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telemetry
相关语句
  遥测
    A Study on Application of Telemetry Transmitter to Missile with Phase Locking Technique
    锁相技术在弹上遥测发射机中应用的研究
短句来源
    FM Deviation and Nonlinear Measurement of S-Band Telemetry Transmitter
    S波段遥测发射机调制频偏及非线性测量
短句来源
    The Miniature S-band Telemetry Transmitter on Missile
    小型化S-波段弹上遥测发射机
短句来源
    A Technology of Mounting Airborne Telemetry Transmitting Antenna
    机载遥测发射天线的安装技术
短句来源
    A Technical Study on FM Locked in Phase of 2 Mb/s Telemetry Signal
    2 Mb/s遥测信号的锁相调频技术研究
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  “telemetry”译为未确定词的双语例句
    ABOUT THE COMPARISON OF QPPM-ASK TELEMETRY SYSTEM'S CHARACTERISTICS WITH PCM-PSK SYSTEM'S
    关于QPPM—ASK与PCM—PSK二种遥测系统的性能比较
短句来源
    A WAM-FM TELEMETRY SYSTEM
    WAM—FM遥测系统
短句来源
    A WAM-FM TELEMETRY SYSTEM
    WAM-FM遥测系统
短句来源
    NEW SCHEME OF 21 CHANNEL CONSTANT BANDWIDTH FREQUENCY DIVIDED MULTIPLEX TELEMETRY SYSTEMS
    21路等带宽频分制遥测系统的新方案
短句来源
    Second New Development of Optimum PCM Group Synchronization Codes (N = 43 to 54) for PCM Telemetry/Remote-Control Systems
    最佳PCM群同步码研究的第二批新成果(N=43~(54))
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  telemetry
zanthopygia) are measured by radio telemetry in a subalpine forest near Beijing, China.
      
Consideration was given to the combinatorial hierarchical design (composition) of the structure of an application telemetry system consisting of the on-board, radio, and ground communication equipment including the operator working place.
      
The technique of processing is verified using the telemetry data on angular velocity of the station and its attitude parameters.
      
In the first method the acceleration was calculated using the relative motion of the station reconstructed on the basis of telemetry data.
      
The measurements were carried out in the real-time mode of data transmission to the Earth, when the orbital station flew over the telemetry data receiving point.
      
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An experiment of 16 channels sequency division mult plex (SDM) system has bsen completed by the RF earner channel for the transmission of telemetry signals. Through th3 bandlimited carrier channel the Walsh subcarrier becomes the pulse waves with front and lagging edges, that will causes the orthogonal error between subcarriers. By using a switch in proper time, the front and lagging edges of pulse can be cut off, so that the seperated Walsh subcarriers are obtained, they are the orthogonal functions too....

An experiment of 16 channels sequency division mult plex (SDM) system has bsen completed by the RF earner channel for the transmission of telemetry signals. Through th3 bandlimited carrier channel the Walsh subcarrier becomes the pulse waves with front and lagging edges, that will causes the orthogonal error between subcarriers. By using a switch in proper time, the front and lagging edges of pulse can be cut off, so that the seperated Walsh subcarriers are obtained, they are the orthogonal functions too. By means of this processing the orthogonal error of the 16 channels system in a carrier channel possessing bandwidth 320KHz can be neglected. On the other hand, the main source of error is caused by the nonlinearity of the RF carrier channel, as a result, the greatest crosstalk is less than 5%,generally speaking, it is satisfactory to eng'neering. Thus, the SDM, as a multiplex system parallel to FDM and TDM, can be perfectly applied to telemetry.

本文介绍一个在一般遥测用射频信道上实现16路沃尔什复用(序率分割复用)系统(SDM)的实验。沃尔什函数作为付载波经带限信道后其波形要产生上升、下降沿,这将导致各路间的正交误差。为此引进间断开关将脉冲上升下降沿部分切除,得到间断沃尔什付载波,它仍是一组正交函数。这样在视频带宽320KHz的通道上传输16路沃尔什多路信号时其正交误差可忽略不计。而误差的主要来源是射频通道非线性引起的交叉干扰,但在目前射频通道的一般水平上交叉干扰最大值小于5%,这已满足一般的工程要求。因此SDM作为一个与FDM和TDM相平行的多路复用系统是完全能用于遥测中的。

In the recent two years, there is a contention among domestic telemetry circles on the characteristic (energy efficiency) of two kinds of telemetry systems: QPPM-ASK and PCM-PSK. The point at issue is how to calculate the eguivalent probability of error bit Peb. The aim of this paper is to calculate the Peb more exactly, get corres-ponding conclusion and explain that it is coincident with the fundamental theorem of communication-Shanon theorem.

近二年来,国内遥测界正在就QPPM—ASK与PCM—ASK二种遥测系统的性能(能量效率)优劣问题开展讨论,问题争论的焦点在于怎样推算QPPM—ASK系统的等效比特误码率Peb。本文的目的就是要正确推算出此误码率Peb,并在此基础上得此相应的结论,最后说明此结论是符合通信的基本定律—山农定律的。

According to the theory of orthogonal multiplex, frequency division multiplex (FDM) and time division nultiplex (TDM) are called orthogonal multiplex. Frequecy division and time division are not tbe only two multiplex methods which satisfy the orthogonal condition. Walsh functions were introduced by an American mathematician J.L. Walsh in 1923. They are orthogonal and complete. In this paper a telemetry system based on Walsh functions is theoretically proprosed, the system is called sequency division multiplex,...

According to the theory of orthogonal multiplex, frequency division multiplex (FDM) and time division nultiplex (TDM) are called orthogonal multiplex. Frequecy division and time division are not tbe only two multiplex methods which satisfy the orthogonal condition. Walsh functions were introduced by an American mathematician J.L. Walsh in 1923. They are orthogonal and complete. In this paper a telemetry system based on Walsh functions is theoretically proprosed, the system is called sequency division multiplex, or SDM. The experimental results show that the schema is reasonable. The design idea, block diagram, operational principle and technical problem are diseassed in detail. The laboratory Prototype is a WAM-FM system. In order to show the advantage and potentiality, it is compared with FDM. The new system has not only the academic value, but also has the practical value.

根据正交分割理论,现在流行的频率分割制(FDM)和时间分割制(TDM)都属于正交分割的范畴。满足正交条件的信号不仅仅只有频分和时分两种形式。1923年美国数学家沃尔什(WALSH)提出的沃尔什函数就是一种正交完备的函数系。本文在理论上提出了一种以沃尔什函数为基础的序率分割制(SDM),并以实验证明了新方案可行。文中详细地介绍了这种SDM系统的设计思想、方框图、工作原理以及具体实施中的技术问题。实验室研制成的样机是沃尔什调幅—调频制的,称为WAM—FM遥测系统。为了阐明新系统的优越性及其潜力,把它与现行的频分遥测系统作了简单的比较。说明新系统不仅具有一定的学术价值,而且具有一定的实用价值。

 
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