CAJ | 학술논문

该文针对长期演进(LTE)上行单载波频分多址(SC-FDMA)多小区系统的性能受限于小区间干扰的问题，提出一种综合考虑协作调度和功率控制的方案。该方法分步执行小区间的协作调度和功率控制，首先调度各小区中的用户，在此基础上优化用户的发射功率。调度时首先估计小区间的干扰信息并分配频率资源块给每个小区内的用户，在优化用户的发射功率时，同时考虑由于用户功率改变所造成的目标小区和其他干扰小区性能的变化。进一步提出一种低复杂度功率控制方案，在优化目标小区用户的功率时，只考虑受目标小区干扰影响最大的几个小区性能的变化，其他干扰小区性能的变化则通过引入补偿因子来估计。计算机仿真验证了该文所提方法在系统吞吐量和小区边缘吞吐量方面的性能优势显著。
해문침대장기연진(LTE)상행단재파빈분다지(SC-FDMA)다소구계통적성능수한우소구간간우적문제，제출일충종합고필협작조도화공솔공제적방안。해방법분보집행소구간적협작조도화공솔공제，수선조도각소구중적용호，재차기출상우화용호적발사공솔。조도시수선고계소구간적간우신식병분배빈솔자원괴급매개소구내적용호，재우화용호적발사공솔시，동시고필유우용호공솔개변소조성적목표소구화기타간우소구성능적변화。진일보제출일충저복잡도공솔공제방안，재우화목표소구용호적공솔시，지고필수목표소구간우영향최대적궤개소구성능적변화，기타간우소구성능적변화칙통과인입보상인자래고계。계산궤방진험증료해문소제방법재계통탄토량화소구변연탄토량방면적성능우세현저。
Inter-cell interference is a major factor that limits the performance of multi-cell systems. In this paper, a cooperative scheduling and power control algorithm for Single-Carrier Frequency-Division Multiple Access (SC-FDMA) multi-cell systems is proposed to deal with the inter-cell interference in Long Term Evolution (LTE) uplink. It performs scheduling and power control for each cell separately, which schedules users first and then configures the transmit power for each user. The proposed algorithm performs scheduling by first estimating the inter-cell interference and then assigning resources to users. When optimizing the user’s transmit power, the performance variation of both the objective cell and other interfering cells is considered. Furthermore, a power control algorithm with low-complexity is proposed, which only considers the performance change of several cells interfered most by the objective cell and estimates the performance change of all other cells by introducing a compensation factor, when optimizing the transmit power of each user. Simulation results demonstrate the effectiveness of the proposed algorithm in cell average and cell edge throughput.