multiple access path 中文意思是什麼
multiple access path
解釋
多路存取路徑-
And by use of the properties of modified complementary series, we try to cancel the effect of disturbance including multiple - access interference and multiple - path interference
為此，本論文提出一種新型的cdma通信方式? ?試圖採用修正互補序列的特性從接收機的相干輸出中消除多徑干擾的影響。 -
Contributions in this paper mainly sh ow four points : 1 the structure characteristic of the received ds - cdma signal is analyzed in the presence of multi - path slow fading effect case for wireless mobile communication. according to this characteristic, four data - selected schemes based on chip - matched filter are presented from the perspective of energy and structure of signal. and the impact of these schemes on multiple - access interference ( mai ) and inter - symbol interference ( isi ) is analyzed
本文的主要貢獻在於四個方面： 1 、針對無線移動通信系統中廣泛存在多徑慢衰落效應的情況，分析了ds - cdma系統中接收信號本身的結構特徵，根據這個特徵，在匹配濾波的基礎上，從能量與信號結構的角度提出了四種不同的數據採用方案，並分析了不同數據方案對多址干擾與碼間干擾的影響。 -
On the other hand, cdma ( code - division multiple access ) communication system has been widely considered as the mainstream of 3g communication system, because it has the good qualities such as high utilization ratio of frequency band, low transmission power, powerful anti - multiple path falling and flexible capacity
另一方面， cdma通信系統以其高頻譜利用率、低發射功率、強抗多徑衰落特性、軟容量等優點，已被廣泛認為是第三代移動通信系統的主流。 -
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。
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