无蜂窝大规模MIMO无线传输技术研究

由于传输能量的效率较低,导致MIMO系统整体数据传输效率也处于较低水平,为此,提出无蜂窝大规模MIMO无线传输技术研究。在对MIMO系统的发送端进行预编码处理阶段,采用了ZF线性预编码技术对,通过建立传输信道之间的渐近正交关系,消除MIMO系统中不同用户之间的相互干扰作用,降低无效传输能量消耗的总量。以MIMO系统的最大和容量作为用户调度的基准,采用穷举搜索算法实现对用户的最优调度,使得MIMO系统同时服务用户数量为其可执行的最大值。测试结果表明,设计传输技术下,平均能量效率始终稳定在61.44 bps/Hz/Joule以上,实际传输效率与理论值相比,接收功率最大差值仅为2.41d Bm,SNR最大差值仅为2.98d B。

Due to the low efficiency of transmission energy, the overall data transmission efficiency of MIMO system is also at a low level. Therefore, the research on cellless large-scale MIMO wireless transmission technology is proposed. In the stage of precoding the transmitter of the MIMO system, ZF linear precoding technology is adopted. By establishing the asymptotic orthogonal relationship between transmission channels, the mutual interference between different users in the MIMO system is eliminated, and the total amount of invalid transmission energy consumption is reduced. Taking the maximum and capacity of the MIMO system as the benchmark of user scheduling, the exhaustive search algorithm is used to achieve the optimal scheduling of users, so that the number of users simultaneously served by the MIMO system is the maximum of its executable value. The test results show that under the designed transmission technology, the average energy efficiency is always stable above 61.44 bps/Hz/Joule. Compared with the theoretical value, the maximum difference between the actual transmission efficiency and the theoretical value is only 2.41 d Bm for the received power and 2.98 d B for the SNR.