一種新的盲空時多用戶接收機(jī)及其改進(jìn)形式
New Blind Space-Time Multiuser Receiver and Its Improved Method
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摘要: 該文對空時多用戶接收機(jī)提出了變步長LMS盲自適應(yīng)算法,該算法提出了一種新的雙誤差函數(shù)來解決系統(tǒng)的約束優(yōu)化問題。進(jìn)一步地,考慮到用戶信號多徑衰落的特點(diǎn),提出一種新標(biāo)準(zhǔn)對目標(biāo)用戶多徑傳輸信號進(jìn)行預(yù)選擇,從而在降低系統(tǒng)的運(yùn)行成本與維持系統(tǒng)的性能之間找到一種新的折衷途徑。仿真結(jié)果證明了上述算法的有效性。
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關(guān)鍵詞:
- 多徑衰落; 多用戶檢測; 空時處理
Abstract: In the paper, a varied step length LMS algorithm is adopted in space-time multiuser receiver, in which a new bierror function is used to solve the constrained optimization problem. Furthermore, based on the character of the users signals in fading channels, a new standard is presented to filter the users signals in advance. The method will reduce the running cost of the system greatly and present a new controllable tread of f means between the system performance and its running cost. The above algorithm is verified by the following simulations. -
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