本文選題：正交頻分復(fù)用　切入點(diǎn)：矢量正交頻分復(fù)用　出處：《通信學(xué)報(bào)》2017年09期 　論文類型：期刊論文

【摘要】：為解決多速率多載波擴(kuò)頻多址系統(tǒng)存在的信道衰落條件下性能下降以及頻譜效率相對(duì)較低的問(wèn)題,利用矩陣置換原理和r循環(huán)信道矩陣的分解特性,提出一種自適應(yīng)多速率DFT加擾矢量多載波碼分多址接入(AMR-DFT-VMC-CDMA)系統(tǒng)模型。在理論分析的基礎(chǔ)上,綜合考慮一定信道利用率條件下,信道誤碼率與發(fā)送信號(hào)幀長(zhǎng)的相互制約關(guān)系,提出自適應(yīng)參數(shù)調(diào)整算法以確保足夠長(zhǎng)的傳輸幀長(zhǎng)。仿真結(jié)果表明,該系統(tǒng)在衰落信道下相比傳統(tǒng)的多速率多載波擴(kuò)頻系統(tǒng)具有更好的性能,且通過(guò)調(diào)整參數(shù),既滿足了一定信道利用率下對(duì)幀長(zhǎng)的要求,保證了頻譜效率提高,又可以靈活完成多速率多用戶的信息傳輸。
[Abstract]:In order to solve the problem of poor performance and relatively low spectral efficiency in multi-rate multi-carrier spread spectrum multiple access system, the matrix permutation principle and the decomposition property of r-cyclic channel matrix are used. An adaptive multi-rate DFT scrambling vector multicarrier code division multiple access (MAC) AMR-DFT-VMC-CDMA system model is proposed. On the basis of theoretical analysis, the relationship between the BER and the frame length of the transmitted signal is considered. An adaptive parameter adjustment algorithm is proposed to ensure long transmission frame length. The simulation results show that the proposed system has better performance than the traditional multi-rate multi-carrier spread spectrum system in fading channel. It not only meets the requirements of frame length under certain channel utilization, but also ensures the improvement of spectrum efficiency and the flexibility of multi-rate and multi-user information transmission.
【作者單位】： 西南交通大學(xué)信息科學(xué)與技術(shù)學(xué)院信息編碼與傳輸四川省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(No.61032002,No.60872014) 高校學(xué)科創(chuàng)新引智計(jì)劃(“111”計(jì)劃)基金資助項(xiàng)目(No.111-2-14)~~
【分類號(hào)】：TN929.5
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本文編號(hào)：1597257