基于最小均方誤差準(zhǔn)則的盲多用戶檢測新算法
A New MMSE Approach to Blind Multiuser Detection
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摘要: 碼分多址信號在無線多徑衰落信道條件下的盲多用戶檢測具有很大的理論和實際意義。該文提出了一種直接基于最小均方誤差(MMSE)準(zhǔn)則的盲多用戶檢測算法。為保證算法收斂到目標(biāo)用戶，提出了一種基于MMSE準(zhǔn)則的新的線性約束方法。該方法能保證檢測器收斂到最優(yōu)MMSE解。此外，該文還設(shè)計了一種形式簡單、快速收斂的迭代算法。對比現(xiàn)有的最小輸出能量(MOE)算法，仿真結(jié)果表明本文算法具有較好的性能。
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關(guān)鍵詞:
- 最小均方誤差; 線性約束; 盲多用戶檢測
Abstract: Blind multiuser detection in multipath fading channel is an interesting topic in code division multiple access systems. In this paper a blind adaptive multiuser detector based on Minimum Mean Square Error (MMSE) criterion is proposed. In order to guarantee that the algorithm converges to the desired user, a new linear constraint technique that limits the searching space is developed. The new constraint can guarantee that the algorithm converges to the global MMSE optimal solution. Besides, an efficient iterative implementation that provides very fast convergence is proposed. Simulation results show the efficiency of the proposed algorithm. -
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