block signal system 中文意思是什麼
block signal system
解釋
閉塞信號系統-
In a start - stop teletypewriter system, the significant condition of the signal element that immediately precedes a character signal or block signal and prepares the receiving equipment for the reception of the code elements
在啟動一個電傳打字機系統中，迅速領先字元信號或閉塞信號，並且準備好接收設備為接收代碼元件的信號元件的有效狀態。 -
As the key block of the wireless communication transmitter in rf, it is very useful in improving the output power and efficiency, lowering the loss of the supply, lowering the size and the weight, lengthening the time of communication. class e power amplifier which is suitable to amplify envelop signal is very important in modern communication system
功率放大器（ pa ）作為無線通信射頻發射機中不可缺少的關鍵電路，對于提高手機的功率效率、降低電源損耗、減小體積重量、延長通話時間有著舉足輕重的作用，而適用於恆包絡信號放大的e類功率放大器，更是在現代通信系統中佔有十分重要的地位。 -
The system consists of phantom, signal source block, power amplifier block, measuring mode setting block, high accuracy amplifier and high speed demodulator
該系統包括信號源模塊，功率放大模塊，測量模式設置模塊，信號放大模塊，同步解調模塊。 -
Standards of digital tv broadcast has specified transmitting systems which are based on various medium such as satellite - oriented transmitting system ( dvb - s ), cable - oriented transmitting system ( dvb - c ), terrestrial - oriented transmitting system ( dvb - t ). different system adopts different methods of channel codec, modulation and demodulation, but for signal source block codec, only mpeg - 2 standard has been applied for all the systems. as a compression standard being specified in digital tv broadcast transmission, mpeg - 2 has been widely involved on compression occasion
對于數字電視信號的傳輸，數字電視廣播標準制定出基於多種媒質傳輸的傳輸系統，如衛星傳輸系統（ dvb - s ） ，電纜電視傳輸系統（ dvb - c ） ，地面廣播（ dvb - t ） ，不同的傳輸系統制定不同的通道編碼和調制解調的方法，但是對于所有傳輸系統的信源編碼則一律採用mpeg - 2這一標準。 -
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 -
Moving - like block is a kind of signal system which can ensure running safety and raise transportation efficiency
準移動閉塞是一種既能保證行車安全，又能提高運輸效率的信號制式。 -
The lna is one of the most important and broad components in microwave communication system receiver, and is used to amplify the low level signal. as the first signal processing block after the antenna, the lna determines the noise figure and input voltage swr and greatly impacts the dynamic range
低噪聲放大器（ lna ）廣泛應用於微波接收系統中，是重要器件之一，主要用來放大低電平信號，由於是自天線下來第一個進行信號處理的器件， lna決定了整個系統的噪聲性能和電壓駐波比vswr ，並對動態范圍有著較大的影響。 -
Based on an analysis on the present situation and development of three kinds of signal systems ( the point system based on interrogator responsor, the quasi - moving block system based on digital track circuit and the moving block system based on wireless data transmission ) in urban rail transit, some suggestions on the localization of signal system of urban rail transit are put forward
摘要在分析三種城市軌道交通信號系統制式（基於查詢應答器的點式系統、基於數字軌道電路的?移動閉塞和基於無線數據傳輸的移動閉塞）的現狀和發展基礎上，對實現我國城市軌道交通信號系統國產化提出建議。 -
In term of the orthogonal property of alamouti scheme and the character of the ofdm system equivalent model expression of receiver signal for stbc - ofdm system was obtained by flexible transform method so that the inverse of matrix was avoided using direct - decision mode and the complexity of computation and receiver was decreased. the simulation results show the validity and efficiency of the proposed receiver. ( 6 ) an adaptive equalization algorithm used in space - time block coded ofdm ( stbc - ofdm ) system with alamou
該演算法充分利用了alamouti編碼的正交特性和多發射天線ofdm系統特點，通過靈活的變換對接收信號進行等價的表示；通過對11矩陣求逆的研究，將塊最小二乘遞推演算法（ brl ）中的zkxzk的矩陣求逆分解為k個2x2矩陣的求逆，從而降低了自適應演算法的運算量和接收機的復雜度。 -
Through analyzing the phenomenon of the pseudo complex value in the block - decoupling method, the pseudo complex value is considered as the result of eigenvalue variation because of the system being decoupled forcedly, but this phenomenon has no effect on the result of the small signal stability
對模糊分塊解耦法可能出現的偽復根現象進行分析，認為偽復根是將原本存在機電耦合的子系統強行解耦導致特徵值「變異」的一種現象，一般不會影響小擾動穩定分析的結果。 -
The hardware was divided into basic control system, the input and output of analog signal, and the input and output of digital signal block to design main circuits
硬體分成基本控制系統、模擬量輸入、模擬量輸出、開關量輸入、開關量輸出以及通信等模塊來設計電路。 -
Finally, on the basis of the mpeg - 1 layer hencoding hardware structure, the block of logic communicates with the pc over the parallel port and the interface for flash memory are design. then a mpeg audio coding system, which applies to store audio signal, is presented through the field programmable gate array device technology
最後，在mpeg - 1層編碼的硬體結構的基礎上，結合計算機並口通信和flash存儲器的介面模塊，採用現場可編程邏輯器件fpga技術，最終設計了一種應用於音頻信號存儲的mpeg音頻編碼系統。
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