upper antenna 中文意思是什麼
upper antenna
解釋
上天線-
The antenna test turntable automatic test system used the multi - machinecollecting and distributing controlling mechanisms in this article. the lowerposition machine realized the real - time control of the electrically controlledsystem and the goniometric system, keeping the communication with the upperposition machine, and fed back the turntable condition information, and so on ; the upper position machine realized the data acquisition of the various axialangles, the transmission of the control command and the monitoring of thecurrent turntable running status, and so on
本文所研製的天線測試轉臺自動化測試系統採用的是多機集散控制機制? ?下位機實現對轉臺電控系統、測角系統實時控制並保持與上位機通信以及反饋轉臺狀態信息等工作;上位機實現轉臺各軸角度數據採集、控制命令發送以及監視當前轉臺運行狀態等工作。 -
To begin with, the influence that plane scanning error has on the far field is analyzed and the upper boundary of the error is formulated. and then this paper uses the taylor series expansion to correct the probe positioning error in antenna near - field measurement
根據平面波譜理論，推導了平面掃描位置誤差對遠場的影響，給出了位置誤差上界的數學表達式，並用泰勒級數展開法對其進行了修正。 -
The authors discuss the statistical distributions of multiple - input multiple - output mimo channels over flat rayleigh fading via the order statistics analysis. simplified expressions are derived for expectations of the vector energies when the column or row number is equal to 1 and 2, which is followed by the upper and lower bounds when the antenna number at one side approaches infinite
以順序統計量分析rayleigh平坦衰落mimo通道矩陣各向量能量的分佈特徵，給出其各階矩公式以及列行數為1和2時行列向量的能量期望值的簡潔表達式，並由此推導出通道矩陣的單邊維數趨于無窮時行和列向量能量期望值的上下界。
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