proposed scheme. It has better achievable sum-rate performance compared with other hybrid precoding schemes with the same hardware complexity.
39337 广播式自动相关监视(Automatic Dependent Surveillance-Broadcast，ADS-B)作为一种新的监视技术正受到国际民用航空组织(International Civil Aviation Organization，ICAO)的大力推广。 The Automatic Dependent Surveillance-Broadcast(ADS-B), as a new surveillance technology, is being vigorously promoted by International Civil Aviation Organization(ICAO).
39338 然而，由于ADS-B信号传输具有随机性，多条信号交织问题不可避免。 However, overlapping among multiple signals is inevitable because of the randomness of ADS-B signal transmission.
39339 本文将最小方差无失真响应(Minimum Variance Distortless Response，MVDR)算法应用于单天线ADS-B信号解交织。 In this paper, the Minimum Variance Distortless Response(MVDR) algorithm was applied to separate overlapping ADS-B signals received by single antenna.
39340 首先，将单天线接收到的数据转化为虚拟均匀线阵模型;然后利用阵列信号处理中的MVDR算法分离交织信号。 Firstly, the data that received by single antenna was transformed into virtual uniform linear array model, and then the overlapping signals could be separated by utilizing the MVDR algorithm in array signal processing.
39341 由于该算法需要准确估计信号频率，而针对快速傅里叶变换(Fast Fourier Transform，FFT)估计信号频率误差较大的问题，利用改进的频率估计方法能够降低信号频率估计误差，从而有效分离交织信号。 Because of the algorithm needs to estimate the frequency of the signal accurately, the frequency estimation error of Fast Fourier Transform(FFT) is large and the improved frequency estimation method can reduce it, so as to effectively separate the overlapped signals.
39342 仿真实验验证了该算法的有效性并且对信号之间相对时延问题不敏感。 The simulation results show that the algorithm is effective and insensitive to the relative time delay between signals.
39343 针对恒包络交替二进制偏移载波(Alternate Binary Offset Carrier， AltBOC)调制信号组合码序列难以估计的问题，提出了利用改进K-means算法进行信号组合码盲估计方法。 Aiming at the problem that it is difficult to estimate the combination code sequence of Alternate Binary Offset Carrier(AltBOC) signal, an improved K-means algorithm is proposed for blind estimation of AltBOC signal combination code.
39344 该方法首先通过引入互调分量以及重建副载波的方式构建AltBOC信号模型， The method firstly constructs the AltBOC signal model by introducing intermodulation component and rebuilding the subcarrier.
39345 然后在接收端将AltBOC信号分段成单倍组合码周期窗长的不重叠观测数据矩阵，并利用相似性原理从观测数据中选择最优的样本作为K-means聚类中的初始均值向量， Then, the AltBOC signal was segmented into a non-overlapping observation date matrix with period window length of combination code at the receiving end, and the optimal sample was selected from the observation data as the initial mean vector in K-means clustering by using the similarity principle.