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1.
本文探讨了南京软件著作权数据库管理系统的设计与实现,主要包括数据库管理子系统、数据检索加工子系统、用户接口子系统三个模块。其中又设置了基础数据模块、数据更新模块、系统管理模块、数据检索模块、统计分析模块、信息录入模块、操作界面模块、权限认证模块、数据输出模块、辅助决策模块、软件著作权应用服务模块。  相似文献   

2.
本文对整个系统功能通过数据存储模块、系统主模块、查询地址模块、路径规划模块、跟踪路径展示模块、新建跟踪模块模块以及远程跟踪模块来实现。  相似文献   

3.
阐述油烟实时检测报警系统的设计,系统由数据采集模块、数据处理模块、通信模块和人工交互模块组成。数据采集模块通过传感器采集当前环境的油烟浓度和温湿度等数据,由数据处理模块对采集到的数据进行处理,并通过通信模块上传至人机交互模块。  相似文献   

4.
《今日电子》2011,(3):49-49
新发布的原型就绪配件模块包括:USB2.0PHY接口模块、PCI接口模块、2-Channel PCI Master接口模块、SPI闪存模块、  相似文献   

5.
主要阐述一种GSM与TD-SCDMA微功率分布系统,所述系统包括主模块、扩展模块、远端无线模块及监控模块,所述主模块、扩展模块和远端无线模块顺序电连接,所述监控模块与主模块、扩展模块、远端无线模块分别电连接。本系统采用模块化布局,将原有分布的多种功能单元集成在三个模块中,并使用光纤和CATV进行集中通信,且上述模块采用中频传输方式通信,不用采用干线放大器进行线损自动补偿,引入噪音小。模块化的系统布局导致工程施工简单方便,同时各功能单元并集中处理且采用光纤进行远距离传输,在传输中减少了上行信号噪音的引入。  相似文献   

6.
林保康 《信息通信》2012,(6):120-121
随着社会经济的高速发展,网络融入了人们的生活,而网络购物逐渐成了人们的一种时尚,该系统采用ASP.NET+SQLServer2000+ADO.NET实现,系统结构采用B/S结构模式。本系统总共分为8个模块:数据库设计模块、用户注册模块、产品信息浏览模块、购物车模块、结算中心模块、客户留言模块、网站新闻模块和后台管理模块。  相似文献   

7.
文中介绍一种可以实现电子音量噪声抑制的模块。该模块主要有运算放大器模块、可调电阻Rf模块、I2C总线控制模块、数据缓冲模块、增益数据模块、时间基准模块、分压模块和输出缓冲模块组成。文章介绍了音频信号处理芯片的组成及原理,重点对音量控制部分进行阐述,对数字音量控制开关产生的噪声抑制方法进行了详细的分析。该芯片采用BICMOS工艺,工作电压在9V左右,实现了低失真低噪声的音频信号处理。  相似文献   

8.
在简述MSTP技术优势的基础上,研究了基于SDH的MSTP的设计与实现。讨论了平台的硬件和软件构成,详细介绍了平台硬件的功能模块——控制管理模块、交叉连接模块、以太网模块、E1模块、光接口模块、时钟同步和分配模块和电源模块,管理软件的功能模块——开销管理模块、设备配置管理模块、设备告警管理模块,并指出基于SDH的MSTP平台的有关结论和发展方向。  相似文献   

9.
将PLC通信系统分为传输模块、网络模块和特殊模块3部分,进而描述各个模块的具体功能,再进行功能模块的划分、硬件电路的设计、接口条件的分析、软件的模块划分和分层处理,其中着重给出了关键模块的设计方案,并总结了PLC关键模块的应用.  相似文献   

10.
韩立毛  赵跃华  朱伟玲 《通信技术》2010,43(4):109-111,114
为了使ESDBMS安全后端模块能有效地管理存储空间、快速检索数据库文件中的信息、提高存储管理的安全性,采用了分层设计的思想,对ESDBMS的安全后端模块进行整体框架设计和子模块划分,并分别对Cache管理子模块、表和索引管理子模块、加密子模块和OS子模块进行了设计,设计和实现了ESDBMS安全后端模块,该安全后端模块有利于拆卸和扩充,有利于实现ESDBMS整体的模块化,具有良好的实用性和创新性。  相似文献   

11.
This paper presents a high-performance coherent π/4-shift differential quaternary phase shift keying (DQPSK) demodulator (large scale integrated circuit) LSIC for the personal communication system in Japan, which is implemented on a 2-V operation 0.8-μm CMOS standard cell. The developed LSIC achieves a better bit error rate (BER) and frame error rate (FER) performance and a lower power consumption than conventional demodulators by employing new schemes: (1) a reverse-modulation carrier recovery circuit with a -π/4 phase rotator and a bandwidth-changeable carrier filter; (2) a bit timing recovery circuit using an initial bit timing estimation scheme; and (3) a fully digital orthogonal detector suitable for low power consumption. Performance evaluation confirms that the developed demodulator LSIC reduces the irreducible frame error rate by 40% and achieves an Eb/No improvement of 3 dB at an FER of 10-1 compared with differential detection in the Rayleigh fading typical of personal communication channels  相似文献   

12.
Analysis of the linear SIC for DS/CDMA signals with random spreading   总被引:1,自引:0,他引:1  
The linear successive interference canceler (LSIC) is a multiuser detector that employs the magnitude of the matched filter (MF) output as the received amplitude estimate of the detected user for use in signal reconstruction. This paper investigates the performance of the LSIC when random spreading sequences are employed. Specifically, the conditional mean and the signal-to-interference-plus-noise ratio (SINR) of the decision variable in each stage are derived to quantify the effects due to imperfect symbol and amplitude estimates. In addition, under the constraint that each user must achieve a certain SINR requirement, we examine the received powers needed for each of a specified number of users and the maximum number of users that a system can support when the LSIC is used in a base station. Computer simulations are presented to compare these results with those of several linear multiuser detectors.  相似文献   

13.
The signal-to-interference-plus-noise-ratio performance of the multistage linear parallel and successive interference cancellers (LPIC and LSIC) in a long-code code-division multiple-access system is analyzed using a graphical approach. The decision statistic is modeled as a Gaussian random variable, whose mean and variance can be expressed as functions of moments of R for the LPIC and L for the LSIC, respectively, where R is the correlation matrix of signature sequences and L is the strict lower triangular part of R. Since the complexity of calculating these moments increases rapidly with the growth of the stage index, a graphical representation of moments is developed to facilitate the computation. Propositions are presented to relate the moment calculation problem to several well-known problems in graph theory, i.e., the coloring, the graph decomposition, the biconnected component finding, and the Euler tour problems. It is shown that the derived analytic results match well with simulation results.  相似文献   

14.
This paper presents a very low power consumption one-chip baseband large-scale integrated circuit (LSIC) for personal communication terminals. It comprises a π/4-shift QPSK modem, an adaptive differential pulse code modulation (ADPCM) codec, a time division multiple access time division duplex (TDMA-TDD) controller and a link access procedure for a digital cordless (LAPDC: Layer-2 protocol) controller. The developed LSIC meets all the specifications of the personal handy-phone system (PHS) standard. By employing a novel coherent demodulator and an ADPCM codec with a click noise suppressor, a higher quality voice transmission has been achieved in a fading environment. In addition, it has 61-kb/s data transmission capability to achieve wireless multimedia services based on PHS. Moreover, the novel circuit configurations of the modem, the ADPCM codec, the TDMA-TDD controller, and the LAPDC controller achieve significant power reduction of the baseband circuits (57.4 mW) of personal communication terminals. It enables very low power consumption wireless multimedia terminals to be achieved based on the PHS common air interface  相似文献   

15.
A very low power consumption Viterbi decoder LSIC has been developed by using a low supply voltage 0.8 μm CMOS masterslice process technology. By employing the scarce state transition (SST) scheme, this LSIC achieves a drastic reduction in power consumption below 600 μW at a supply voltage of 1 V when the data rate is 1152 kbit/s and the bit error rate is less than 10-3. This excellent performance has paved the way to employing the strong forward error correction and low power consumption portable terminals for personal communications, mobile multimedia communications, and digital and audio broadcasting  相似文献   

16.
Performance evaluation of a generalized linear SIC for DS/CDMA signals   总被引:2,自引:0,他引:2  
The linear successive interference canceler (LSIC) is a multiuser detector that separates code-division multiple-access (CDMA) signals in a multistage manner. In each stage, a user is detected, and its contribution is regenerated and canceled from the input of that stage. A user's spreading sequence is employed for despreading and respreading, and the magnitude of the despreader output is used as the amplitude estimate to reconstruct that user's signal. This paper describes a generalized version of the LSIC (GLSIC) that employs various types of linear filters for the despreading and respreading operations. We analyze the bit error rate (BER), asymptotic multiuser efficiency (AME), and the mean and variance of the amplitude estimates of the GLSIC. It is shown that for certain choices of linear filters, complete cancellation of a user can be achieved, irrespective of the reliability of the symbol estimates. We also demonstrate that, from a BER and AME viewpoint, it is not beneficial to use a linear canceler with a decorrelator or a minimum mean-square-error (MMSE) receiver.  相似文献   

17.
在分析电离辐射引起场区隔离失效机理及场区电离辐射加固技术的基础上,开发了一套适用于研制辐射加固54HC系列和辐射加固大规模集成电路的CMOS工艺技术。辐射实验结果表明,该技术可比非加固电路的抗总剂量辐射能力提高两个数量级。  相似文献   

18.
The estimations of equivalent values for linear energy transfer of heavy charged particles based on the results of experimental investigations of sensitivity of LSICs to local radiation effects with the use of the procedure of local laser irradiation are presented. The possibility of recalculation of the energy of laser radiation into equivalent values of linear energy transfer with the use of the measurements of the ionization reaction in the supply circuit of LSIC is substantiated. Uncertainties caused by the characteristics of the interaction of optical radiation with semiconductor structures are eliminated in the suggested procedure.  相似文献   

19.
The design of a 14-bit delta-sigma analog-to-digital converter (ADC) with pipelined readout is considered. Basic concepts of the design of array photodetectors of the infrared (IR) range with an ADC in the accumulating cell are analyzed. The presence of an ADC in the readout large-scale integrated circuit (LSIC) cell provides an opportunity to increase the accumulation time by more than an order of magnitude and improve the threshold characteristics. A method for optimization of the ADC area by using an LFSR counter operating in two modes (digital code generation and serial readout) is proposed.  相似文献   

20.
A method of testing CMOS VLSIs for resistance to the factor of the absorbed dose under the effect of high-intense pulsed ionizing radiation by the results of analysis of the reaction of the LSIC in the radiation field of a sequence of relatively low-intense pulses is suggested and substantiated. The approach makes it possible to evaluate the levels of radiation resistance of CMOS LSICs at small simulating installations under the dose gained in the mode of a series of pulses. Conservatism is provided with respect to charge transfer and relaxation in the oxide of MOS structures being independent of the field mode and sample topology.  相似文献   

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