电子科技大学学报
電子科技大學學報
전자과기대학학보
JOURNAL OF UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
2010年
2期
173-175,181
,共4页
DFP%DOA估计%拟Newton法%功率估计
DFP%DOA估計%擬Newton法%功率估計
DFP%DOA고계%의Newton법%공솔고계
Davidon-Fletcher-Powell%DOA estimation%Newton-like method%power estimation
为了增加移动通信的容量和链接质量,需要准确地知道到达波的方向(DOA)和功率.该文提出了多维非线性目标函数,用来波DOA和功率作优化变量,并采用拟Newton法中常用的Davidson-Fletcher-Powell (DFP)算法进行优化;将优化结果和轮换投影(AP)算法进行比较.仿真表明,当入射信号在空间相隔较远时,该结果和AP算法精度相当,当入射信号在空间接近时,该结果优于AP算法.
為瞭增加移動通信的容量和鏈接質量,需要準確地知道到達波的方嚮(DOA)和功率.該文提齣瞭多維非線性目標函數,用來波DOA和功率作優化變量,併採用擬Newton法中常用的Davidson-Fletcher-Powell (DFP)算法進行優化;將優化結果和輪換投影(AP)算法進行比較.倣真錶明,噹入射信號在空間相隔較遠時,該結果和AP算法精度相噹,噹入射信號在空間接近時,該結果優于AP算法.
위료증가이동통신적용량화련접질량,수요준학지지도도체파적방향(DOA)화공솔.해문제출료다유비선성목표함수,용래파DOA화공솔작우화변량,병채용의Newton법중상용적Davidson-Fletcher-Powell (DFP)산법진행우화;장우화결과화륜환투영(AP)산법진행비교.방진표명,당입사신호재공간상격교원시,해결과화AP산법정도상당,당입사신호재공간접근시,해결과우우AP산법.
To increase the capacity and link performance of mobile communications, it is important to accurately estimate the powers and directions of arrival (DOA) of sources. A multi-dimension nonlinear cost function is proposed for this purpose, where the DOAs and powers of sources are optimization parameters. The optimal results are obtained with the Davidson-Fletcher-Powell (DFP) algorithm and are compared with the results of alternating projection (AP) algorithm. The simulation results show that DFP has the accuracy in accordance with AP when sources are away from each other, but higher than AP when sources are near.
