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一種基于最大化Rayleigh熵的穩(wěn)健干擾對齊算法

謝顯中,  李丹,  張森林,  雷維嘉

謝顯中, 李丹, 張森林, 雷維嘉. 一種基于最大化Rayleigh熵的穩(wěn)健干擾對齊算法[J]. 電子與信息學(xué)報(bào), 2016, 38(9): 2241-2247. doi: 10.11999/JEIT160103
引用本文: 謝顯中, 李丹, 張森林, 雷維嘉. 一種基于最大化Rayleigh熵的穩(wěn)健干擾對齊算法[J]. 電子與信息學(xué)報(bào), 2016, 38(9): 2241-2247. doi: 10.11999/JEIT160103
XIE Xianzhong, LI Dan, ZHANG Senlin, LEI Weijia. A Robust Interference Alignment Algorithm Based on Maximizing the Rayleigh Entropy[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2241-2247. doi: 10.11999/JEIT160103
Citation: XIE Xianzhong, LI Dan, ZHANG Senlin, LEI Weijia. A Robust Interference Alignment Algorithm Based on Maximizing the Rayleigh Entropy[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2241-2247. doi: 10.11999/JEIT160103

一種基于最大化Rayleigh熵的穩(wěn)健干擾對齊算法

doi: 10.11999/JEIT160103 cstr: 32379.14.JEIT160103
基金項(xiàng)目: 

國家自然科學(xué)基金(61271259, 61471076)，重慶市教委科學(xué)技術(shù)研究項(xiàng)目(KJ120501, KJ130536)，長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃(IRT1299)，重慶市科委重點(diǎn)實(shí)驗(yàn)室專項(xiàng)經(jīng)費(fèi)(CSTC)

A Robust Interference Alignment Algorithm Based on Maximizing the Rayleigh Entropy

Funds: 

The National Natural Science Foundation of China (61271259, 61471076), The Research Project of Chongqing Education Commission (KJ120501, KJ130536), The Program for Changjiang Scholars and Innovative Research Team in University (IRT1299), The Special Fund of Chongqing Key Laboratory (CSTC)

  • 摘要: 干擾對齊在消除干擾方面具有獨(dú)到的優(yōu)勢，但需要完美的信道狀態(tài)信息(CSI)，這在實(shí)際中很難實(shí)現(xiàn)。該文分析了傳統(tǒng)穩(wěn)健干擾對齊方案的優(yōu)缺點(diǎn)，在此基礎(chǔ)上，提出一種最大化Rayleigh熵的穩(wěn)健干擾對齊算法，并對收斂性，自由度和頻譜效率等進(jìn)行了分析。不同于MAX-SINR算法，該文通過最大化信號的Rayleigh熵，求得干擾抑制矩陣。在正向通信中，考慮到數(shù)據(jù)流之間的相關(guān)性取干擾抑制矩陣為原始干擾抑制矩陣的酉矩陣形式，并采用注水功率分配實(shí)現(xiàn)用戶數(shù)據(jù)流間的最佳功率分配；基于信道的互惠性，在反向通信時(shí)，做類似的處理。通過迭代計(jì)算，逐漸將干擾壓縮。最后，在完美CSI和誤差CSI時(shí)，仿真表明該算法顯著地提高了系統(tǒng)的性能。
    Abstract: Interference alignment has the advantage of eliminating interference, but it needs the perfect Channel State Information (CSI) which is difficult to achieve in practical systems. The advantages and disadvantages of robust interference alignment algorithms are analyzed in this paper. And then a robust interference alignment algorithm based on maximizing the Rayleigh entropy is proposed. The convergence, the degree of freedom and spectrum efficiency are analyzed at the same time. Unlike MAX-SINR algorithm, interference suppression matrix is obtained through maximizing the signal Rayleigh entropy. The unitary form of original interference suppression matrix is regarded as the optimal interference suppression matrix considering the correlation among the data flows. And then, the water-filling power allocation scheme is used to realize the optimal power allocation among user data flows. Meanwhile, the similar process is carried out in reverse communication link based on channel reciprocity. The interference is reduced gradually through alternately computing. Finally, under the conditions of perfect CSI and error CSI, the simulation results verify that the proposed algorithm improves the performance of the system.
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出版歷程
  • 收稿日期:  2016-01-21
  • 修回日期:  2016-06-08
  • 刊出日期:  2016-09-19

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