虫虫首页| 资源下载| 资源专辑| 精品软件
登录| 注册

Quasi

  • 此文件用于仿真MIMO-STBC 系统性能程序

    此文件用于仿真MIMO-STBC 系统性能程序,包括了发送,mimo Quasi-static channel 和接收部分。用的是8psk调制

    标签: MIMO-STBC 仿真 系统性能 程序

    上传时间: 2014-01-20

    上传用户:13517191407

  • 最优化算法

    最优化算法,应用有限内存拟牛顿方法(Limited Memory (variable-storage)Quasi-Newton method)求解高维最优化问题,使用更多的内存将使算法更有效。

    标签: 优化算法

    上传时间: 2015-08-08

    上传用户:cuiyashuo

  • Computes BER v EbNo curve for convolutional encoding / soft decision Viterbi decoding scheme assum

    Computes BER v EbNo curve for convolutional encoding / soft decision Viterbi decoding scheme assuming BPSK. Brute force Monte Carlo approach is unsatisfactory (takes too long) to find the BER curve. The computation uses a Quasi-analytic (QA) technique that relies on the estimation (approximate one) of the information-bits Weight Enumerating Function (WEF) using A simulation of the convolutional encoder. Once the WEF is estimated, the analytic formula for the BER is used.

    标签: convolutional Computes encoding decision

    上传时间: 2013-12-24

    上传用户:咔乐坞

  • 伪随机数生成器

    伪随机数生成器,Implementation of the Quasi-Random Number generator currently hardwired to no more than 52 dimensions

    标签: 伪随机 生成器

    上传时间: 2013-12-20

    上传用户:teddysha

  • 产生正常分布的sobol sequences

    产生正常分布的sobol sequences,generating of normally distributed Quasi uniform distributed: sobol sequences

    标签: sequences sobol 分布

    上传时间: 2016-11-14

    上传用户:diets

  • Abstract-In this paper, simple autonomous chaotic circuits coupled by resistors are investigated. B

    Abstract-In this paper, simple autonomous chaotic circuits coupled by resistors are investigated. By carrying out computer calculations and circuit experiments, irregular self-switching phenomenon of three spatial patterns characterized by the phase states of Quasi-synchronization of chaos can be observed from only four simple chaotic circuits. This is the same phenomenon as chaotic wandering of spatial patterns observed very often from systems with a large number of degrees of freedom. Namely, one of spatial-temporal chaos observed from systems of large size can be also generated in the proposed system consisting of only four chaotic circuits. A six subcircuits case and a coupled chaotic circuits networks are also studied, and such systems are confirmed to produce more complicated spatio-temporal phenomena.

    标签: investigated Abstract-In autonomous resistors

    上传时间: 2014-06-09

    上传用户:h886166

  • Telecommunications Regulation

    Regulation is a pervasive feature of the telecommunications services industry today. Government-appointed regulators and judicial or Quasi-judicial bodies oversee it in countries at all stages of economic development. Its primary purpose is to encourage, nourish and maintain competition in national and international telecommunications services markets. It is, therefore, a fundamental feature of the legal and commercial landscape within which network owners and service providers operate. The modern development of regulation may be traced to the liberalisation of the industry from national monopolies from the 1980s onwards. 

    标签: Telecommunications Regulation

    上传时间: 2020-06-01

    上传用户:shancjb

  • 准谐振反激式电源设计之探讨.pdf

    低成本和高可靠性是离线电源设计中两个最重要的目标。准谐振(Quasi resonant) 设计为设计人员提供了可行的方法,以实现这两个目标。准谐振技术降低了MOSFET 的开关损耗,从而提高可靠性。此外,更软的开关改善了电源的EMI 特性,允许设计人员减少使用滤波器的数目,因而降低成本。本文将描述准谐振架构背后的理论及其实施,并说明这类反激式电源的使用价值。

    标签: 电源

    上传时间: 2021-11-23

    上传用户:

  • 基于IGBT的150KHZ大功率感应加热电源的研究

    本文以感应加热电源为研究对象,阐述了感应加热电源的基本原理及其发展趋势。对感应加热电源常用的两种拓扑结构-电流型逆变器和电压型逆变器做了比较分析,并分析了感应加热电源的各种调功方式。在对比几种功率调节方式的基础上,得出在整流侧调功有利于高频感应加热电源频率和功率的提高的结论,选择了不控整流加软斩波器调功的感应加热电源作为研究对象,针对传统硬斩波调功式感应加热电源功率损耗大的缺点,采用软斩波调功方式,设计了一种零电流开关准诺振变换器ZCS-QRCs(Zero-current-switching-Quasi-resonant)倍频式串联 振高频感应加热电源。介绍了该软斩波调功器的组成结构及其工作原理,通过仿真和实验的方法研究了该软斩波器的性能,从而得出该软斩波器非常适合大功率高频感应加热电源应用场合的结论。同时设计了功率闭环控制系统和PI功率调节器,将感应加热电源的功率控制问题转化为Buck斩波器的电压控制问题。针对目前IGBT器件频率较低的实际情况,本文提出了一种新的逆变拓扑-通过IGBT的并联来实现倍频,从而在保证感应加热电源大功率的前提下提高了其工作频率,并在分析其工作原理的基础上进行了仿真,验证了理论分析的正确性,达到了预期的效果。另外,本文还设计了数字锁相环(DPLL),使逆变器始终保持在功率因数近似为1的状态下工作,实现电源的高效运行。最后,分析并设计了1GBT的缓冲吸收电路。本文第五章设计了一台150kHz,10KW的倍频式感应加热电源实验样机,其中斩波器频率为20kHz,逆变器工作频率为150kHz(每个IGBT工作频率为75kHz),控制孩心采用TI公司的TMS320F2812 DSP控制芯片,简化了系统结构。实验结果表明,该倍频式感应加热电源实现了斩波器和逆变器功率器件的软开关,有效的减小了开关损耗,并实现了数字化,提高了整机效率。文章给出了整机的结构设计,直流斩波部分控制框图,逆变控制框图,驱动电路的设计和保护电路的设计。同时,给出了关键电路的仿真和实验波形。

    标签: igbt 电源

    上传时间: 2022-06-22

    上传用户: