本文選題：平方公里射電陣項(xiàng)目　切入點(diǎn)：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(guó)參與平方公里射電陣(SKA)項(xiàng)目,深入理解數(shù)字波束形成條件下的射電干涉觀測(cè)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?jǐn)?shù)階時(shí)延濾波器數(shù)字波束形成兩個(gè)技術(shù)算法,前者使用互相關(guān)法求解相移量來(lái)提高波束指向精度,后者是傳統(tǒng)算法與射電觀測(cè)理論的有效結(jié)合。首先,詳細(xì)介紹了算法的理論推導(dǎo)并分析了它們的優(yōu)缺點(diǎn);然后,通過(guò)仿真實(shí)驗(yàn)驗(yàn)證了這兩個(gè)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(shí)延濾波器對(duì)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(xiàng)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(guó)科學(xué)院上海天文臺(tái);
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(2013CB87900) 國(guó)家自然科學(xué)基金資助項(xiàng)目(11403081) 天文臺(tái)站設(shè)備更新及重大儀器設(shè)備運(yùn)行專項(xiàng)經(jīng)費(fèi)資助項(xiàng)目(587121002)~~
【分類號(hào)】：P161
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本文編號(hào)：1606995