摘要
针对毫米波大规模MIMO系统采用全数字预编码时,系统所需射频链路数量较大而导致实现成本和能耗较高的问题,提出了一种在基站端和用户端分别采用混合预编码和模拟合并的方案。在充分考虑信道特性的基础上,根据收发两端的天线阵列响应矢量分别设计模拟预编码矩阵和模拟合并矩阵,然后根据生成的有效信道矩阵,在基带部分设计低维的数字预编码,从而消除系统中噪声和用户间干扰的影响。仿真结果表明,在有效减少系统所需射频链路数量的基础上,所提混合预编码方案能够接近传统全数字预编码方案的性能。
The high cost of system and high power consumption of the traditional full digital precoding in mm Wave massive MIMO systems was studied, which caused by a large number of radio frequency（RF） chain. A scheme with hybrid precoder at base station and analog combiner at user terminal was proposed. Based on the consideration of the channel characteristic, the analog precoding vectors and analog combining vectors were designed according to the antenna array response vectors of transmitting and receiving ends, respectively. Then a low dimension digital precoding was used to eliminate the influence of system noise and inter-user interference on the basis of the effective channel matrix. Simulation results show that, on the basis of effectively reducing the number of RF chain required by the system,the proposed hybrid precoding algorithm approach the performance of the full digital precoding.
出处
《电信科学》
北大核心
2017年第3期29-35,共7页
Telecommunications Science
基金
国家自然科学基金资助项目(No.61363076)
江西省自然科学基金资助项目(No.20142BAB207020)~~
