通信学报
通信學報
통신학보
JOURNAL OF CHINA INSTITUTE OF COMMUNICATIONS
2013年
5期
1-11
,共11页
MIMO阵列天线%标量传感器阵列%电磁矢量传感器%空间谱估计%信道容量
MIMO陣列天線%標量傳感器陣列%電磁矢量傳感器%空間譜估計%信道容量
MIMO진렬천선%표량전감기진렬%전자시량전감기%공간보고계%신도용량
MIMO antenna array%scalar sensor array%electromagnetic vector sensor%spatial spectrum estimation%chan-nel capacity
将电磁矢量传感器(EVS, electromagnetic vetor sensor)信号处理法与传统 MIMO 信号处理有机地结合,建立了基于 EVS 的多天线三维信道模型.采用多重信号分类(MUSIC, multiple signal classification)算法对 MIMO 的达波信号方向(DOA, direction of arrival)进行空间谱估计,导出基于 EVS 的三维空间信道解析式,阐明了 EVS 信号处理与 MIMO 多径信道相关性的关系.与传统标量传感器阵列(SSA, scalar sensor array)MIMO 天线阵列比较, EVS 阵列能获取达波信号的多维极化信息,同时具有空间域和极化信号处理能力.因此可缓解空间多径信道相关性,使空间极化分量的相关性趋于零值,而且使 MIMO 系统性能受空间结构的影响较小.理论分析和仿真结果表明在提高 MIMO 天线系统性能上,基于 EVS 阵列的系统比 SSA 系统具有更高的优越性.
將電磁矢量傳感器(EVS, electromagnetic vetor sensor)信號處理法與傳統 MIMO 信號處理有機地結閤,建立瞭基于 EVS 的多天線三維信道模型.採用多重信號分類(MUSIC, multiple signal classification)算法對 MIMO 的達波信號方嚮(DOA, direction of arrival)進行空間譜估計,導齣基于 EVS 的三維空間信道解析式,闡明瞭 EVS 信號處理與 MIMO 多徑信道相關性的關繫.與傳統標量傳感器陣列(SSA, scalar sensor array)MIMO 天線陣列比較, EVS 陣列能穫取達波信號的多維極化信息,同時具有空間域和極化信號處理能力.因此可緩解空間多徑信道相關性,使空間極化分量的相關性趨于零值,而且使 MIMO 繫統性能受空間結構的影響較小.理論分析和倣真結果錶明在提高 MIMO 天線繫統性能上,基于 EVS 陣列的繫統比 SSA 繫統具有更高的優越性.
장전자시량전감기(EVS, electromagnetic vetor sensor)신호처리법여전통 MIMO 신호처리유궤지결합,건립료기우 EVS 적다천선삼유신도모형.채용다중신호분류(MUSIC, multiple signal classification)산법대 MIMO 적체파신호방향(DOA, direction of arrival)진행공간보고계,도출기우 EVS 적삼유공간신도해석식,천명료 EVS 신호처리여 MIMO 다경신도상관성적관계.여전통표량전감기진렬(SSA, scalar sensor array)MIMO 천선진렬비교, EVS 진렬능획취체파신호적다유겁화신식,동시구유공간역화겁화신호처리능력.인차가완해공간다경신도상관성,사공간겁화분량적상관성추우령치,이차사 MIMO 계통성능수공간결구적영향교소.이론분석화방진결과표명재제고 MIMO 천선계통성능상,기우 EVS 진렬적계통비 SSA 계통구유경고적우월성.
EVS(electromagnetic vetor sensor) signal processing method was combined with traditional MIMO signal processing method and three-dimensional channel model of multi-antenna array was set up. The algorithm of multiple signal classification (MUSIC) was adopted to make spatial spectrum estimation for direction of arrival (DOA) signal, analytical expressions of three-dimensional spatial channel was derived base on EVS for MIMO receiver system and the relationship between EVS signal processing and MIMO multipath channel correlation was clarified. To compare with tra-ditional MIMO antenna array, EVS array possesses abilities of obtaining multidimensional polarization information, processing spatial and polarization domain for arrival signal and degrading effects of spatial factors on MIMO channel capacity. Theoretical analysis and simulation results indicate that EVS array provide more advantages than traditional scalar sensor array on enhancing MIMO system performance.
