Performance of terahertz channel with multiple input multiple output techniques

作     者：M.Bharathi S.Sasikala J.Vanmathi M.Bharathi;S.Sasikala;J.Vanmathi

作者机构：Kumaraguru College of Technology Coimbatore India 

出 版 物：《红外与毫米波学报》 (Journal of Infrared and Millimeter Waves)

年 卷 期：2017年第36卷第6期

页      面：641-645页

核心收录：

学科分类：050302[文学-传播学] 1205[管理学-图书情报与档案管理] 12[管理学] 120501[管理学-图书馆学] 05[文学] 120502[管理学-情报学] 0503[文学-新闻传播学] 

主　　题：《红外与毫米波学报》 期刊 编辑工作 发行工作 

摘      要：Terahertz(THz) communication is being considered as a potential solution to mitigate the demand for high bandwidth. The characteristic of THz band is relatively different from present wireless channel and imposes technical challenges in the design and development of communication systems. Due to the high path loss in THz band,wireless THz communication can be used for relatively short distances. Even,for a distance of few meters( 5 m),the absorption coefficient is very high and hence the performance of the system is poor. The use of multiple antennas for wireless communication systems has gained overwhelming interest during the last two *** Input Multiple Output( MIMO) Spatial diversity technique has been exploited in this paper to improve the performance in terahertz band. The results show that the Bit Error Rate( BER) is considerably improved for short distance( 5 m) with MIMO. However,as the distance increases,the improvement in the error performance is not significant even with increase in the order of diversity. This is because,as distance increases,in some frequency bands the signal gets absorbed by water vapor and results in poor transmission. Adaptive modulation scheme is implemented to avoid these error prone frequencies. Adaptive modulation with receiver diversity is proposed in this work and has improved the BER performance of the channel for distance greater than 5 m.