main channel signal 中文意思是什麼
main channel signal
解釋
主通道信號-
The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part
本文所作的主要工作及研究成果主要有以下幾個方面： （ 1 ）對自導工作過程中的信號與信息處理的基本理論與方法進行了較為全面的研究，為建立一個較為完備的自導模擬系統提供了理論基礎； （ 2 ）討論了自導系統工作過程中海洋通道對目標回波信號與目標輻射噪聲信號等的影響，建立回波信號的數學模型、環境場中的噪聲信號模型（包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等）與海洋混響模型，模擬產生了聲自導系統基陣接收到的回波信號與噪聲信號； （ 3 ）深入研究並建立了自導模擬系統的總體框架，給出各個具體功能模塊組成，討論了聲自導系統對信號的時域與空域處理，並結合模擬程序中陣列信號處理模塊，給出固定多通道波束形成的模擬實現過程； （ 4 ）根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體，通過網路與控制系統相連，組成完整的魚雷模擬器。 -
The main cause of signal ' s decrease in infrared channel of spacecraft flying remote sensing instrumentation is water vapor deposition on the surface of low temperature optical instruments which released from materials
摘要空間遙感儀器紅外通道的信號衰減，人軌初期的主要原因是由於材料釋放的水汽在低溫光學窗口表面沉積，導致紅外透射率降低所致。 -
According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system
針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。 -
Considering practical needs and developing trend of vts, based on analyzing the signal characters of vts radar video, studying basic data compression principles in information theory, comparing international coding standards in the forefront of image processing, a vts radar video coding system suitable for transmission in the narrow channel is proposed in this thesis. its main block ? oder and decoder, is realized in the common pc with software. the working process is demonstrated detailed
結合vts系統的現實要求和發展方向，本文從vts雷達原始視頻圖像數據的特點出發，從信息論中關于數據壓縮的基本原理出發，從現代信號處理特別是圖像信息處理領域中的壓縮編碼國際標準出發，提出了雷達原始視頻編解碼系統方案，其主體部分? ?編解碼器是在pc機內利用壓縮軟體實現，闡述了系統工作流程；提出了基於jpeg壓縮演算法和h -
The multistage constant modulus ( cm ) array is a cascade adaptive beamforming system that can recover several narrowband co - channel signals without training. the main idea of the smi - cma is to use smi to determine the initial weight for cma operation. the method can come up with the desire signal in despite of the interfering signal is stronger than the desire signal
基於以上考慮，我們提出了基於smi - cma聯合自適應方法，該演算法可以分離多個同通道信源，由smi演算法決定cma演算法的初始權向量，在干擾信號較強時，仍有穩定的sinr輸出，具有較快的收斂速度。 -
The deducing of the algorithms has very practical value in state estimation for systems under the complex environments. in the instance of complicated multi - channel system with multiplicative noise, the dissertation discusses the optimal estimation of state filtering and smoothing and the stochastic input signal with the technique of innovation and projection theorem of hilbert space. the main study of the dissertation is introduced as follows : 1 according to the practical requirement of complicated multi - channel system with multiplicative noise, the dissertation broadens rajasekaran filtering algorithm
本文針對復雜多通道帶乘性噪聲系統，應用新息的方法和hilbert空間的投影定理，對狀態最優濾波和平滑估計、隨機輸入信號的最優估計等理論與應用方面的問題，進行了進一步的探討，著重完成了以下工作：第一，根據復雜多通道乘性噪聲系統問題的實際需要，推廣了rajasekaran濾波演算法。 -
Theoretical analysis and computer simulation prove that the scheme can overcome the signal effect and improve the anti - jamming ability of radar system. then as to the polarization radar, a scheme that deploys omnidirectional two - orthogonal - channel antenna array besides the main antenna is proposed
理論分析與模擬均驗證了，與常規旁瓣對消系統相比，該思路可以有效抑制目標效應，改善雷達系統的抗干擾性能。 -
Noise and interference are inevitable in radar channel. they enter the received system through side or main beams, and reduce the system ’ s receiving signal - to - noise ratio ( snr )
在雷達通道中，不可避免地存在著噪聲和干擾，它們通過天線方向圖的邊波束或主波束進入接收系統，從而降低系統的接收信噪比。 -
Harmonic analysis can be produced in as little as 10 milliseconds, or measurements may be integrated over more than a day. the user may set any measurement interval, perform synchronous averaging on harmonics, and even perform full spectrum analysis to detect non - harmonic signal content. the system s main processor controls all display, data storage and i o functions, thus allowing each channel to perform its analysis at maximum speed
在每通道雙數字信號處理器結構中，結果形成超快速諧波分析，諧波分析可於至10毫秒產生，或可綜合測量超過一天，用戶可設定任何測量區間，執行諧波同步平均，及進行全頻譜分析從而探測非諧波信號內容，系統的主微處理器控制全部顯示數據儲存與i 0功能，故使各通道可於最高的速度下進行分析 -
The project is to develop the 100mhz bandwidth, equivalent sampling frequency is 1g / sa, resolution is 8bits, dual signal channel, and delicacy is 5mv - 100v / div per channel, time sweep velocity is 20ns - - 5s / div digital storage oscilloscope ( dso ) 。 achieved equivalent sampling is innovative and main content of the project
本設計的具體目標是實現帶寬為100mhz ，等效采樣率為5gsa / s ，采樣數字解析度為8bit ;雙通道，幅值靈敏度為5mv 100v / div ，時基為: 10ns 5s的手持式數字存儲示波器.等效采樣的實現是本設計的創新點和主要研究內容 -
Increase of unnecessary handoff and unbalance of the teletraffic among different cells. using fuzzy mathematical idea, the thesis proposes a fuzzy pcs ( ffcs ) algorithm, which takes into account of three main factors, i. e. the signal strength of common pilot channel ( cpich ), t
本論文綜合考慮了公用導頻通道（ cpich ）的信號強度、蜂窩的呼叫到達率和基站的可用功率三個主要因素，借鑒模糊數學思想，提出了一種模糊fcs （ ffcs ）演算法，並通過模擬對軟切換、 fcs和ffcs進行了性能比較。 -
Hardware design, the main part of tlle system, stresses the signal regulating methods such as signal amplification, channel choice and am transformation as we1l as the measure of usual parameters such as ac & dc electric parameters, contact resistance, time, temperature and practical signal transform circuit, etc. furthermore, the anticipated functions have been proved by practical use
其中硬體部分主要側重於信號調理即信號的放大、通道選擇、模數轉換以及各測試量包括直流電參數、交流電參數、接觸電阻、時間以及溫度的測試方法以及具體的信號變換電路，並以生產出實際產品的方式驗證了結果。 -
This dissertion majored in dicussing the signal source and signal transmitting channel ’ s code and decoding of spectrum spread radio station under the concept of the software wirelss radio. the author ’ s main work and new ideas are listed blow : 1
本文主要討論的是在軟體無線電的構架下討論和實現跳擴頻電臺的語音編解碼以及通道上的編碼和解碼的理論和實現。 -
The main working contents of this paper is following : 1 according to the theory of electromagnetic induction law, a new radio induction system is proposed based on the traditional radio induction technology, analyzed on its signal transmission character and its frequency spectrum character. the channel composed of the new radio induction system is compared with the parameter - constant channel and the parameter - changing channel. the application of the new radio induction system is studied in converter supply
本文的主要工作內容如下： 1在現有的無線感應技術基礎上，基於電磁感應理論，提出了新型無線感應系統，分析了新型無線感應系統的信號傳輸特性，分析了新型無線感應系統的頻譜特性，把新型無線感應系統組成的通道和恆參通道、變參通道進行了比較，研究了新型無線感應系統在變流器供電中的應用。 -
Adaptive modulation mainly include several problem for example signal shape, channel estimation, all digital receiver and so on. since the channel referring to adaptive modulation is very hostile in wireless transmission channel, its algorithms and architectures used for the modulation and demodulation should be carefully devised and considered. designing appropriate algorithms and architectures of the adaptive modulation are main research goal of this paper to meet the need of flat fading channel and selective fading channel
自適應調制技術主要包括信號成形、通道估計和檢測、全數字接收等方面的問題，由於自適應調制所涉及的通道是非常惡劣的無線傳輸通道，其調制與解調的演算法和結構必須加以精心的設計和考慮，針對具體所假設的平衰落和選擇性衰落的無線通道情況來設計自適應調制系統的演算法和結構是本文研究的主要方向。 -
This paper gives an overview on the development of wireless communication and the orthogonal frequency division multiplexing ( ofdm ) technique. basic characters of wireless channel, transmission principles and signal frame structure design of ofdm are introduced. main non synchronization factors between ofdm transceivers are pointed out
本文介紹了無線通信與多載波正交頻分復用（ ofdm ）技術的發展概況，闡述了無線通道的基本特性、 ofdm的調制解調原理與信號幀結構的設計，指出了導致ofdm收發信機間不同步的主要因素。 -
The characteristic of channel, the mode of modulation and the methods of signal processing are main research contents in plc
本文涉及的電力線載波通信研究，主要有以下三個方面:通道研究、調制方式研究和信號處理研究。
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