东南大学学报（自然科学版）
東南大學學報（自然科學版）
동남대학학보（자연과학판）
JOURNAL OF SOUTHEAST UNIVERSITY
2014年
1期
1-6
,共6页
薛昀%姜帆%江彬%高西奇
薛昀%薑帆%江彬%高西奇
설윤%강범%강빈%고서기
迭代接收%链路自适应%后验信干比%等效信噪比%秩指示%信道质量指示
迭代接收%鏈路自適應%後驗信榦比%等效信譟比%秩指示%信道質量指示
질대접수%련로자괄응%후험신간비%등효신조비%질지시%신도질량지시
turbo IC(interference cancelation)receivers%link adaptation%post SINR(signal-to-in-terference-plus-noise ratio )%effective SNR (signal-to-noise ratio )%rank indication%channel quality indication
针对3 GPP LTE下行传输链路，研究迭代接收情况下的高效链路自适应（LA，Link Adapta-tion）方法．首先，给出迭代接收后验信干比及等效信噪比的计算方法；然后，利用传统LA方法确定秩指示和信道质量指示的取值范围；接着，提出高效LA方法，该方法仅在秩指示和信道质量指示的范围内确定反馈参数，减少了后验信干比及等效信噪比的计算次数，从而降低了在线吞吐量预测的计算量；最后，仿真结果表明，所提LA方法的吞吐量优于传统LA方法，满足链路服务质量并且获得了3．5 dB吞吐量增益．
針對3 GPP 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 Adapta-tion）方法．首先，給齣迭代接收後驗信榦比及等效信譟比的計算方法；然後，利用傳統LA方法確定秩指示和信道質量指示的取值範圍；接著，提齣高效LA方法，該方法僅在秩指示和信道質量指示的範圍內確定反饋參數，減少瞭後驗信榦比及等效信譟比的計算次數，從而降低瞭在線吞吐量預測的計算量；最後，倣真結果錶明，所提LA方法的吞吐量優于傳統LA方法，滿足鏈路服務質量併且穫得瞭3．5 dB吞吐量增益．
침대3 GPP LTE하행전수련로，연구질대접수정황하적고효련로자괄응（LA，Link Adapta-tion）방법．수선，급출질대접수후험신간비급등효신조비적계산방법；연후，이용전통LA방법학정질지시화신도질량지시적취치범위；접착，제출고효LA방법，해방법부재질지시화신도질량지시적범위내학정반궤삼수，감소료후험신간비급등효신조비적계산차수，종이강저료재선탄토량예측적계산량；최후，방진결과표명，소제LA방법적탄토량우우전통LA방법，만족련로복무질량병차획득료3．5 dB탄토량증익．
An efficient link adaptation (LA)scheme with turbo interference cancelation (IC)re-ceivers is proposed for the 3 rd generation partnership project long term evolution (3 GPP LTE ) downlink.First,the post signal-to-interference-plus-noise ratio (SINR)and effective signal-to-noise ratio (SNR)for turbo IC receivers are calculated.Secondly,the range of rank indication (RI)and channel quality indication (CQI)are calculated by using traditional the LA scheme.Thirdly,an ef-ficient LA scheme is proposed.This method calculates the feedback parameters only in the defined range of RI and CQI and reduces the number of post SINR and effective SNR calculation.The calcu-lated amount of online throughput prediction is then decreased.The simulation results show that the proposed scheme gets more throughputs compared to the traditional LA scheme and obtains 3 .5 dB gain.Meanwhile,the scheme is satisfied with the QoS (Quality of Service).
