Overview of wireless communications. Cellular systems: principles, trunking, grade of service and traffic capacity, power control, and handovers. Characterization of wireless channels: large scale and small scale propagation mechanisms, path loss, multipath and fading. Digital modulation techniques for wireless channels. Power efficiency, nonlinear amplifiers, diversity. Performance in multipath fading channels. Multiple access: fixed (FDMA, TDMA, CDMA) and random (ALOHA, CSMA) access methods.