数据采集与处理
數據採集與處理
수거채집여처리
JOURNAL OF DATA ACQUISITION & PROCESSING
2008年
z1期
92-95
,共4页
信道估计%稀疏多径信道%广义Akaike信息论准则%多输入多输出正交频分复用
信道估計%稀疏多徑信道%廣義Akaike信息論準則%多輸入多輸齣正交頻分複用
신도고계%희소다경신도%엄의Akaike신식론준칙%다수입다수출정교빈분복용
对于多径稀疏的多输入多输出正交频分复用(Multiple-input and muItipIe-output orthogonal frequency division multiplexing,MIMO-OFDM)信道,提出了基于广义Akaike信息论准则(Generalized Akaike information criterion,GAIC)的MIMO-OFDM系统实用的信道估计算法,该算法能够估计出信道的长度和每径信道的时延,降低加性白噪声对信道估计的影响,提高信道估计的精度.通过仿真,与最小二来(Least squares,LS)算法和离散傅里叶变换(Discrete Fourier transform,DFT)算法相比较,大大地降低了信道的估计误差,提高了系统性能,且信道稀疏性越强,性能改善越好.
對于多徑稀疏的多輸入多輸齣正交頻分複用(Multiple-input and muItipIe-output orthogonal frequency division multiplexing,MIMO-OFDM)信道,提齣瞭基于廣義Akaike信息論準則(Generalized Akaike information criterion,GAIC)的MIMO-OFDM繫統實用的信道估計算法,該算法能夠估計齣信道的長度和每徑信道的時延,降低加性白譟聲對信道估計的影響,提高信道估計的精度.通過倣真,與最小二來(Least squares,LS)算法和離散傅裏葉變換(Discrete Fourier transform,DFT)算法相比較,大大地降低瞭信道的估計誤差,提高瞭繫統性能,且信道稀疏性越彊,性能改善越好.
대우다경희소적다수입다수출정교빈분복용(Multiple-input and muItipIe-output orthogonal frequency division multiplexing,MIMO-OFDM)신도,제출료기우엄의Akaike신식론준칙(Generalized Akaike information criterion,GAIC)적MIMO-OFDM계통실용적신도고계산법,해산법능구고계출신도적장도화매경신도적시연,강저가성백조성대신도고계적영향,제고신도고계적정도.통과방진,여최소이래(Least squares,LS)산법화리산부리협변환(Discrete Fourier transform,DFT)산법상비교,대대지강저료신도적고계오차,제고료계통성능,차신도희소성월강,성능개선월호.
