面向復(fù)雜電磁環(huán)境的多天線信道估計技術(shù)
doi: 10.11999/JEIT151316 cstr: 32379.14.JEIT151316
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2.
(電子科技大學(xué)通信抗干擾國家級重點(diǎn)實(shí)驗(yàn)室 成都 610054) ②(信息感知技術(shù)協(xié)同創(chuàng)新中心 西安 710071)
基金項(xiàng)目:
國家863計劃(2015AA8098083C)，國家自然科學(xué)基金(61471100, 61101090)，中央高?；?ZYGX2015J012)
Multiple Antenna Channel Estimation Technology in Complex Electromagnetic Environment
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2.
(National Communication Laboratory, University of Electronic Science and Technology of China, Chengdu 610054, China)
Funds:
The National 863 Program of China (2015AA8098083C), The National Natural Science Foundation of China (61471100, 61101090), The Fundamental Research Funds for the Central Universities (ZYGX2015J012)
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摘要: 對于基于認(rèn)知無線電架構(gòu)的多天線信道估計技術(shù)，由于傳統(tǒng)零相關(guān)序列是在全部頻譜可用前提下設(shè)計的，在復(fù)雜電磁環(huán)境的頻譜限制下，傳統(tǒng)零相關(guān)序列部分頻域元素發(fā)生變化，且不再滿足原始序列的周期相關(guān)特性，因此不能直接應(yīng)用于復(fù)雜電磁環(huán)境的多天線信道估計。該文介紹了多天線通信系統(tǒng)的信道估計算法并指出對理想序列的要求，然后針對復(fù)雜電磁環(huán)境，即在存在頻譜空穴的條件下，聯(lián)合優(yōu)化頻譜受限和良好周期相關(guān)程度兩大評價指標(biāo)，設(shè)計出適用的序列集合，作為訓(xùn)練序列應(yīng)用到認(rèn)知無線電系統(tǒng)的信道估計算法中，仿真結(jié)果驗(yàn)證了新序列集合的有效性。
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關(guān)鍵詞:
- 多天線信道估計 /
- 復(fù)雜電磁環(huán)境 /
- 頻譜受限 /
- 序列設(shè)計
Abstract: For channel estimation technology of multiple antenna communication system based on cognitive radio architecture, traditional zero correlation zone sequences (which assume the availability of the entire spectral band) can not be used because their orthogonality will be destroyed by the spectrum hole constraint. This paper introduces the channel estimation algorithm in multiple antenna communication system and points out the requirement of the ideal sequence set, then on complex electromagnetic environment, i.e., under the condition of the existence of spectrum holes, joints optimization evaluation indexes of limited spectrum and good cycle correlation degree, designs a suitable sequence set, which can be applied to the channel estimation algorithm of cognitive radio system. The simulation results verify the effectiveness of the new sequence set. -
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