一種基于檢測信息可靠度的部分軟干擾消除迭代多用戶檢測算法
An Iterative Multiuser Detection Algorithm Using Partial Soft Interfenrence Cancellation Based on Detection Reliability
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摘要: 該文提出了一種基于檢測信息可靠度的部分軟干擾消除迭代多用戶檢測算法。如果由從信道譯碼器所獲得的發(fā)送字符的先驗信息大于某一預定閾值，則認為對其檢測具有較高的可靠度，因而可以考慮將其對應的多址干擾成分從匹配濾波器輸出向量中直接消除，相當于減小了干擾用戶的數(shù)目，從而可以減小迭代多用戶檢測算法的復雜度。該算法的計算復雜度能夠隨著多址干擾的減小和信道信噪比的增大而降低。
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關(guān)鍵詞:
- 迭代多用戶檢測; 部分軟干擾消除; 多址干擾
Abstract: In this paper, an iterative multiuser detection algorithm using partial soft interfenrence cancellation based on detection reliability is proposed. If the a priori information of the transmitted symbols provided by the channel decoder in the previous iteration is larger than a predefined threshold , the detection of these symbols are thought to be reliable and the corresponding MAI (Multiuser Access Interfenrence) can be eliminated from the outputs of the matched filters. This is equal to decrease the number of the interference users, thus the complexity of the iterative multiuser detection algorithm is decreased. Furthermore, when the MAI is moderate and the SNR is high, the computational complexity of this algorithm can be reduced adaptively. -
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