band spreading 中文意思是什麼

band spreading 解釋
帶狀撒布
  • 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;...
  • spreading : 就偵察線散開
  1. A parametric psychoacoustic model based on critical band rate, level - dependent spreading function, non - linear superposition and forward masking was proposed

    摘要提出了基於臨界頻帶率、依賴于強度的擴展函數、非線性迭加和前向掩蔽效應的參數心理聲學模型。
  2. By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading

    結合理論和實驗模擬結果,分析討論了衛星通信中的各種恆包絡調制技術,對它們的調制原理,相位路徑,已調波包絡,功率譜密度,誤碼性能,以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。
  3. The transmitter does the work of a burst transmission, its encoding and framing are all implemented in the link control part, the base - band process part does the spreading, fir filtering and up frequency conversion

    發射機實現一個突發傳輸過程,編碼和組幀都在鏈路控制部分實現,基帶處理部分做擴頻、 fir濾波和上變頻的工作。
  4. From the research of ijf - oqpsk, we draw the conclusion that, compared with bpsk, qpsk and msk modems, in the band - limited and non - linear channel, it has nearly constant envelope, less spectral spreading, better pe performance and the less interference of the adjacent channel, et. so, it is more suitable for the satellite communication channel

    通過對ijf ? oqpsk的分析研究可知,它相對于傳統的bpsk和qpsk調制方式,在帶限非線性通道下,具有包絡近似恆定,頻譜擴展小, eb no惡化小,對鄰道產生干擾弱等優點,因而它更適合於衛星通道。
  5. The key purpose of the subject is in order to validate the feasibility of dds / pll in the spreading band

    其主要目的是驗證dds / pll在頻帶擴展方面的可行性。
  6. Supposing chaotic ds - spread spectrum signal bandwidth is equal to the fh slot spacing, the bit error rate formula is derived, and its performance is evaluated and simulated assuming the worst case of jamming strategy. the results show that, in some cases, the addition of chaotic ds spreading to fh system, without increasing total system bandwidth, can improve significantly the system ' s resistance to partial band multitone jamming

    對最惡劣條件下系統的抗干擾性能進行了模擬研究,結果表明,在某些情況下,在慢跳頻系統中,加入混飩直擴成分,即使不增加系統帶寬也能有效地改善系統對抗部分頻帶多頻干擾的能力。
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