迭代接收下高效链路自适应传输方法  

Efficient link adaptive transmission scheme with turbo IC receivers

作　　者：薛昀[1] 姜帆[1] 江彬[1] 高西奇[1] 

机构地区：[1]东南大学国家移动通信重点实验室,南京210096

出　　处：《东南大学学报（自然科学版）》2014年第1期1-6,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(60925004;61201171);国家高技术研究发展计划(863计划)资助项目(2012AA01A506);中国博士后科学基金资助项目(2012M511174)

摘　　要：针对3GPP 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 Adaptation)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.An efficient link adaptation （LA） scheme with turbo interference cancelation （IC） re- ceivers is proposed for the 3rd generation partnership project long term evolution （3GPP 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 （R/） 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 ~ain. Meanwhile. the scheme is satisfied with the OnS （Onnlitv nf Rervie~

关 键 词：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 

分 类 号：TN929.5[电子电信—通信与信息系统]