Nowadays, it is hard to imagine daily life without connecting to cellular communications or wireless local area networks. People are not just accessing digital information in real time but also watching movies and enjoying multimedia data streaming services even in vehicles traveling at high speeds. Technically, contemporary wireless communications systems rely primarily on massive signal processing for orthogonal frequency division multiplexing and channel estimation/calibration, which has resulted in dramatically enhanced spectral efficiency and channel reliability. As society evolves toward a more data- and network-oriented world, data consumers and providers are seeking more advanced communications systems that offer larger data capacity. Therefore, a top priority is to find ways to overcome the limits on capacity due to narrow bandwidths. It is not easy to define the target throughput that should be accommodated in the next decade, but considering the new radio 5G cellular system offering up to 10 Gb/s, the huge spectral resources provided by submillimeter or terahertz (THz) wavebands are attracting a great deal of attention from research communities for future wireless communications systems [1], [2].

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太赫兹无线通信：包括用于短程数据下载的原型系统在内的最新发展

如今，很难想象没有连接到蜂窝通信或无线局域网的日常生活。人们不仅实时访问数字信息，而且即使在高速行驶的车辆中，也可以观看电影并享受多媒体数据流服务。从技术上讲，当代无线通信系统主要依靠大规模信号处理来进行正交频分复用和信道估计/校准，从而大大提高了频谱效率和信道可靠性。随着社会朝着更加面向数据和网络的世界发展，数据消费者和提供者正在寻求提供更大数据容量的更高级的通信系统。因此，当务之急是寻找克服带宽窄带来的容量限制的方法。