发表机构
China Mobile Research Institute; University of Macau; Shanghai Jiao Tong University; Southeast University（中国移动研究院; 澳门大学; 上海交通大学; 东南大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出基于像素天线的快速天线编码技术，通过动态控制PIN二极管开关状态调制辐射方向图，在4×4 MIMO系统中实现频谱效率提升12 bits/s/Hz、能量效率提升33%。
AI 中文摘要
本文研究了一种基于像素天线的快速天线编码技术。天线编码是一种通过动态控制PIN二极管的开关状态来调整像素天线辐射方向图的技术。通过在基带符号周期内切换天线编码器，该技术可以在波束空间中调制辐射方向图上的信息。这使得像素天线能够传输额外信息，从而提升多输入多输出（MIMO）系统的频谱效率（SE）。具体而言，本文首先介绍了像素天线和快速天线编码的概念。然后，基于波束空间信道表示，我们给出了采用快速天线编码的MIMO系统模型，并推导了频谱效率和误码率（BER）。同时，展示了快速天线编码所带来的频谱效率提升。此外，还提出了一种优化方法，用于获取能够生成快速天线编码所需期望辐射方向图的天线编码器。利用优化后的天线编码器，我们评估了采用快速天线编码的MIMO系统的频谱效率、能量效率（EE）和误码率。仿真结果表明，对于4×4 MIMO系统，与传统MIMO相比，频谱效率提升了12 bits/s/Hz，能量效率可提升33%，证明了快速天线编码技术的有效性。
英文摘要
A fast antenna coding technique based on pixel antennas is investigated. Antenna coding is a technique that dynamically controls the ON/OFF states of PIN diodes to adjust radiation patterns of pixel antennas. By switching the antenna coder at the baseband symbol period, this technique can modulate information on the radiation patterns in the beamspace. This allows the pixel antenna to transmit additional information, thereby enhancing the spectral efficiency (SE) of multiple-input multiple-output (MIMO) systems. Specifically in this work, we firstly introduce the concept of pixel antenna and the fast antenna coding. Then based on the beamspace channel representation, we provide the system model of MIMO with the fast antenna coding and derive the SE and bit error rate (BER). The SE enhancement achieved by fast antenna coding is also demonstrated. An optimization approach is also presented for obtaining the antenna coders that can generate the desired radiation patterns for fast antenna coding. Using the optimized antenna coders, we evaluate the SE, energy efficiency (EE), and BER of MIMO systems with fast antenna coding. The simulation results show that for a 4-by-4 MIMO system, SE is enhanced by 12 bits/s/Hz and EE can be improved by 33\% when compared with conventional MIMO, demonstrating the effectiveness of the fast antenna coding technique.
