计算机应用与软件
計算機應用與軟件
계산궤응용여연건
COMPUTER APPLICATIONS AND SOFTWARE
2013年
11期
90-94,130
,共6页
信道盲辨识%公共零点%聚类%信道阶数估计
信道盲辨識%公共零點%聚類%信道階數估計
신도맹변식%공공영점%취류%신도계수고계
Channel blind identification%Common zeros%Clustering%Channel order estimation
研究子空间算法在阶数过估计时的信道零点分布，发现在有噪情况下额外引入的“公共零点”呈单位圆聚集性，并给出相关的理论分析。基于此，提出一种简单新颖的基于信道近零点分布的盲辨识算法。结合同样基于子空间的NECOE改进算法所得到的过估计信息，从估计的信道零点中移除“公共零点”，从而实现正确的信道估计。仿真验证了该算法在较低信噪比情况下性能良好，复杂度低。
研究子空間算法在階數過估計時的信道零點分佈，髮現在有譟情況下額外引入的“公共零點”呈單位圓聚集性，併給齣相關的理論分析。基于此，提齣一種簡單新穎的基于信道近零點分佈的盲辨識算法。結閤同樣基于子空間的NECOE改進算法所得到的過估計信息，從估計的信道零點中移除“公共零點”，從而實現正確的信道估計。倣真驗證瞭該算法在較低信譟比情況下性能良好，複雜度低。
연구자공간산법재계수과고계시적신도영점분포，발현재유조정황하액외인입적“공공영점”정단위원취집성，병급출상관적이론분석。기우차，제출일충간단신영적기우신도근영점분포적맹변식산법。결합동양기우자공간적NECOE개진산법소득도적과고계신식，종고계적신도영점중이제“공공영점”，종이실현정학적신도고계。방진험증료해산법재교저신조비정황하성능량호，복잡도저。
By studying the distribution of channel zeros produced by sub-space algorithm in the circumstance of over estimating the channel order, it is found that the additionally introduced common zeros in noisy environment are gathered around the unit circle in clusters , and the correlated theoretical analysis is presented in the paper as well .On this basis , a simple and novel algorithm of blind identification based on the distribution of the channel near-common zeros is proposed .Combined with the over estimation information obtained from a modified NECOE algorithm also based on sub-space, the correct channel estimation can be achieved by removing the common zeros from the estimated channel zeros.Simulation verifies that this algorithm has good performance with a low complexity under the condition of lower SNR .
