narrow band modulation 中文意思是什麼
narrow band modulation
解釋
窄帶調制- narrow : adj 1 狹 窄 狹隘的 狹小的 （opp broad wide）。2 有限的 受限制的；有偏見的 氣量小的 心眼兒窄的；眼...
- band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
- modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
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The above waveforms discussed are to synthesize the wb or uwb with narrow band pulses. assuming the transmitting uwb linear frequency modulation ( chirp ), dechirp processing is introduced, and the method involved to obtain high resolution by reducing the if bandwidth is presented. furthermore, dechirp processing used to sar imaging is discussed, and the processing steps are described
< wp = 4 >以上研究的兩種信號形式都是通過窄帶子脈沖串相參合成的方法來獲得超寬帶回波信號，本文還探討了去斜率（ dechirp或stretch ）方法，分析了去斜率降低接收機中頻帶寬、 fft獲得目標一維距離像的原理，並探討了線性調頻去斜率合成孔徑雷達成像，給出了具體實現步驟。 -
The principles of adaptive star - qam and the optimum constellation of star qam are given. in adaptive single - carrier modulation, a blind modulation detection algorithm based on higher order cumulants ( hoc ) for aqam and apsk is proposed. the excellent detection performance of algorithm is evaluated in gaussian and narrow - band rayleigh fading channel
對自適應單載波和多載波調制中的調制方式盲檢測演算法進行了研究；在自適應單載波調制中，研究了窄帶通道下的aqam調制原理和aqam調制最佳星座圖結構；在rayleigh通道下和高斯通道下，提出一種基於高階累積量的aqam和adpsk調制方式盲檢測演算法，演算法具有良好的檢測性能。
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