Wireless Channel Emulation Method With Variable Bandwidth and High Precision Delay

Wireless channel emulation is becoming increasingly important where system performance highly depend on the accurate representation of channel conditions. This paper presents the design and implementation of a wireless channel emulation method with variable bandwidth and high precision delay. The proposed emulation method consists of integer delay, fractional delay and amplitude fading process. In particular, this method applies a variable bandwidth and fractional delay filter that improves the accuracy and convenience of channel emulation compared with conventional channel emulation. A computational complexity analysis is performed to compare the performance of different implement structures.