迭代接收下高效鏈路自適應傳輸方法
發(fā)布時間:2018-03-23 12:39
本文選題:迭代接收 切入點:鏈路自適應 出處:《東南大學學報(自然科學版)》2014年01期
【摘要】:針對3GPP LTE下行傳輸鏈路,研究迭代接收情況下的高效鏈路自適應(LA,Link Adaptation)方法.首先,給出迭代接收后驗信干比及等效信噪比的計算方法;然后,利用傳統(tǒng)LA方法確定秩指示和信道質量指示的取值范圍;接著,提出高效LA方法,該方法僅在秩指示和信道質量指示的范圍內(nèi)確定反饋參數(shù),減少了后驗信干比及等效信噪比的計算次數(shù),從而降低了在線吞吐量預測的計算量;最后,仿真結果表明,所提LA方法的吞吐量優(yōu)于傳統(tǒng)LA方法,滿足鏈路服務質量并且獲得了3.5 dB吞吐量增益.
[Abstract]:For the downlink of 3GPP LTE, the efficient link adaptive link adaptation method in the case of iterative reception is studied. Firstly, the method of calculating the posterior signal-to-interference ratio and the equivalent signal-to-noise ratio of iterative reception is given. The traditional LA method is used to determine the range of values of rank indication and channel quality indication. Then, an efficient LA method is proposed, which determines the feedback parameters only within the range of rank indication and channel quality indication. The computation times of posterior signal-to-interference ratio and equivalent signal-to-noise ratio are reduced, and the calculation amount of on-line throughput prediction is reduced. Finally, the simulation results show that the throughput of the proposed LA method is better than that of the traditional LA method. Meet the link quality of service and gain 3.5 dB throughput gain.
【作者單位】: 東南大學國家移動通信重點實驗室;
【基金】:國家自然科學基金資助項目(60925004,61201171) 國家高技術研究發(fā)展計劃(863計劃)資助項目(2012AA01A506) 中國博士后科學基金資助項目(2012M511174)
【分類號】:TN929.5
【共引文獻】
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