【摘要】：在鏈路資源受限條件下的擴(kuò)頻通信應(yīng)用中,多址干擾是限制系統(tǒng)多用戶(hù)服務(wù)能力和通信質(zhì)量的主要因素。該文針對(duì)多址干擾消除問(wèn)題,首次將格基約減理論應(yīng)用到擴(kuò)頻通信多址干擾消除中,提出基于格基約減輔助的多用戶(hù)檢測(cè)算法,通過(guò)格基約減變換實(shí)現(xiàn)對(duì)信號(hào)間互相關(guān)矩陣的正交性?xún)?yōu)化,使多用戶(hù)檢測(cè)算法性能得到改進(jìn),以較低的運(yùn)算復(fù)雜度實(shí)現(xiàn)了逼近最大似然算法的檢測(cè)性能。該算法在對(duì)抗強(qiáng)遠(yuǎn)近效應(yīng)方面表現(xiàn)出優(yōu)異性能,不同于傳統(tǒng)多用戶(hù)檢測(cè)算法在惡劣多址環(huán)境下檢測(cè)性能的嚴(yán)重退化,該算法能夠保持對(duì)最大似然檢測(cè)算法性能的逼近,可以使擴(kuò)頻通信系統(tǒng)的傳輸可靠性、多用戶(hù)服務(wù)能力以及環(huán)境適應(yīng)性得到顯著增強(qiáng)。
[Abstract]:In the application of spread spectrum communication under the condition of limited link resources, multiple access interference (mai) is the main factor that limits the multi-user service ability and communication quality of the system. In order to solve the problem of multiple access interference cancellation, the lattice reduction theory is applied to the multiple access interference cancellation of spread spectrum communication for the first time. A multi-user detection algorithm based on lattice reduction subtraction is proposed. The orthogonal optimization of the cross-correlation matrix between signals is realized by lattice basis reduction transform, so that the performance of the multi-user detection algorithm is improved, and the detection performance of the approximate maximum likelihood algorithm is realized with lower computational complexity. The algorithm shows excellent performance in fighting the strong far and near effect, which is different from the serious degradation of the detection performance of the traditional multi-user detection algorithm in the harsh multiple access environment. The algorithm can maintain the approximate performance of the maximum likelihood detection algorithm, and can significantly enhance the transmission reliability, multi-user service ability and environmental adaptability of the spread spectrum communication system.
【作者單位】： 中國(guó)電子科技集團(tuán)公司第五十四研究所;衛(wèi)星導(dǎo)航系統(tǒng)與裝備技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(91638203) 國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFB0502102)~~
【分類(lèi)號(hào)】：TN914.42

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