rotational invariance 中文意思是什麼
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An algorithm for matching the esprit ' s estimation of two - dimensional angle by using twice svd and once schur is proposed. using two row uniformity sensor - arrays and adding one sensor, the algorithm decomposes the array twice and exploits rotational invariance properties of signal space, so that both angles may be computed via matrix pencil method, and these estimates are automatically paired. simulation results are presented to verify the efficacy of the proposed algorithm
首先針對esprit演算法對窄帶源進行二維doa估計存在測向冗餘的情況，提出了一種改進演算法，該演算法利用子陣信號數據矩陣中包含的信號空間的旋轉不變性質，藉助于矩陣束方法求解出信號的二維到達角，並且利用兩次奇異值及一次schur分解從而實現了esprit二維doa估計參量的自動配對； 2 -
Within one single source echo, both doa and time - delay can be estimated simultaneously by this algorithm via high - resolution rotational invariance technique and high - resolution time - delay frequency ( tdf ) technique. the esprit - tdf algorithm has features of low computation, good precision, and high resolution both in doa and time - delay. it is suitable for multiple source exact localization
該方法利用高分辨旋轉不變技術和高分辨時延頻率技術，可在單次目標回波內實現多目標信號的方位和時延參數的高分辨聯合估計，具有運算量小、分辨能力強、估計精度高等特點，能夠對多目標進行高分辨精確定位。 -
Then, the advanced algorithms of doa estimation on this paper are the multiple signal classification ( music ) method, esprition of signal paramenters via rotational invariance techniques ( esprit ) algorithm and estimation of spatial two - dimension doa
然後重點研究doa估計演算法中的多重信號分類（ music ）演算法，旋轉不變子空間（ esprit ）演算法和二維doa估計演算法。 -
Fft is applied to data and spectra peak search is done, then using the data near the spectra peaks to compute two 4th - order cumulants matrix to form rotational invariance matrix pencil which the esprit algorithm can be applied to
對采樣數據進行fft和譜峰搜索，截取譜峰附近數據構造一路信號的四階累積量矩陣和二路信號的互四階累積量矩陣，構成了一對esprit演算法所需要的旋轉不變矩陣束。 -
In addition, research on esprit ( estimation of signal parameter via rotational invariance technique ) super - resolution imaging technology is made to improve image quality, especially in the case of small segment of viewing angle. afterward, a new multi - target isar imaging method for high - speed targets is presented
2 .在方位向的補償（相位校正）方面，利用多重的離散傅立葉變換（ dcft ） ，對目標平動引起的相位線性調頻項的調頻斜率進行精確估計，並直接構造補償項對各個距離門進行補償。 -
Array processing plays a very important role in many fields such as mobile comunication, electronic reconnaissance, parameter estimation, signal discrimination and so on. subspace - based method is one of the important methods of array processing and has producted plenty of high performance algorithms through years of development. the typical ones are music ( multiple signal classification ), esprit ( estimation of signal parameters via rotational invariance technique )
信號子空間方法是陣列測向方法中重要的一種，經過多年的發展，已經產生了大量性能優異的測向演算法，典型的有music （ multiplesignalclassification ） 、 esprit （ estimationofsignalparametersviarotationalinvariancetechnique ）等。
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