基于CPLD设计实现单横单纵激光器种子注入纵模锁定

基于自滤波非稳腔、种子激光注入及CPLD控制的干涉法纵模锁定技术,研制出一套单横单纵激光器系统；对激光器的工作原理及纵模锁定电路设计进行了说明。该设计具有输出光束质量好,工作稳定,抗干扰性强的特点。该激光器经历了在强干扰环境中长时间的“烤机”实验,单纵模锁定概率达100%。     

基于OFDM信号周期平稳特性的盲信道估计算法

该文提出一种基于信号周期平稳特性的盲信道估计算法,用于频率选择性衰落环境下的正交频分复用(OFDM)系统。该算法利用OFDM信号本身具有的周期平稳特性以及其周期自相关函数值的能量分布规律,确定信道阶数,并通过确定信道零点的方法间接获得信道冲激响应。理论和仿真结果表明,与其它的盲信道估计算法相比,该算法不仅可以较准确地获得信道阶数,而且降低了信道估计的均方误差。     

SOC设计中的硬核复用及其工艺移植

IP复用已成为SOC(system-on-chip)芯片设计的主要手段之一.以一款0.18 μm工艺下的温度控制芯片设计为例,具体介绍硬核复用设计的工艺移植问题,并给出了一种基于工艺设计工具包的设计流程及其关键技术解决方案.该设计流程在保证电路功能正确性的同时,又可以减少版图设计的设计周期,可以为其他类似硬核的复用设计提供参考.     

The Economical PAPR Minization Scheme for Combinative Coding Technique Applied OFDM Communication System

In this paper, we propose a new combinative scheme to combine with parity check and block coding methods for the reduction of the peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) system. In the proposed schemes, the simulation results shown that Peak-to-Average Power Ratio (PAPR) can be reduced by 3.502 dB. The results of this mapped can be shown that PAPR is reduced. The principle of the scheme is illustrated with the specific example of an eight-carriers signal and its computer simulation results. All simulation results have compare with ideal channel case and AWGN case separately; both of cases are shown the PAPR reduced indeed. Do Horng Guo received his B.S. Degree in Electronic Engineering from National Taiwan Marine Science University, Keelung, Taiwan, in 1983, and M.S. Degree in Computer Communication from Northrop University, Los Angeles, USA, in 1986. He is enrolled in Ph.D program in Graduate Institute of Communication Engineering of Tatung University from 2001. His current interest includes wireless communication system and digital signal processing. Chau-Yun Hsu received his B.S. degree M.S. and Ph.D in Electrical Engineering from Tatung Institute of Technology, Taipei, Taiwan, in 1981, 1983 and 1988, respectively. He was the lecturer in Department of Electrical Engineering of Tatung University from 1983 to 1985. From 1988 to 1997, he served as the Associate professor of Tatung University. Since 1998, he has been the Chair Professor of Graduate Institute of Communication Engineering of Tatung University. Now he is also the chair of department of Electrical Engineering of Tatung University. His current interest includes Wireless Channel Model and Estimation, Machine Learning, Digital Signal Processing and Image Processing.     

Spatiotemporal Magnetocaloric Microenvironment for Guiding the Fate of Biodegradable Polymer Implants

The degradation behavior of implants is significantly important for bone repair. However, it is still unprocurable to spatiotemporally regulate the degradation of the implants to match bone ingrowth. In this paper, a magneto-controlled biodegradation model is established to explore the degradation behavior of magnetic scaffolds in a magnetothermal microenvironment generated by an alternating magnetic field (AMF). The results demonstrate that the scaffolds can be heated by magnetic nanoparticles (NPs) under AMF, which dramatically accelerated scaffold degradation. Especially, magnetic NPs modified by oleic acid with a better interface compatibility exhibit a greater heating efficiency to further facilitate the degradation. Furthermore, the molecular dynamics simulations reveal that the enhanced motion correlation between magnetic NPs and polymer matrix can accelerate the energy transfer. As a proof-of-concept, the feasibility of magneto-controlled degradation for implants is demonstrated, and an optimizing strategy for better heating efficiency of nanomaterials is provided, which may have great instructive significance for clinical medicine.     

Cr2O3二维薄膜的气敏光学特性研究

本文介绍了用溶胶凝胶法制轩Ｃｒ２Ｏ３二维薄膜的方法,并研究了其在乙醇蒸气中和氨蒸气的气敏透射光谱,发现其光学透过率随乙醇蒸气和氨蒸气浓度增加而显著地单调上升,敏感波段扩展到整个可见光区域。其气敏光学特性的灵敏度、单调性及可重复性均可满足光纤传感技术的要求,有望成为制造气敏光结传感器的新材料。本文变讨论了Ｃｒ２Ｏ３的气敏光学机理。     

分组无线通信控制器的设计

文章介绍了一种新型的用于组成无线计算机通信网的通信控制器的设计,这种通信控制器具有高速的特点,它可以利用一般的ＵＨＦ,ＶＨＦ通信机通信,组成计算机分组无线网。     

新型红外硅微电流光电池的研制

利用ＰＮ结的光生伏特效应,采用集成电路的工艺技术和特殊处理方法,研制成功了短路电流大于１０μＡ,开路电压大于８Ｖ的红外硅微电流光电池。     

面向云物联网的车辆远程智能监控系统的研究

物联网和云计算使我们进入了网络时代的新阶段。将物联网“物物相连,全面感知”的特征与云平台的“云计算,云存储”能力全面整合,为相关行业形成完整统一的网络服务平台,是互联网 的有效实践方式。针对目前车载监控系统功能相对简单,难以满足将来智能交通对其的系统化、智能化的要求的问题。研究采用物联网技术和云计算理念,实现了面向云物联网的车辆监控信息平台,为车辆的远程智能监控提出了新的发展思路。