课程名称︰无线网络基础与应用
课程性质︰选修
课程教师︰蔡欣穆
开课学院：电资学院
开课系所︰资工所、网媒所
考试日期（年月日）︰2016.04.29
考试时限（分钟）：
试题 :
1. Please calculate the maximum Doppler spread of the following system.
1. 4G LTE (using 700 MHz LTE band) on a high speed rail (300 km/h)
2. ETC (eTag) system that uses 902-928 MHz (car traveling speed 100 km/h)
2. Please calculate the minimum separation between antennas, if we were to use
spatial diversity for the above two systems.