【摘要】：針對(duì)陣列天線衛(wèi)星移動(dòng)通信抗干擾能力差、傳播損耗大等特性,設(shè)計(jì)了一種數(shù)字波束形成技術(shù)(DBF)和擴(kuò)頻技術(shù)相結(jié)合的數(shù)字接收機(jī)。其中,DBF算法采用基于遞歸最小均方算法(RLS)的解擴(kuò)重?cái)U(kuò)盲自適應(yīng)波束形成算法,使用VxWorks實(shí)現(xiàn)權(quán)值計(jì)算,FPGA實(shí)現(xiàn)波束形成;擴(kuò)頻方式采用直接序列擴(kuò)頻,在FPGA中實(shí)現(xiàn)。仿真分析與樣機(jī)測(cè)試顯示,通過(guò)兩項(xiàng)技術(shù)聯(lián)合使用,在信噪比低至-45 dB條件下仍可以實(shí)現(xiàn)可靠通信,同時(shí)有效加強(qiáng)了系統(tǒng)抗干擾能力。
[Abstract]:A digital receiver combining digital beamforming (DBF) and spread spectrum (SS) technology is designed to solve the problem of poor anti-jamming and high propagation loss of antenna array satellite mobile communication. Among them, the DBF algorithm adopts the blind adaptive beamforming algorithm of despreading and respreading based on the recursive least mean square algorithm (RLS), uses VxWorks to calculate the weights and FPGA to realize the beamforming, and the spread spectrum adopts direct sequence spread spectrum, which is implemented in FPGA. Simulation analysis and prototype test show that the system can communicate reliably under the condition of low SNR up to -45 dB, and the anti-jamming ability of the system can be effectively enhanced by using the two techniques together.
【作者單位】： 中國(guó)科學(xué)技術(shù)大學(xué)核探測(cè)與核電子學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)技術(shù)大學(xué)近代物理系物理電子學(xué)安徽省重點(diǎn)實(shí)驗(yàn)室;北京空間信息中繼傳輸技術(shù)研究中心;
【分類號(hào)】：TN927.23
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本文編號(hào)：2277867