本文選題：平方公里射電陣項目　切入點：低頻陣列　出處：《電訊技術(shù)》2016年09期 　論文類型：期刊論文

【摘要】：為配合我國參與平方公里射電陣(SKA)項目,深入理解數(shù)字波束形成條件下的射電干涉觀測和相應(yīng)數(shù)據(jù)處理算法,提出了基于多相濾波器組信道化數(shù)字移相波束形成和基于分數(shù)階時延濾波器數(shù)字波束形成兩個技術(shù)算法,前者使用互相關(guān)法求解相移量來提高波束指向精度,后者是傳統(tǒng)算法與射電觀測理論的有效結(jié)合。首先,詳細介紹了算法的理論推導(dǎo)并分析了它們的優(yōu)缺點;然后,通過仿真實驗驗證了這兩個算法的正確性,仿真結(jié)果表明基于多相濾波器組信道化數(shù)字移相波束形成算法相比傳統(tǒng)算法具有一定的優(yōu)越性;最后,分析了不同階數(shù)時延濾波器對波束形成的影響并得出了相應(yīng)結(jié)論。這些仿真結(jié)果及結(jié)論可為從事SKA項目的科研人員提供參考。
[Abstract]:In order to cooperate with the participation of our country in the Radio Array SKA project, we have a deep understanding of the radio interference observation and the corresponding data processing algorithms under the condition of digital beamforming. Two digital beamforming algorithms based on channelization of multiphase filter banks and digital beamforming based on fractional delay filter are proposed. In the former, the phase shift is solved by cross-correlation method to improve the pointing accuracy of the beam. The latter is an effective combination of the traditional algorithm and the radio observation theory. Firstly, the theoretical derivation of the algorithm and their advantages and disadvantages are introduced in detail, and then the correctness of the two algorithms is verified by simulation experiments. The simulation results show that the channelized digital phase-shift beamforming algorithm based on polyphase filter banks has some advantages over the traditional algorithm. The influence of different order delay filters on beamforming is analyzed and the corresponding conclusions are drawn. These simulation results and conclusions can provide reference for researchers engaged in SKA projects.
【作者單位】： 中國科學(xué)院上海天文臺;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)項目(2013CB87900) 國家自然科學(xué)基金資助項目(11403081) 天文臺站設(shè)備更新及重大儀器設(shè)備運行專項經(jīng)費資助項目(587121002)~~
【分類號】：P161
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本文編號：1606995