1) Design and implementation of RF section for base transceiver station (BTS) in GSM mobile communication standard , ITRC, 1998-1999, (responsibility: designer of modulator and demodulator subsystems) 2) Fundamental researches on multimedia technology for new generation communication networks aiming H.264 video codec performance enhancement, ITRC, 2005-2007, (responsibility: co-manager) 3) Performance enhancement of image and video transmission systems using pre and post processing and JSCC techniques, Iran Telecomm Inc, 2008-2010, (responsibility: project manager)