mud multi-user detection 中文意思是什麼

mud multi-user detection 解釋
多用戶檢測
  • mud : MUD ＝multiuser domain 【計算機】多用戶空間。n 泥 泥漿；泥淖；沒價值的東西；污物；〈美俚〉咖啡 巧...
  • multi : 並聯的，多路系統
  • user : n. 1. 使用者，用戶。2. 吸毒成癮者。n. 【法律】（財產等的）使用（權），行使（權），享受（權），享有（權）。
  • detection : n. 1. 探知；發現，發覺；敗露。2. 【化學】檢定，檢查；【電訊】檢波。
  1. Verdu derives the ideal of multi - user detection in 1986. the multiple access interference, he deemed it has available information in certainly structure. adopted by the mlsd in the theoretical, it has many good abilities, such as its capability close with the single user ' s, near - far resistance, raised the capacity of the system. thereby come to operate the mud ' s research

    1986年， verdu提出了多用戶檢測思想，認為多址干擾是具有一定結構的有效信息，理論上證明了採用最大似然序列（ mlsd ）可以逼近單用戶接收性能，並有效地克服了遠近效應，大大提高了系統容量，從而開始了對多用戶檢測的研究。
  2. Cdma has become the main technology of the third generation mobiletelecommunication. many users in cdma system are distinguished by differentspread sequences and have the same time chip and frequency unlike in theconventional tdma system or fdma system. but the practical spread sequences cannot reach the ideal condition, the correlation function equals zero, so that it will causethe multiple access interference ( mai ) when lots of people are communicating. multi - user detection ( mud ) makes joint detection on the received signals by makingfull use of the information of all users ’, which relaxes mai and increases the capacityof system

    Cdma技術已經成為第三代移動通信系統中的主流技術，它與傳統的fdma 、 tdma不同，在cdma系統中多個用戶均佔用同一時隙、同一頻隙，所不同的是選取的地址碼不同，而實際選用的地址碼間的互相關函數又不可能全部達到理想狀態的全為零，因而造成了多個用戶同時通信時，必然要產生多址干擾。
  3. In this thesis, we introduce the 3g system and the key technologies for 3g we emphasize on the technology of multi - user detection ( mud ). we analyze the performance of lmmse in various channels and prove that it can reduce the multiple access interference and the multi - path interference and it has a good ability to resist the near - far problem

    其中重點介紹了多用戶檢測技術，詳細分析了線性最小均方誤差檢測器（ lmmse檢測器）在awgn通道和衰落通道下、同異步ds - cdma系統中的性能，證明了該檢測器能夠有效地抑制多址干擾、多徑干擾，並具有良好的抗遠近效應能力。
分享友人
分享到 Line

分享到臉書