多用戶跳時(shí)超寬帶系統(tǒng)串行碼捕獲性能分析
The Multiuser Acquisition Performance Analysis with TH UWB System
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摘要: 根據(jù)超寬帶系統(tǒng)多徑延遲的特點(diǎn),該文給出一種易于實(shí)現(xiàn)的超寬帶跳時(shí)串行捕獲方法;并在此基礎(chǔ)上,著重分析了該系統(tǒng)在多用戶環(huán)境下的系統(tǒng)捕獲性能;最后通過理論推導(dǎo)和數(shù)值仿真分析了用戶數(shù)量、檢測(cè)概率、虛警概率、判決門限以及平均捕獲時(shí)間之間的相互制約關(guān)系.從結(jié)果中看到,隨著用戶數(shù)的增加,檢測(cè)概率將降低,而判決門限及虛警概率提高,串行捕獲時(shí)間也將從微秒級(jí)增加到毫秒級(jí).
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關(guān)鍵詞:
- 超寬帶;跳時(shí);檢測(cè)概率;虛警概率;判決門限;平均捕獲時(shí)間
Abstract: This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system. Based on this method, the acquisition performance in the multiuser environment is analyzed, and the relationships between the detection probability, false alarm probability, detection threshold and average acquisition time are given. From the theoretical analysis and numerical simulation, it is noted that with the increasing of user number, the detection probability will decrease. By contrary, the false alarm and the detection threshold will increase accordingly, and the acquisition time will also increase from s to ms. -
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