EB_Propsim_F8.pdf

Copyright Elektrobit (EB) 2010 / Company confidential Zang Kan 10/03/2011 EB Propsim ? F8 Channel Emulator Technical Overview Copyright Elektrobit (EB) 2010 / Company confidential 今日EB ? EB的客户为全球无线通信与汽车电子行业的 领先企业 ? EB 提供优秀的硬件与嵌入式软件的解决方案 ? EB的核心技术竞争力在于： – 无线技术与解决方案 – 系统与软件架构 – 汽车电子软件 ? 为赫尔辛基证券交易所的上市公司 ? 在全球三个大洲，7个国家拥有超过1700名员 工 Copyright Elektrobit (EB) 2010, Company confidential , 10 March 2011, Slide 3 Wireless propagation environment Radio wave propagation ? The sine wave is the most basic building block of a radio wave signal )2sin()( θπ += ftAty Amplitude Time Phase difference Period Reflection AbsorptionScattering Propagation effects ? Radio waves interact with objects in their propagation path in many ways – Scattering – Diffraction – Reflection – Absorption Diffraction Shadowing ? Large obstructions between a transmitter and a receiver can block the main signal path Base station Mobile station Mobile route Multipath propagation ? MPCs combine constructively and destructively at the receiving antenna ? Each MPC has random properties – Amplitude – Phase – Direction of arrival (DoA) – Propagation delay ? Resulting signal is the vector sum of all MPCs a1 a2 a3 a1+a2+a3 Vector sum of all multipath components Doppler effect ? A mobile receiver experiences a frequency shift relative to the receiver speed ? In many mobile communication systems the terminals can move at vehicular speeds BS Mobile route MS Transmitted signal Transmitted signal Transmitted frequency Received signal Received frequency Shift Different scales of propagation Distance Received Amplitude Path attenuation Shadowing Fast fading Frequency response ? MPCs on different frequencies do not experience the same attenuation and phase shift Copyright Elektrobit (EB) 2010, Company confidential , 10 March 2011, Slide 11 Platform Features Copyright Elektrobit (EB) 2010, Company confidential , 10 March 2011, Slide 12 Replacing the Radio Channel with EB Propsim ? F8 ? EB Propsim ? F8 emulates a real