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基于局部方差的MIMO頻譜感知算法研究

賈瓊 李兵兵

賈瓊, 李兵兵. 基于局部方差的MIMO頻譜感知算法研究[J]. 電子與信息學(xué)報(bào), 2015, 37(7): 1525-1530. doi: 10.11999/JEIT141540
引用本文: 賈瓊, 李兵兵. 基于局部方差的MIMO頻譜感知算法研究[J]. 電子與信息學(xué)報(bào), 2015, 37(7): 1525-1530. doi: 10.11999/JEIT141540
Jia Qiong, Li Bing-bing. MIMO Spectrum Sensing Method Based on the Local Variance[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1525-1530. doi: 10.11999/JEIT141540
Citation: Jia Qiong, Li Bing-bing. MIMO Spectrum Sensing Method Based on the Local Variance[J]. Journal of Electronics & Information Technology, 2015, 37(7): 1525-1530. doi: 10.11999/JEIT141540

基于局部方差的MIMO頻譜感知算法研究

doi: 10.11999/JEIT141540
基金項(xiàng)目: 

國(guó)家自然科學(xué)基金(61271299),博士后科學(xué)基金(2014M562372)和高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃項(xiàng)目(B08038)

MIMO Spectrum Sensing Method Based on the Local Variance

  • 摘要: 在認(rèn)知無(wú)線電網(wǎng)絡(luò)中,高效且準(zhǔn)確的頻譜感知是必不可少的一個(gè)環(huán)節(jié)。該文主要研究了MIMO場(chǎng)景下的頻譜感知問(wèn)題??紤]到頻譜被主用戶占用和頻譜空閑這兩種場(chǎng)景下,認(rèn)知用戶各天線接收到信號(hào)之間的相關(guān)結(jié)構(gòu)有差異,針對(duì)接收信號(hào)的采樣協(xié)方差矩陣,提出了局部方差的概念,并在此基礎(chǔ)上設(shè)計(jì)了基于局部方差的MIMO頻譜感知方法。根據(jù)漸近分布理論,推導(dǎo)了所述方法的理論檢測(cè)門限。最后,采用蒙特卡洛仿真方法,分別分析了AWGN信道和Rayleigh信道下該方法的檢測(cè)性能,并與相關(guān)的感知算法進(jìn)行了對(duì)比。結(jié)果表明:在相同的環(huán)境下,該文所提方法相比其他方法檢測(cè)性能更高,且所需的采樣點(diǎn)數(shù)更小,能夠?qū)崿F(xiàn)快速且精確的檢測(cè)。
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出版歷程
  • 收稿日期:  2014-12-04
  • 修回日期:  2015-02-09
  • 刊出日期:  2015-07-19

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