通道序號 的英文怎麼說
中文拼音 [tōngdàoxùháo]
通道序號
英文
channel position-
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。Based on the dsp development board, the author finishes the hardware debug about the multi - channel buffered serial port ( mcbsp ) receiving the output signal from the gps if collector and resolves the software program of the receiving buffer of the multi - channel synchronous serial data, data integration, udp datagram encapsulation and network interface driver, etc. the real - time udp datagram receiving, data frame de - encapsulation and high speed data memory are implemented, and a friend application interface with windows message is developed on the pc
基於dsp開發板，作者完成了dsp的多通道緩沖串口（ mcbsp ）接收gps中頻接收機輸出信號的硬體調試，並解決了多通道同步串口數據的接收緩沖、數據合併、 udp數據報裝幀及網路介面驅動等軟體編程。在pc端，通過mfc的網路應用開發類casyncsocket實現udp報的實時接收、數據解幀譯碼、高速存貯，利用windows消息機制開發了應用程序友好界面。Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper, carried on intact summing up to the data in the system, having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram, give solution that many pieces of sdram works togetherses of realizing heavy capacity, designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus, optimize back end state machine design and urge procedure making with lower, giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices, due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal, method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo
本文首先對數字減影血管造影（ dsa ）成像系統的組成結構和數據流向進行了深入研究和分析，並對系統中的數據流向進行了完整的歸納和總結，給出了x線數字成像系統中的高速大容量數據通道的設計方案；在對sdram的控制方式做了深入探討后，給出了實現大容量多條sdram共同工作的解決方案，在此基礎上設計了大容量幀存板實現對圖象數據進行高速存儲；通過對pci總線介面的深入研究，優化後端狀態機設計和低層驅動程序開發，給出了完整的pci介面方案實現高速dma數據傳輸，完全可以滿足視頻傳輸要求；深入研究了基於大規模可編程器件的數字系統設計方法，針對通用fifo使能信號漂移、輸出數據難于建立和保持等設計難點，提出了利用fpga中的鎖相環提供多個時鐘相移的信號來提高系統穩定性的解決方案，從而實現利用fifo來協調系統各模塊之間的數據高速傳輸。First the paper introduces the composition of vxi measurement system both hardware and software. second the paper introduces the amc2320 8 - channel parallel daq module, including hardware components, drive functions and means to develop application programs with them, the specifications such as precision
本文介紹了vxi總線測試系統的軟硬體組成，簡要說明了amc2320八通道并行數據採集模塊的硬體組成和驅動函數，以及用戶如何利用廠家提供的驅動函數編寫自己的應用程序，重點是測試這個模塊的性能指標，包括精度、輸入信號的頻率范圍。Filter poly - phase decomposition method is adopted in this dissertation. the partition of the tuning channel according to the digital mixing sequence, and the digital down - conversion by means of decimating first, the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal
本文採用濾波器多相分解方法，按數字混頻序列劃分調諧通道，使用先抽取，后低通濾波，再混頻的數字下變頻結構，高效實現了變載頻帶通信號數字下變頻。Based on piecewise linear model, this paper proposes an estimation method that first estimates the slope of linear variant and the channel impulse response at the middle time of the current ofdm symbol using pilot sequences, and then estimates the whole channel impulse response through the estimated parameters
該演算法首先利用導頻序列估計出當前ofdm符號間隔內通道線性變化的斜率和中間時刻通道的沖激響應值，然後根據線性模型利用估計出的參數得到當前符號間隔內所有時刻上的通道沖激響應。The algorithm have the good one - way property, high sensitivity to initial values and good security due to the intrinsic characteristic of chaotic system and rijndael algorithm. the simulation experiment demonstrates the convenience and good hash performance ; 3 ) a new scheme of digital voice secure communication was proposed based on chaotic modulation without additional synchronization. the modulation sequence generated by chaotic logical mapping was used to encrypt the digital voice signal
混沌系統和rijndael演算法的固有特點使該演算法具有較好的安全性、對初值有高度的敏感性以及較好的單向性能，並且易於實現，是一種有效的單向hash函數； 3 ）研究了一種無需同步的基於混沌調制的數字語音保密通信系統的方案，利用邏輯映射產生混沌調制序列，以該序列作為密碼對數字語音進行加密處理，為了更好的隱匿信號特徵，混沌調制在小波分解的基礎上，對不同的通道使用不同的參數進行，並借鑒混沌掩蓋對信息信號進行了限幅處理，使密文完全隨機化。The selection of the pn sequence is very important because it influences the quality of the channel measurement directly. so it is discussed in this paper. because this system is a set of software radio, that is to say that the system is based on the pc platform and all other function is implemented by programming, so the selection of correlation fast algorithm, which is used in receiver frequently, is also very important
本文對直序擴頻技術進行了系統地研究，對其中偽隨機碼的選擇直接影響到通道測量的質量的問題進行了討論，因為本系統是一套軟體無線電，即以pc機為平臺，其他的功能都由軟體編程完成，所以對信號接收中大量使用的相關的快速演算法的選擇也至關重要。Multifocal visual electrophysiology examining system is designed by erich. e. sutter recently, which records retinal bioelectric response to light stimulus. he stimulated different retinal regions by graphics and, at the same time, recorded mixed signals of response by a common electrode
他利用圖形刺激器分別刺激視網膜的多個不同部位，用一個通道的常規電極紀錄多個不同部位的混合反應信號，再經計算機程序處理，把對應于各部位的波形提取出來，並用一立In order to reducing isi recovering transmitted signal equalizer have to be used in the reciever. because blind channel equalizer can reduce the intersymbol interference without the assistance of the transmitted sequence, it has been becoming a very popular research topic in recent years
盲均衡器由於不需要訓練序列，僅利用接收信號的統計特性就能對通道特性進行均衡，消除碼間串擾，成為近年來通信領域研究的熱點課題。In this paper, we discuss the principle of mimo - ofdm system based on the introduction of fading channels. furthermore, the channel estimation technique in mimo - ofdm system is investigated, with the emphasis on training sequence - based and pilot - based channel estimation methods, and also several basic and improved algorithms are given respectively. finally, the analysis and comparison of these algorithms is made by computer simulation
本文在分析移動無線通道衰落特性的基礎上，闡述了mimo - ofdm系統的基本原理，並圍繞該系統中通道估計這一關鍵技術，深入研究了基於訓練序列和基於導頻符號的兩類通道估計方法，給出幾種相應的通道估計演算法以及它們的改進演算法，最後結合matlab模擬對這些演算法的有效性和可行性進行了全面地分析與比較。B channel sequence number bsn
通道順序號In the second part, the new method is compared with the old one in such aspects as system structure and signal processing methods. in the third part, the properties of dsss and lfm systems, especially the echo signal correlation processing of the systems are discussed. the last part are the respective analyses of water - pipe simulation experiment results and the trial results in zhong yuan oil field
本文首先介紹了超聲測距的基本原理，分析了通道的聲傳輸特性；接著將傳統液位測量方法和新型液位測量方法的系統構成和信號分析處理方法做比較；然後對系統的發射信號（直接序列擴頻信號和線性調頻信號）的特點進行了研究，並著重討論了回波信號的相關處理；最後對水管模擬實驗測量結果和油田實地測量結果分別進行了分析和討論。Abstract : in this paper, an orthogonal multicode wideband cdma system modelincluding pilot channel based on chaos spreading sequences is given. based on chaos sequences, with pilot channel inserted orthogonally, it is shown that the performance of the system is improved. the performance of the system in fading channel is analyzed
文摘:提出一種基於混沌序列含導頻信號的寬帶正交多碼cdma系統模型，利用混沌序列以及採用正交插入導頻信號提高系統性能，並對此模型在衰落通道中的性能進行分析。The simulation results prove that among the three precoding algorithms, lll precoding strategy demonstrates the best ber performance. and the simulation results also tell us if lll precoding algorithm is combined with the v - blast detection, the performance of the precoding system will be improved by the v - blast lll precoding strategy
與v - blast演算法相結合的格約簡輔助矢量預編碼演算法由於在v - blast中根據當前通道狀態特徵，在預編碼時對信號進行重新排序，因此提高了預編碼性能。Previously, we have constructed a 400mmol / l nacl - treated cdna library of s. salsa and acquired 1000 ests ( expressed sequence tags ) by the large - scale partial sequencing of randomly selected cdna clones. in this research, we isolated a cdna that maybe encode an aquaporin ( s. salsa plasma membrane intrinsic protein, sspip, bf023789 ) located in plasma membrane of s. salsa. then we analyzed the sequence characterizations, genomic structures and transcriptional levels under salinity stress
本實驗室構建了400mmol lnacl處理的鹽地堿蓬（ s . salsa ）地上組織的cdna文庫，隨機挑取單克隆進行測序，獲得了可能編碼鹽地堿蓬質膜水通道蛋白（ s . salsaplasmamembraneintrinsicprotein ， sspip ）的cdna ，其序列號為bf023789 。Chan, li, wong were used to represent the six lanes at the control point. messages like " mr. chan will join you for tea at 3 : 00 pm " would be left at pagers, meaning that lane number one, codenamed " mr. chan " was manned by an " insider ". similarly, " mr. li " would represent lane number two
他們用六個中國姓氏如陳李黃等，順序代表一至六號關卡，再在傳呼機留下如陳先生約你下午三時飲茶的口訊，陳先生即代表一號關卡，亦即示意這條通道乃由自己人駐守李先生代表二號關卡，如此類推。At present, most of the estimation algorithms are implemented by the training sequence by which the characteristics of the sequence was known by the receiver. maximum likelihood estimation or the projection of training sequence is frequently used to estimate the snr. but these techniques will increase the complexity of the reciever
現在所提出的估計演算法大多數是基於發送訓練序列的方法，即傳送完全已知的信號序列，然後通過對此序列的接收和分析來估計通道參數，如利用訓練序列的最大似然估計，或利用其投影來估計通道參數的方法，但是這些利用訓練序列的估計方法都存在增加設備復雜度的缺點。Assigning serial different address code to different subscribers, useful signal is taken out of the same time slot and frequence, and is transmitted with one share channel. at received end, system makes use of completed address code from sending end to do correlative check and take out useful subscriber signal. the other address code signals are treated as broadband disturbing signal which is removed. in radio environment of existing variable disturbtion and muti - way declining, expand frequence signal ’ s broadband characteristics can improve system performance obviously. cdma mobile telecommunication system has some better characteristics, such as anti - disturbing 、 anti - way declining 、 secrecy 、 capacity 、 utilizing rate of frequence resource and so on, than other mobile telecommunication system
Cdma （ codedivisionmultipleaccess ）移動通信系統的技術基礎是基於擴頻技術的碼分多址，通過給不同的用戶分配各自特定的地址碼序列，將處于相同時隙和頻率的用戶信號分離開來，採用共享通道方式傳輸信息。在接收端，系統利用與發送端完全一致的本地地址碼對接收信號進行相關檢測，提取需要的用戶信號，而將其他使用不同碼型的信號視為寬帶干擾而從中剔除掉。Then critical technologies of simulation system are discussed, including frame processing structure, fh sequence generator, simulation models of path loss and multipath channel, simulation of signal propagation delay and jamming signal etc
其次，討論了模擬系統實現的關鍵技術，包括幀處理結構、跳頻序列發生器、路徑損耗與多徑通道模擬模型、信號傳播延時及干擾信號的模擬等。分享友人