Wireless Communications Channels: time-variant multipath fading, Doppler shift, fade rate, shadowing effect, time selective channel, frequency selective channel, the effects of fading on wireless transmission, performance analysis. Digital Transmission over Fading Channels: continues carrier-phase modulation, demodulations, performance analysis, burst-error correcting codes for fading channels, convolutional codes, soft output Viterbi algorithm, coded modulation, turbo principles, iterative processing, space diversity, time diversity and frequency diversity techniques. Wideband Transmissions: spread-spectrum communications, DS-CDMA, frequency hopping, OFDM techniques, their applications.