计算机应用
計算機應用
계산궤응용
COMPUTER APPLICATION
2009年
11期
2925-2927,2931
,共4页
多发多收%正交频分复用%导频辅助%最小二乘估计%小波包去噪
多髮多收%正交頻分複用%導頻輔助%最小二乘估計%小波包去譟
다발다수%정교빈분복용%도빈보조%최소이승고계%소파포거조
Multiple Input Multiple Output ( MIMO)%Orthogonal Frequency Division Multiplexing (OFDM)%pilot assisted%Least Squares (LS) estimation%wavelet packet de'nosing
对多输入多输出-正交频分复用(MIMO-OFDM)系统中基于导频辅助的最小二乘(LS)信道估计算法进行研究,针对LS算法对噪声影响比较敏感的缺点,提出了一种基于小波包去噪的信道估计方法,对导频符号的信道响应进行去噪处理后,再做内插估计.根据该方法的思想,基于长期演进(LTE)协议进行计算机仿真与分析,结果表明该方法比传统的LS估计算法具有更好的性能,能够有效减小信道噪声的影响,提高信道估计精度.
對多輸入多輸齣-正交頻分複用(MIMO-OFDM)繫統中基于導頻輔助的最小二乘(LS)信道估計算法進行研究,針對LS算法對譟聲影響比較敏感的缺點,提齣瞭一種基于小波包去譟的信道估計方法,對導頻符號的信道響應進行去譟處理後,再做內插估計.根據該方法的思想,基于長期縯進(LTE)協議進行計算機倣真與分析,結果錶明該方法比傳統的LS估計算法具有更好的性能,能夠有效減小信道譟聲的影響,提高信道估計精度.
대다수입다수출-정교빈분복용(MIMO-OFDM)계통중기우도빈보조적최소이승(LS)신도고계산법진행연구,침대LS산법대조성영향비교민감적결점,제출료일충기우소파포거조적신도고계방법,대도빈부호적신도향응진행거조처리후,재주내삽고계.근거해방법적사상,기우장기연진(LTE)협의진행계산궤방진여분석,결과표명해방법비전통적LS고계산법구유경호적성능,능구유효감소신도조성적영향,제고신도고계정도.
The Least Squares (LS) channel estimation algorithm based on pilot-assisted was investigated for Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing ( MIMO-OFDM) systems, aiming to overcome the shortcoming of LS algorithm being sensitive to the noise. The authors proposed a channel estimation method based on wavelet packet de-noising, which is interpolating after de-noising to the channel impulse response of the pilot symbols. Finally, according to the idea of this method, simulations and analysis were carried out based on the Long Term Evolution (LTE) protocol. The results prove that the proposed method has better performance than the traditional LS estimation algorithm: it can reduce the influence of channel noise effectively and improve the accuracy of channel estimation.
