channel access code 中文意思是什麼

channel access code 解釋
通道訪問碼
  • channel : n 1 水路,水道,渠,溝;海峽;河床,河底。2 (柱等的)槽,凹縫;【機械工程】槽鐵,凹形鐵。3 〈比...
  • access : n. 1. 接近;會面。2. 捷徑,門路〈指方法、手段〉;檢查孔;進路,入口;【自動化】(存貯器的)存取。3. (病的)發作;(怒氣等的)爆發。4. 增加。
  • code : n 1 法典;法規。2 規則,準則;(社會、階級等的)慣例,習俗,制度。3 (電)碼,代碼,密碼,暗碼;...
  1. Is - 95, a wireless digital cellular standard based on cdma ( code division multiple access ), adopts convolution code as its channel coding part. the third generation wireless cellular standard adopts turbo coding, which stems from convolution coding, as its channel coding part

    以cdma ( codedivisionmultiplexaccess )為基礎的數字蜂窩標準is - 95採用卷積碼作為其糾錯方案;第三代數字蜂窩無線通信標準也採用并行級聯卷積碼( turbo碼)作為其糾錯方案。
  2. In this paper, after introduction of the code division multiple access ( cdma ) and orthogonal multicarrier ( mc ) technique, the system model of mc - cdma is analyzed and the bit error rate ( ber ) performance in downlink and uplink channel is shown in awgn channel by computer simulation

    本文在碼分多址技術和正交多載波技術原理基礎上,分析了高斯白噪聲通道中多載波碼分多址( mc - cdma )系統的數學模型,並且使用不同的擴展碼對下行通道和上行通道誤碼率性能分別作了計算機模擬分析。
  3. Uplink space - time channel blind estimation for space - time coded multicarrier code division multiple access systems

    空時編碼多載波碼分多址系統上行空時通道盲估計
  4. Proposes a novel channel estimation algorithm for multi - carrier code division multiplex access ( mc - cdma ) systems on the uplink

    摘要提出了一種新穎的適用於多載波碼分多址接入( mc - cdma )系統上行鏈路的通道估計演算法。
  5. Based on ica post processing matched filter multi - user detection lets the output of traditional matched filter to initialize the ica iterations, not only the known spread information of interesting user is used to overcome the uncertainness of ica, but also the character of statistical independence is used. the simulation results show that it advances the ability of traditional detector when the signal - noise - ratio is large. keywords code division multiple access ; independent component analysis ; channel estimation ; matched filter ; blind multi - user detection

    基於ica后處理的匹配濾波多用戶檢測是用傳統的檢測器的輸出來初始化ica的迭代,它不但充分利用多用戶信號的已知信息,克服了ica的不確定性問題,同時也充分利用了多用戶信號的統計獨立性,模擬實驗結果證明這種多用戶檢測演算法在高信噪的情況下,誤碼性能改善隨著信噪比的提高不斷增加。
  6. The problem of signal processing for direct - sequence code - division - multiple - access ( ds - cdma ) signal over multipath frequency - selective mobile channels is considered. a new blind receiver is proposed. without the knowledge of the multiple - access interference users spreading code and the channel characteristics, the receiver achieves blind detection with prior knowledge of only the desired users spreading code and approximate timing. by using reduced rank adaptive decorrelating filter and adaptive multipath combiner which is based on decision - directed algorithm, the receiver gets the ability to combat both fading and the near - far effect at low cost. simulation results demonstrate that the proposed receiver offers high performance

    本文研究多徑頻率選擇性衰落通道下直接序列擴頻碼分多址( ds - cdma )信號的處理問題,提出了一種新型的盲接收機.該接收機不需預知多址干擾用戶的擴頻碼,不需預知通道參數,只需已知期望用戶的擴頻碼和粗略的定時,就可以完成用戶的盲檢測.同時,該接收機通過降維自適應去相關濾波和基於判決指導的自適應多徑合併,來獲得低成本和良好的抗衰落、抗遠近效應性能.模擬結果驗證了本文提出的接收機的優良性能
  7. Cdma ( code division multiple access ) technology is used in communication system abroad because of its merit, people use cdma technology to transmit data, image and also other different information in different sub - frequent bands of a broad channel. so a research, which combines multi - carrier signal processing and cdma technology and processes different sub - frequent bands signal at same time, is full of practicable value

    Cdma技術由於其優點被廣泛採用在通信系統中,人們在一個寬帶通道的不同子頻段上使用cdma技術傳輸數據、圖像等不同信息,所以將多載波信號處理與cdma技術聯系起來進行研究,並且同時將不同的子頻帶信號進行處理是一個很有實用價值的問題。
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