此文件用于仿真MIMO-STBC 系統性能程序,包括了發送,mimo QuaSI-static channel 和接收部分。用的是8psk調制
上傳時間: 2014-01-20
上傳用戶:13517191407
最優化算法,應用有限內存擬牛頓方法(Limited Memory (variable-storage)QuaSI-Newton method)求解高維最優化問題,使用更多的內存將使算法更有效。
標簽: 優化算法
上傳時間: 2015-08-08
上傳用戶:cuiyashuo
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.
標簽: convolutional Computes encoding decision
上傳時間: 2013-12-24
上傳用戶:咔樂塢
偽隨機數生成器,Implementation of the QuaSI-Random Number generator currently hardwired to no more than 52 dimensions
上傳時間: 2013-12-20
上傳用戶:teddysha
產生正常分布的sobol sequences,generating of normally distributed QuaSI uniform distributed: sobol sequences
上傳時間: 2016-11-14
上傳用戶:diets
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.
標簽: investigated Abstract-In autonomous resistors
上傳時間: 2014-06-09
上傳用戶:h886166
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.
標簽: Telecommunications Regulation
上傳時間: 2020-06-01
上傳用戶:shancjb
低成本和高可靠性是離線電源設計中兩個最重要的目標。準諧振(QuaSI resonant) 設計為設計人員提供了可行的方法,以實現這兩個目標。準諧振技術降低了MOSFET 的開關損耗,從而提高可靠性。此外,更軟的開關改善了電源的EMI 特性,允許設計人員減少使用濾波器的數目,因而降低成本。本文將描述準諧振架構背后的理論及其實施,并說明這類反激式電源的使用價值。
標簽: 電源
上傳時間: 2021-11-23
上傳用戶:
本文以感應加熱電源為研究對象,闡述了感應加熱電源的基本原理及其發展趨勢。對感應加熱電源常用的兩種拓撲結構-電流型逆變器和電壓型逆變器做了比較分析,并分析了感應加熱電源的各種調功方式。在對比幾種功率調節方式的基礎上,得出在整流側調功有利于高頻感應加熱電源頻率和功率的提高的結論,選擇了不控整流加軟斬波器調功的感應加熱電源作為研究對象,針對傳統硬斬波調功式感應加熱電源功率損耗大的缺點,采用軟斬波調功方式,設計了一種零電流開關準諾振變換器ZCS-QRCs(Zero-current-switching-QuaSI-resonant)倍頻式串聯 振高頻感應加熱電源。介紹了該軟斬波調功器的組成結構及其工作原理,通過仿真和實驗的方法研究了該軟斬波器的性能,從而得出該軟斬波器非常適合大功率高頻感應加熱電源應用場合的結論。同時設計了功率閉環控制系統和PI功率調節器,將感應加熱電源的功率控制問題轉化為Buck斬波器的電壓控制問題。針對目前IGBT器件頻率較低的實際情況,本文提出了一種新的逆變拓撲-通過IGBT的并聯來實現倍頻,從而在保證感應加熱電源大功率的前提下提高了其工作頻率,并在分析其工作原理的基礎上進行了仿真,驗證了理論分析的正確性,達到了預期的效果。另外,本文還設計了數字鎖相環(DPLL),使逆變器始終保持在功率因數近似為1的狀態下工作,實現電源的高效運行。最后,分析并設計了1GBT的緩沖吸收電路。本文第五章設計了一臺150kHz,10KW的倍頻式感應加熱電源實驗樣機,其中斬波器頻率為20kHz,逆變器工作頻率為150kHz(每個IGBT工作頻率為75kHz),控制孩心采用TI公司的TMS320F2812 DSP控制芯片,簡化了系統結構。實驗結果表明,該倍頻式感應加熱電源實現了斬波器和逆變器功率器件的軟開關,有效的減小了開關損耗,并實現了數字化,提高了整機效率。文章給出了整機的結構設計,直流斬波部分控制框圖,逆變控制框圖,驅動電路的設計和保護電路的設計。同時,給出了關鍵電路的仿真和實驗波形。
上傳時間: 2022-06-22
上傳用戶: