23EC1601 – WIRELESS COMMUNICATION
SYLLABUS
UNIT - I WIRELESS CHANNEL
Large scale path loss — Path loss models: Free Space and Two-Ray models -LinkBudgetdesign — Small scale fading- Parameters of mobile multipath channels —Timedispersionparameters-Coherence bandwidth — Doppler spread & Coherence time, fadingdueto Multipath time delay spread — flat fading — frequency selective fading—Fadingdue to Doppler spread — fast fading — slow fading.
UNIT II CELLULAR ARCHITECTURE
Multiple Access techniques for wireless communication - FDMA, TDMA, CDMA, SDMA.Cellular concept- Frequency reuse - channel assignment- hand off- interference&systemcapacity trunking & grade of service – Coverage and capacity improvement. Evolutionof5G and the Upcoming Utilization of 6G
UNIT III DIGITAL SIGNALLING FOR FADING CHANNELS
Structure of a wireless communication link, Principles of Offset-QPSK, π/4- DQPSK,Minimum Shift Keying, Gaussian Minimum Shift Keying, Modulation performanceinfadingand multipath Channels, Multicarrier Modulation -OFDM principle – Cyclicprefix,Windowing, PAPR. Introduction to OFDMA
UNIT IV MULTIPATH MITIGATION TECHNIQUES
Equalization – Adaptive equalization, Linear and Non-Linear equalization, Algorithmsfor Adaptive Equalization-Factors, Zero forcing, LMS Algorithms and RLSAlgorithms.Diversity – Micro and Macro diversity, Selection Diversity Feedback Diversity, Diversitycombining techniques, Rake receiver.
UNIT V MULTIPLE ANTENNA
MIMO systems – spatial multiplexing -System model -Pre-coding- IntroductiontoSpaceTime Modulation and Coding-Alamouti scheme- Beam forming –transmitter diversity,receiver diversity- Channel state information-capacity in fading and non-fadingchannels.Introduction to Massive MIMO.