异构网络中协作多点鲁棒性波束成形设计

发布时间：2018-05-14 10:08

本文选题：异构网 + 协作多点　；参考：《实验室研究与探索》2017年02期

【摘要】：异构网络可以极大提高第5代移动通信系统的性能,但是不同的低功率节点却使得整个网络中小区间的干扰变得更加复杂,已有的干扰协调技术已经不是解决此类干扰问题的最优方法。将协作多点(CoMP)传输技术引入异构网络可以消除不同小区间的干扰,但是,由于基站间的回程链路存在开销时延以及信道的估计、量化过程均存在误差,干扰消除效果变差。为了减小3种非理想因素对干扰消除的影响,考虑了信道估计误差、量化误差和基站间协作开销时延,设计了收发联合的鲁棒性波束成形。通过Matlab仿真结果表明,相较于传统的块对角化波束成形算法,该算法更好地消除了小区间干扰,系统的吞吐量和误码率性能得到明显改善。
[Abstract]:Heterogeneous networks can greatly improve the performance of the 5th generation mobile communication systems, but different low-power nodes make the intercellular interference in the whole network more complex. The existing interference coordination technique is no longer the best method to solve this kind of interference problem. Introducing cooperative multipoint CoMP-based transmission technology into heterogeneous networks can eliminate interference from different cells. However, due to the overhead delay and channel estimation in backhaul links between base stations, there are errors in the quantization process, so the interference cancellation effect becomes worse. In order to reduce the influence of three kinds of non-ideal factors on interference cancellation, the channel estimation error, quantization error and cooperative overhead delay between base stations are considered, and the robust beamforming of transceiver joint is designed. The Matlab simulation results show that compared with the traditional block diagonalization beamforming algorithm, the proposed algorithm eliminates inter-cell interference better and improves the throughput and bit error rate performance of the system.
【作者单位】：国网冀北电力有限公司技能培训中心;华北电力大学电气与电子工程学院;
【基金】：国家自然科学基金项目(61501185;61302105) 中央高校基本科研业务专项基金项目(13MS67)
【分类号】：TN929.5

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