peak to average ratio 中文意思是什麼

peak to average ratio 解釋
峰值對平均值比
  • peak : vi 1 瘦弱；消瘦，憔悴。2 減少，縮小 （out）。n 1 山峰，山頂；孤山。2 （胡須等的）尖兒；尖端。3 最...
  • to : adv 到某種狀態；〈特指〉到停止狀態；關閉。 ★也常和動詞結合，略去其後賓語，而構成成語： The door i...
  • average : n 1 平均，平均數。2 一般水平，平均標準。3 【商業】海損；海損費用；（給領航的）報酬。adj 1 平均的...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. The ratio of the average power loss to the power loss under peak loading

    平均能量衰減與峰值負荷時能量衰減的比值。
  2. Ratio of peak lamp current to rms or average lamp operating current

    燈電流峰值與rms （均方根值）或平均工作電流的比值。
  3. Frequency - domain equalization. at the same time discusses some key problems in ofdm : high ratio of peak - to - average power of output signals, problem of synchronization, channel estimation, adaptive bit, power and subcarrier allocation. emphasize on channel estimation, and present a new algorithm which can filtering more interpolation errors and noise. for the sake of improve the performance of resist narrowband noise and make efficient use of the spectrum apply malvar wavelet division

    同時就ofdm系統中的一些關鍵問題如峰值平均功率比（ papr ）太高，同步問題，通道估計，通道、比特與功率必須動態分配進行了研究，著重研究了通道估計問題並提出一種改進的方法，能濾除更多的噪聲分量和插值誤差，提高系統的性能；為了提高抗窄帶噪聲的性能和提高通道利用率，用malvar小波變換實現了不等帶寬分配。
  4. Research on reducing peak - to - average power ratio of mc - cdma

    降低峰值平均功率比的研究
  5. This paper deeply research on the synchronization, peak - to - average power ratio, multiuser detection of the current mc - cdma system

    本文深入研究了目前mc - cdma中同步、峰平比、多用戶檢測的問題。
  6. 2. clipping is used to reduce the papr ( peak - to - average power ratio ) of multicarreir gmsk signal. the conclusion is that the moderate clipping introduces small performance degradation

    採用削波方法來降低多載波gmsk信號的峰平比，結論是中等程度的削波只引起系統性能的略微下降。
  7. One of the major drawbacks of ofdm system is that the ofdm signal of the transmitter can have high peak - to - average power ratio ( papr ), which limits ofdm ’ s wide applications

    但是ofdm系統的一個主要缺點就是發送端的傳輸信號具有較大的峰值平均功率比（ papr ） ，這限制了ofdm技術的廣泛應用。
  8. An optimal algorithm for reducing the peak to average power ratio of ofdm signal

    信號峰值平均功率比的優化演算法
  9. At the same time, a simple channel estimator that can suppress the peak - to - average power ratio ( papr ) for ofdm system with multiple transmitter antennas is proposed, its simulation proves again the result. ( 5 ) ofdm receiver is proposed with multiple transmitter antenna and alamouti scheme

    結果表明，多個獨立天線ofdm系統的性能明顯優于單天線的ofdm系統；同時還給出了一種簡單的能有效抑制峰值功率平均功率比（ papr ）且適于多發射天線ofdm系統的導頻符號輔助的通道估計方法，模擬結果再次證明了上述結論。
  10. Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity. these applications include not only system performance improvement, but also reduction of the peak to average power ratio in mimo - ofdm systems. under these backgrounds, this paper first studies space - time block codes under the single carrier, flat fading situation, discusses the encoding / decoding principle and its performance under different channels. then, the author focused on the performance of space - time codes under time selective and frequency selective channels, uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation

    在上述背景下，本文以單載波，平坦衰落通道下的空時分組碼為切入點，深入分析了其編譯碼原理和在不同通道情況下的性能;以此為基礎，後文展開了對空時分組碼在多載波，時間選擇性和頻率選擇性衰落通道下的性能研究，通過理論推導和充分的模擬，揭示了空時/頻分組碼在時頻選擇性衰落通道中的性能變化的根本原因;在以上對多載波系統中空時分組碼的研究的過程中，作者發現了空時分組碼在降低系統峰平比方面應用的可行性，提出了一種降低峰平比的新方法。
  11. Capacity and performance of mobile radio systems essentially depend on the choice of the multiple access scheme. a novel and promising wireless digital modulation / multiple access technique called multicarrier cdma is studied in this thesis, including reducing the peak - to - average ratio, which is one of its key techniques. mc - cdma is combination of ofdm and cdma, thus advantages of both techniques are exploited

    移動通信系統的容量和性能在很大程度上取決于多址方案的選擇，本文主要討論了在通信領域新興的擴頻多址方式一多載波cdma （ mc - cdma ） ，並對降低mc - cdma系統峰值平均功率比這一關鍵技術進行了研究。
  12. This dissertation researches on wavelet theory applied to information transmission, including cdma spreading code design, waveform coding in digital modulation, over - saturated multi - access communication, diversity techniques for multi - path fading channels, and peak - to - average power ratio ( papr ) reducing methods for the wavelet packet modulation signals, etc.

    本文以子波理論為工具，較深入地研究了通道傳輸方面的幾個問題，內容包括cdma擴展碼的設計、數字基帶波形成形技術、過飽和多址通信、克服衰落的分集技術和減小子波包調制信號的峰值功率/平均功率比值的方法等。
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