Turbo碼在最大比合并分集接收系統(tǒng)中的性能分析
Performance Analysis of Turbo Codes for Maximal Ratio Combining Receivers
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摘要: 該文提出了turbo碼在最大比合并分集接收無線通信系統(tǒng)中糾錯性能的聯(lián)合上界。基于誤差積分函數(shù)的簡化計算式，推導(dǎo)了分集接收的多路信道分別具有不同衰落特性時，成對差錯概率的精確表達式。以瑞利衰落信道為例，對采用turbo碼的分集接收無線系統(tǒng)的性能進行了數(shù)值計算和仿真。結(jié)果表明：turbo碼糾錯性能聯(lián)合上界數(shù)值計算式與仿真結(jié)果一致，可普遍用于信道衰落統(tǒng)計特性各不相同的分集接收系統(tǒng)。
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關(guān)鍵詞:
- Turbo碼; 最大比合并分集接收; 衰落信道; 成對差錯概率
Abstract: Upper union bounds of turbo codes for maximal ratio combining (MRC) diversity systems are presented in this paper. The simplified expression of error integral function is used to derive the precise expressions of pairwise error probability for MRC receivers wherein the probabilities of slow fading multichannel come from different distribution families. The numerical analysis and simulations performed over Rayleigh channel demonstrate that the theoretical analysis conforms to the simulations. It is concluded that the derived expressions can be generally used for the performance estimation of MRC multichannel receivers with different fading statistics. -
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