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2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT)最新文献

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Nonlinear modeling of mixed-signal system based on X parameters 基于X参数的混合信号系统非线性建模
He Yu, Guohui Yang, Qun Wu
The characterization and modeling of mixed-signal systems is presented in this paper. The state of the art of software-defined radio is of great significance for the integration of wireless communication systems. In this paper, RF Digital-to-Analog Converters (DACs) will be taken as an example to characterize the nonlinear behavior of mixed-signal systems. The basic theory, measurement platform and key technique for mixed-signal systems modeling based on X-parameters are presented in detail, which vividly explains the nonlinear behavior of mixed-domain consisting of digital and analog signals.
本文介绍了混合信号系统的表征和建模。软件无线电技术的发展现状对无线通信系统的集成具有重要意义。本文将以射频数模转换器(dac)为例来描述混合信号系统的非线性行为。详细介绍了基于x参数的混合信号系统建模的基本理论、测量平台和关键技术,生动地解释了由数字和模拟信号组成的混合域的非线性行为。
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引用次数: 0
Universal filtered multi-carrier with dynamic sub-band allocation 通用滤波多载波动态子带分配
Jinyu Wang, Lin Qi, Wei Zhang, Zi Xiao, Mingyue Cao
In this paper, we introduce a novel framework to allocate sub-bands dynamically for Universal Filtered Multi-Carrier (UFMC). Compared with the conventional uniform sub-band allocation, the proposed framework adjusts the size of sub-band based on the user demands, which improve the utilization efficiency of the subcarriers. Numerical simulations show that the proposed frame has similar performance on reliability, however outperforms the regular one in terms of flexibility.
本文提出了一种新的通用滤波多载波(UFMC)子带动态分配框架。与传统的均匀子带分配方法相比,该框架根据用户需求调整子带大小,提高了子载波的利用效率。数值仿真结果表明,该框架在可靠性方面具有相似的性能,但在灵活性方面优于常规框架。
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引用次数: 0
Research on modulation identification of digital signals based on deep learning 基于深度学习的数字信号调制识别研究
Jiacheng Li, Lin Qi, Yun Lin
Modulation identification shows great significance for any receiver that has little knowledge of the modulation scheme of the received signal. In this paper, we compare the performance of a deep autoencoder network and three shallow algorithms including SVM, Naive Bayes and BP neural network in the field of communication signal modulation recognition. Firstly, cyclic spectrum is used to pre-process the simulation communication signals, which are at various SNR (from −10dB to 10dB). Then, a deep autoencoder network is established to approximate the internal properties from great amount of data. A softmax regression model is used as a classifier to identify the five typical communication signals, which are FSK, PSK, ASK, MSK, QAM. The results for the experiment illustrate the excellent classification performance of the networks. At last, we discuss the comparison of these methods and three traditional shallow machine learning models.
调制识别对于任何不了解接收信号调制方案的接收机都具有重要意义。本文比较了深度自编码器网络与支持向量机、朴素贝叶斯和BP神经网络三种浅层算法在通信信号调制识别领域的性能。首先,利用循环频谱对不同信噪比(- 10dB ~ 10dB)的仿真通信信号进行预处理。然后,建立一个深度自编码器网络,从大量数据中逼近内部属性。采用softmax回归模型作为分类器,对FSK、PSK、ASK、MSK、QAM五种典型通信信号进行分类。实验结果表明,该网络具有良好的分类性能。最后,我们讨论了这些方法与三种传统浅机器学习模型的比较。
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引用次数: 25
Design of 24GHz microstrip phased array antennas with low side-lobe 低旁瓣24GHz微带相控阵天线设计
Li-jia Chen, Mengyao Yan
A 24GHz microstrip phased array antennas with high gain and low side-lobe is designed for antomotive anticollision radar in this paper. The proposed microstrip antenna array is fed by a series-parallel feeding network which can reduce loss of feed network and realize miniaturization of antenna on basis of satisfying requirement of each element of antenna array excited by the unequal amplitude. The simulation results show the 8×12 antenna array has a bandwidth of 1.1GHz. The maximum scanning angle is about ±30°, and the minimum gain about 25dB. In the process of scanning angle, the maximum beam width of E-plane and H-plane is 6°and 14.2°. And the first side-lobe level is −18dB and −19dB.
本文设计了一种用于汽车防撞雷达的高增益低旁瓣24GHz微带相控阵天线。该微带天线阵列采用串并联馈电网络馈电,在满足天线阵列各单元受不等幅值激励的要求的基础上,降低了馈电网络的损耗,实现了天线的小型化。仿真结果表明,8×12天线阵列的带宽为1.1GHz。最大扫描角度约为±30°,最小增益约为25dB。在扫描角度过程中,e面和h面最大波束宽度分别为6°和14.2°。第一副瓣电平为−18dB和−19dB。
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引用次数: 14
Study on distributed capacitances of multi-conductor transmission lines in dielectric layers 介质层中多导体传输线分布电容的研究
Yang Li, Lu Guizhen
The crosstalk between transmission lines is closely related to their distributed parameters. In this paper, the distributed capacitance parameters of multi-conductor transmission lines in dielectric layers are studied. Finite element method is applied to calculating the capacitance matrix of transmission lines models. The potential distribution of model is illustrated. The influences of dielectric layers on distributed capacitance parameters are mainly discussed and analyzed. It is found that dielectric layer has a great influence on distributed capacitances of transmission lines.
传输线间的串扰与其分布参数密切相关。本文研究了介质层中多导体传输线的分布电容参数。采用有限元法计算传输线模型的电容矩阵。给出了模型的势分布。主要讨论和分析了介质层对分布电容参数的影响。研究发现,介质层对输电线路的分布电容有很大的影响。
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引用次数: 2
A discontinuous Galerkin surface integral equation method with adaptive cross approximation acceleration 具有自适应交叉逼近加速度的不连续Galerkin曲面积分方程方法
Yun Lin, Liangshuai Guo
A discontinuous Galerkin integral equation domain decomposition method based on adaptive cross approximation (ACA) is presented. The CN/LT basis function is used for correctly representing the continuity of the induced current on the boundaries. ACA is used for accelerating the solving of the linear system. Several numerical examples are given to demonstrate the correctness and the effectiveness of the proposed algorithm.
提出了一种基于自适应交叉逼近(ACA)的间断伽辽金积分方程区域分解方法。CN/LT基函数用于正确表示感应电流在边界上的连续性。ACA用于加速线性系统的求解。算例验证了该算法的正确性和有效性。
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引用次数: 0
Design and analysis of tapered-slot Vivaldi antenna 锥形槽维瓦尔第天线的设计与分析
He Yu, Guohui Yang, Qun Wu
Vivaldi antenna is widely used for ultra wide band systems because of its wide band, low cost and high directivity. In this paper, a novel Vivaldi antenna is proposed for measurement system. The design and optimization method is introduced. By applying a tapered-slot structure to the conventional Vivaldi antenna, the radiation characteristics of the antenna are obviously improved. The band width of the proposed antenna is extended to lower frequency band. The model of proposed antenna is constructed and simulated by CST and the results are in accordance with what expected and satisfy the design requirement perfectly.
维瓦尔第天线以其带宽宽、成本低、指向性强等优点被广泛应用于超宽带系统中。本文提出了一种用于测量系统的新型维瓦尔第天线。介绍了设计与优化的方法。将传统的维瓦尔第天线采用锥形缝隙结构,可以明显改善天线的辐射特性。所提出的天线的频带宽度扩展到较低的频带。利用CST软件建立了天线模型并进行了仿真,仿真结果符合预期,完全满足设计要求。
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引用次数: 2
Small particle reconstruction method via SCA 基于SCA的小粒子重构方法
Chengzhuo Shi, Z. Dou, Yun Lin
With the continuous development of software defined radio(SDR) technology, the hunger for the reconstruction performance of the SDR system is getting higher and higher, especially in the area of effective small scale reconstruction. As we all know, software communication architecture(SCA) is a mature development framework for SDR, and the small scale reconstruction via SCA is a challenge currently. In this paper, we propose a small particle reconstruction methods based on the general method of reconstruction for SDR, which improves the reconstruction ability by the way to make the waveform component granular and some of them can be switched if needed.
随着软件无线电(SDR)技术的不断发展,人们对SDR系统重构性能的要求越来越高,尤其是在有效的小尺度重构方面。众所周知,软件通信架构(SCA)是一种成熟的SDR开发框架,而通过SCA进行小规模的重构是当前的一个挑战。本文在常规SDR重构方法的基础上,提出了一种小粒子重构方法,通过使波形分量粒度化,并且可以根据需要切换部分波形分量,提高了重构能力。
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引用次数: 0
Performance comparison of coordinated multi-point transmission strategies in C-RAN C-RAN中协调多点传输策略的性能比较
Ying Sun, Yuqing Zhong, Jia Li
Cloud-based Radio Access Network (C-RAN) could offer the benefit of mitigating inter-cell interference through facilitating cooperation techniques such as coordinated multi-point transmission (CoMP). This paper introduces the C-RAN architecture as well as different CoMP strategies to the multi-cell systems. Green advantages of C-RAN are presented and cooperation details of CoMP are analyzed. Simulations are conducted to compare the mean sum rate and energy efficiency performance of several CoMP strategies in the presence of different configurations of transmission power and fronthaul capacity.
基于云的无线接入网(C-RAN)可以通过促进协调多点传输(CoMP)等合作技术,提供减轻小区间干扰的好处。本文介绍了C-RAN体系结构以及不同的多小区系统CoMP策略。介绍了C-RAN的绿色优势,分析了CoMP的合作细节。通过仿真比较了几种CoMP策略在不同传输功率和前传容量配置下的平均和速率和能效性能。
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引用次数: 1
Research of the optimization and utilization of computer resources based on X3D scene and SSH2 surface framework 基于X3D场景和SSH2曲面框架的计算机资源优化与利用研究
Xu Wu, Wu Lei, Duan Xi Tong, R. Long, He Jin
Traditionally, the smallest unit of virtual scene is a model. In order to make use of the computer resources, the model is generally only loaded in a certain range of the current perspective. But in the virtual scene any browser can't observe all surfaces of this model in an angle of view invariable situation. Therefore it has wasted the massive computer resources similarly [1]. This project proposes a new framework model. Firstly, the minimum division unit of the virtual scene is changed into surface and loading the visible surface within the current viewpoint and preloading surface within a certain range of the current viewpoint to construct the current scene. Again taking the current viewpoint coordinates as the center, a layer of a layer of the outer surface of the visual surface is loaded on the coordinate system to form a radar coverage network. Secondly using the background management technology based on SSH2 to realize the model unified management and combing with the foreground X3D to generate the required scenes in real time, so as to achieve the goal of reducing rendering time of the virtual scene, saving computer resources and changing old patterns of environment fixed.
传统上,虚拟场景的最小单位是模型。为了充分利用计算机资源,模型一般只加载在当前视角的一定范围内。但在虚拟场景中,任何浏览器都无法在一个视角不变的情况下观察到该模型的所有表面。因此同样浪费了大量的计算机资源[1]。本项目提出了一个新的框架模型。首先,将虚拟场景的最小分割单元变为曲面,加载当前视点内的可见曲面和预加载当前视点内一定范围内的曲面,构建当前场景;再次以当前视点坐标为中心,将视觉面外表面的一层一层加载到坐标系上,形成雷达覆盖网。其次利用基于SSH2的后台管理技术实现模型的统一管理,并结合前景X3D实时生成所需场景,从而达到减少虚拟场景渲染时间,节约计算机资源,改变环境固定旧模式的目的。
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引用次数: 0
期刊
2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT)
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