一种新型的IR-UWB均衡接收机

IR-UWB系统中的密集多径和随机的时延扩展带来了严重的码间干扰,若不采取均衡技术抑制码间干扰,将严重限制系统的性能.针对接收机的位置改变能引起信道模式改变,设计了一个新型的MF-DFE接收机,根据传输速率信息和判决设备得到的信道模式的信息,在快时变的混合信道下,动态的配置判决反馈均衡器的长度进行均衡接收.仿真表明该接收机在快时变的IR-UWB混合信道情况下,在高的传输速率下仍能获得良好的性能.     

一种高速串行信号线性均衡电路

设计了一种高速串行信号连续时间线性均衡器。采用有源电感负载结构,结合高频与全频通路信号求和技术来实现高速串行信号均衡。电路具有面积小、功耗低、利于集成等优点。采用65 nm CMOS工艺进行设计,1.2 V电源供电,可对经过80 cm长的衰减信道、且传输速率为14 Gbit/s的信号进行补偿,实现6.24 dB@10.96 GHz的补偿。该均衡器将输出端信号眼图水平方向抖动减小至0.25UI,功耗数据率比低至0.399 mW·s/Gbit,设计版图面积为0.09 mm²。     

Compact wideband bandpass filter with equiripple response in both magnitude and delay

Aiming at the reduction of the in‐band delay variation, a wideband bandpass filter with equiripple response in both magnitude and group delay is presented and studied. The filter is composed of one section of end‐connected coupled line and two short‐circuited shunt transmission line stubs, all of them are uniform and equal in electrical length. Design formulas are given to calculate the characteristic impedances of the lines to meet the filtering specifications. By changing the coupling strength of the coupled line section, the group delay can be controlled to be equiripple in band, while the remaining equiripple response in magnitude unchanged. For verification, a filter sample is fabricated and measured. In experiment, it exhibits a delay variation of 0.11 ns and minimal insertion loss of 0.2 dB within its passband (|S₁₁| < ?14 dB) from 0.48 to 1.46 GHz, which validates the theoretical predictions.     

Channel Pre-emphasis Equalization for a 270 km 40×40 Gbit/s WDM System with Cascaded EDFAs/Raman Amplifiers

Optical channel pre-emphasis equalization is experimentally researched for a 270 km 40 × 40 Gbit/s wavelength division multiplexing （WDM） transmission system with three Erbium-doped fiber amplifiers （ED- FAs） and Raman amplifiers concatenated as booster amplifier. The channel imbalance of the overall system changes with different sets of power launched into EDFAs. By appropriately choosing the power input to concatenated EDFAs, the output spectrum of 40 channel signal can be equalized to the most extent. The merit of benefit can be around 5.5 dB by this pre-emphasis equalization. The requirement for the gain equalizer is therefore greatly released. Then the gain imbalance of the overall system and the power imbalance of 40 channels are compared and the two almost matches, but the significant difference lies on some channels. Finally, the pump power into Raman amplifier is also optimized, and another 1.3 dB improvement of channel equaliza- tion can be further achieved.     

一种改进的多模高性能盲均衡算法

提出一种多模高性能盲均衡改进算法。该算法采用多模切换和变换步长的方法,具有较快的收敛速度和收敛后较小的剩余码间干扰。计算机仿真表明,此算法不受随机信号随机性的影响,特别是对16QAM信号,收敛速度较快,且收敛后的抖动几乎为零。     

便携式工业“听诊器”的研制

介绍一种采用单片机和专用集成电路（MSM6588、TA7796、TMS29F040、LM386）实现声音数据的记录、存储、传送、回放和分析等,应用于工业设备监测的“听诊器”。     

双模方形谐振腔增益均衡器的设计与实现

针对均衡器小型化、高Q值的应用需求,提出并设计了一个工作在Ku波段的双模方形基片集成波导谐振腔均衡器.设计了两个正交的耦合缝隙,在谐振腔中激励起简并模TE₂₀₁和TE₁₀₂;使用金属柱微扰其中一个模式,实现独立调节该模式的谐振频率,并且频率调节自由度高;研究了薄膜电阻的加载位置,实现独立调节两个模式的衰减量和Q值;分析了双模谐振腔级联后谐振频率偏移量及可调性,给出了双模谐振腔均衡器的分析和设计方法.相比于传统单模谐振腔均衡器,该结构均衡器保持了原有的工作性能,并减少了一半数量的谐振腔,使得结构更加紧凑.测试结果与仿真结果吻合,最大误差0.4dB.     

基于非单点模糊RBF网络的判决反馈均衡器

提出了一种具有较强抗突发干扰能力的非单点模糊径向基函数（Radial Basis Function,RBF）网络判决反馈均衡器.该方法将具有前置滤波特性的非单点模糊化技术引入RBF网络,利用梯度下降法自适应调整参数.通过仿真实验,并与基于径向基函数网络的判决反馈均衡器（Radial Basis Function Network-Decision Feedback Equalizer,RBFN-DFE）和传统判决反馈均衡器（Decision Feedback Equalizer,DFE）进行比较,结果证明该方法抗突发干扰能力强,误码性能好.     

基于遗传优化的正交小波分数间隔盲均衡算法

针对传统的常数模盲均衡算法(CMA)收敛速度慢、稳态误差大和局部收敛的缺点,提出了一种基于遗传优化的正交小波分数间隔盲均衡算法(WT-FSE-GA).该算法通过对分数间隔均衡器的输入信号进行正交小波变换,以降低信号的自相关性,并利用遗传算法全局随机搜索的特性,对均衡器权向量进行优化,以降低CMA陷入局部收敛的可能性.与...     

基于SOC的电池均衡控制技术的仿真研究

提出了一种电感电流临界模式的均衡控制策略,设计了基于SOC的磷酸铁锂电池均衡控制系统,由主控CPU模块控制MOSFET开关管的导通与否,将能量从电池组中SOC最高的电池传递到SOC最低的电池,最后达到每节电池有相同的SOC。采用matlab/simulink进行系统建模和仿真,结果表明电池组无论处于充放电状态还是处于静置状态都能达到良好的SOC均衡效果。