一种5G NR系统PSS叠加分段的定时同步算法

对于第三代合作伙伴计划(The 3rd Generation Partnership Project,3GPP)中的5G新空口(New Radio,NR)系统,同步信号检测算法的计算非常复杂,根据主同步信号的特性,提出了分段互相关与对应叠加的联合检测算法。该算法只对接收信号进行一次与本地主同步信号(Primary Synchronization Signal,PSS)序列之和的分段相关处理,即可得到相关峰值的位置,并检测到粗同步点的位置,进一步对粗同步点做局部互相关,根据最大峰值检测出精同步点,降低了计算的复杂度。对传统互相关算法、分段互相关算法和改进算法进行了理论推导和复杂度对比分析,结果表明,相对于传统互相关算法,改进后的算法有效降低了计算量,提升了抗频偏性能。     

基于导频受限短突发通信的高精度快速频偏估计

针对导频符号辅助调制（PSAM）的导频受限短突发通信载波同步，提出了一种高精度快速的频偏估计算法。其基本原理是：利用自相关算子得到具有较大估计范围和较低信噪比门限的联合自相关算法，再利用互相关算子获得具有高精度的简化互相关算法。理论分析和仿真结果表明，提出的算法能够消除大频偏，而且还具有较低的复杂度和良好的解调性能。     

International synchronization of the Mexican states business cycles: Explaining factors

The aim of this paper is to identify the explaining factors of the synchronization of the business cycles of the Mexican states and those of the US economy. The cycle indicator is obtained by de-trending the series of total formal employment (Mexican states) and nonfarm employment and industrial production (US). In general, our panel data model estimations suggest the existence of spatial autocorrelation and significant time-period fixed effects. Also, the estimates indicate a significant and positive effect of the ratio of foreign direct investment to gross domestic product (GDP), which may be supplementing the impact of international trade (driven by the most internationally integrated states) and a negative effect of the ratio of remittances to GDP (driven by less integrated states). Finally, the evidence suggests that more similar productive structures yield more synchronized business cycles.     

Business cycles in EU new member states: How and why are they different?

This paper uses the business cycle accounting framework to investigate the differences between economic fluctuations in Central and Eastern European (CEE) countries and the euro area. We decompose output movements into the contributions of four economic wedges, affecting the production technology, the agents’ intra- and intertemporal choices, and the aggregate resource constraint. We next analyze the observed cross-country differences in business cycles with respect to these four identified wedges. Our results indicate that business cycles in the CEE countries do differ from those observed in the euro area, even though substantial convergence has been achieved after the eastern EU enlargement. The major differences concern the importance of the intra- and intertemporal wedges, which account for a larger proportion of output fluctuations in the CEE region and also exhibit relatively little comovement with their euro area counterparts.     

基于量子纠缠的对钟协议的实施和应用

文章首先讨论了基于量子纠缠的对钟协议,提出了2种不同实施协议的物理实例,即Cs原子比特(即Cs原子的二能级)协议和自旋比特协议。通过使用双频率方案,有效消除了对钟双方由于持有不同的对偶态而导致的误差。     

WCDMA中FDD模式下的RNC-Iub/Iur接口同步方案

本文探讨了WCDMA中频分双工（FDD）模式下的RNC-Iub/Iur接口同步技术,阐述了“RNC-Node B”节点同步的概念,实现过程及其应用,讨论了连接帧编号（CFN）的定制技术,提出了CFN的获得方法。此外,还介绍了传输信道同步和接收窗的概念,讨论了传输信道同步的实现过程,并提出了Node B中接收窗的配置方法。     

USA,Japan and the Euro Area: Comparing Business‐Cycle Features

There has been much discussion of the differences in macroeconomic performance and prospects between the USA, Japan and the Euro area. Using Markov‐switching techniques, we identify and compare specifically their major business‐cycle features and examine the case for a common business cycle, asymmetries in the national cycles and, using a number of algorithms, date business‐cycle turning points. Despite a high degree of trade and financial linkages, the cyclical features of USA, Japan and the Euro area appear quite distinct. Documenting and comparing such international business‐cycle features can, for example, aid the development of business‐cycle models and inform policy making.     

自适应帧同步器的设计与实现

“9·11”事件后美国发起了全球范围内的金融反恐战,本文介绍了金融反恐的由来、国际上关于金融反恐的标准、世界上主要国家目前的反洗钱反恐融资(AML/CFT)机制以及我国金融反恐的现状,并分析了金融反恐目前存在的问题和困难。     

CHEN系统的混沌同步

分析了CHEN系统的稳定性，用APD方法构造了一个同步系统，并用FORTRAN程序进行了数值仿真，给出了系统同步误差图，结果表明驱动系统和响应系统能够很好的达到同步。