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RAJIV GANDHI PROUDYOGIKI VISHWAVIDYALAYA, BHOPAL
PROGRAMME: ELECTRONICS AND COMMUNICATION

SEMESTER -VII
COURSE: EC-7101 WIRELESS COMMUNICATION

Unit-I

Applications and requirements of wireless services: history, types of services, requirements for the services, economic and social aspects.

Technical challenges in wireless communications: multipath propagation, spectrum limitations, limited energy, user mobility, noise and interference-limited systems.

Propagation mechanism: free space loss, reflection and transmission, diffraction, scattering by rough surfaces, waveguiding.

Wireless Propagation channels Statistical description of the wireless channel: time invariant and variant two path models, small-scale fading with and without a dominant component, Doppler spectra, temporal dependence of fading, large scale fading.

Wideband and directional channel characteristics: causes of delay dispersion, system theoretic description of wireless channels,WSSUS model, condensed parameters, ultrawideband channels, directional description.

Channel models: Narrowband, wideband and directional models, deterministic channel-modelling methods.Channel sounding: Introduction, time domain measurements, frequency domain analysis, modified measurement methods, directionally resolved measurements.

Antennas: Introduction, antennas for mobile stations, antennas for base stations.

Transceivers and signal processing: Structure of a wireless communication link: transceiver block structure, simplified models.Modulation formats, demodulator structure, error probability in AWGN channels, error probability in flat-fading channels, error probability in delay and frequency-dispersive fading channels.

Diversity: Introduction, microdiversity, macrodiversity and simulcast, combination of signals, error probability in fading channels with diversity reception, transmit diversity.

Equalizers: Introduction, linear equalizers, decision feedback equalizers, maximum likelihood sequence estimation (Viterbi detector),comparison of equalizer structures, fractional spaced equalizers, blind equalizers.

1. A. F. Molisch: Wireless Communications, Wiley India Pvt. Ltd.

2. Taub and Schilling: Principles of Communication Systems, TMH.

3. Upena Dalal: Wireless Communication, Oxford University Press.

4. T. G. Palanivelu and R. Nakkereeran : Wireless and Mobile Communication, PHI Learning.

5. P. M. Chidambara Nathan: Wireless Communication, PHI Learning.