智能功率控制产品的设计

构建和维护合适的功率环境对系统的正确运行非常关键。对功率的控制和管理越来越受到重视，无论是简单的手持式便携设备，还是多服务器机架系统，都希望能够节省能耗、降低成本。     

DAB发射端信道编码技术的研究及其实现

本文介绍了DAB（数字音频广播）发射端的信道编码过程及其关键技术，并用软件实现了信道编码算法。与硬件模块协同工作良好。     

多维树枝状有机分子的双光子吸收特性

利用响应理论方法,研究了新近合成的以二-(苯乙烯基)苯为主干的多分枝有机物的双光子吸收特性.结果表明这些多维有机分子显示了较好的双光子吸收特性,其中A-π-A型的有机分子具有较大的双光子吸收截面,进一步说明了到底是对称型的还是不对称型的有机分子具有大的双光子吸收截面还与分子的π中心有关.     

下一代宽带接入网--可体验的宽带精品网

当前宽带线路的带宽承载能力多在512kbit／s～2 Mbit／s，宽带业务基本仅限于高速上网：随着视频等高带宽业务的逐步涌现，增加带宽提高速率成为下一步宽带发展的迫切需求。据保守估计，至少需要10Mbit／s以上带宽才能实现Stream Video、Video Conference、Video Phone、高速上网等业务。在未来带宽不断变大和业务不断丰富的基础上，     

利用LIN节点的温度显示

串行多路传输总线如CAN或LIN可以解决车内因导线过多所带来的许多问题。低成本的LIN总线很适合应用于车门等这些对传输速率要求不高的场合,最高速率为20kbit/s的LIN总线完全可以满足要求。车外温度显示就是这样一个应用实例,外部温度传感器通常布置在后视镜中,数据产生于车门。但是实际显示位置是距此一定距离的车内,LIN总线可使布线简单,因为LIN节点只有3根导线:LIN数据线、电源线和地线。     

Distributed Optical Fiber Sensor for Multi-point Temperature Measurement

The distributed optical fiber sensing technology is overviewed, which is based on Raman scattering light theory. Basic operation principle, structure, system characteristics and signal processing are discussed. This structure and method of the signal processing possess of certain spatial resolution, hence will ensure the practicability of system.     

Experimental Research on Erbium-doped Superfluorescent Fiber Source

The effects of the variations in fiber length, fiber mirror reflectance on efficiency and output power are experimentally investigated for erbium-doped double pass backward superfluorescent fiber sources (SFSs). The influence of fiber length on mean wavelength stability (MWS) has also been demonstrated. By incorporating a short section of un-pumped erbium-doped fiber (EDF) at the output port, the pump power dependent on MWS becomes independent of pumped EDF length. This is a novel phenomenon that hasn‘t been reported up to now,and should be helpful to SFS fabrication and theory analysis. By using a fiber Michelson interferometer as spectrum slicing component,a multi-wavelength fiber source (MWFS) with ～20 channels (from 1542nm to 1559nm) is got. The MWFS has a channel spacing of ～0. 8 nm which satisfies ITUstandard. The intensity fluctuation among channels is less than 0.5dB,and the extinction ratio of all channels is above 14dB. This kind of MWFS should be useful to wavelength division multiplexing systems.     

一种改善Turbo乘积编码OFDM系统性能的新方法

本文提出一种利用对译码器软信息限幅来改善多径衰落信道中Turbo乘积编码OFDM(TPC-OFDM)系统性能的新方法。通过对不同多径衰落信道中QPSK映射和16QAM映射的TPC-OFDM系统性能的数值仿真，结果表明在10^-5误比特率下，这种新方法比传统的迭代译码大约有6～10dB的改进，对严重多径环境下TPC-OFDM系统的错误平底也有明显的改进。