强激光与粒子束, 2017, 29 (6): 060101, 网络出版: 2017-06-21
21 km, 5 Gbps, 0.14 THz无线通信系统设计与试验
Design and tests of 21 km, 5 Gbps, 0.14 THz wireless communication system
太赫兹 无线通信 通信系统 通信试验 远距离通信 terahertz wireless communication communication system communication test long-range communication
摘要
设计了工作在太赫兹频段的无线通信系统, 基带部分采用16QAM调制体制, 射频部分采用混频器实现两级上下变频, 功放部分采用“固态功率放大+电真空器件放大”级联的功率放大技术, 实现了0.14 THz频段W量级的功率输出。接收端采用全固态常温接收技术, 接收机等效噪声温度为1100 K, 接收灵敏度达到-57 dBm。采用两个增益50 dBi的卡塞格伦天线, 在成都市双流区与新津县之间开展了距离21 km的无线通信试验, 单路实时通信速率达到5 Gbps, 误码率低于10-6。并成功同时实时传输了两路符合HD-SDI标准的无压缩高清视频数据流, 每一路的标准有效速率达到1.485 Gbps。
Abstract
A terahertz wireless communication system is designed. The 16QAM modulation scheme is used in baseband processing, and mixers are used for cascading frequency up and down-converting. Cascading power amplification technique is adopted with a solid-state power amplifier and a vacuum electronic device. Several watts power is emitted at 0.14 THz. An all solid-state receiver running in room temperature is used, whose equivalent noise temperature is 1100 K and receiving sensitivity is -57 dBm. A 21 km wireless communication testing is carried out between the Shuangliu district and the Xinjin county of Chengdu, by means of two Cassegrain antennas with 50 dBi gain each. A 5 Gbps single-channel transmission speed is measured with bit error rate below 10-6. For testing, two standard HD-SDI uncompressed video streams are successfully transmitted in real time simultaneously, with an effective speed of 1.485 Gbps for each one.
吴秋宇, 林长星, 陆彬, 缪丽, 邓贤进, 周浏阳, 陈洪斌, 蒋艺, 姚军, 张健. 21 km, 5 Gbps, 0.14 THz无线通信系统设计与试验[J]. 强激光与粒子束, 2017, 29(6): 060101. Wu Qiuyu, Lin Changxing, Lu Bin, Miao Li, Deng Xianjin, Zhou Liuyang, Chen Hongbin, Jiang Yi, Yao Jun, Zhang Jian. Design and tests of 21 km, 5 Gbps, 0.14 THz wireless communication system[J]. High Power Laser and Particle Beams, 2017, 29(6): 060101.