Important Questions: Mobile Communication

UNIT 1:

Very Important:

Evolution of mobile communications

Frequency reuse

Interference and system capacity

Improving Coverage and capacity in Cellular systems

Important:

Examples of wireless communication systems

Hand off strategies






UNIT 2:

Very Important:

Reflection: Brewster angle method

Diffraction: Fresnel Zone geometry

Ground Reflection (Two-Ray) Model

Types of small scale fading (be thorough with any 3 methods)

Important:

Reflection: Other Methods

Diffraction: Other Methods

Practical Link budget design

Small scale Multipath propagation





UNIT 3:

Very Important:

MSK, GMSK

M-ary QAM, M-ary FSK and OFDM

Performance of Digital Modulation in Slow-Flat Fading Channels

Non-linear Equalization (both types)

RAKE receiver

Important:

Diversity Techniques

Survey of Equalization Techniques






UNIT 4:

Very Important:

Vocoders (all 4 types)

Linear Predictive Coders: LPC vocoders alone

GSM Codec

FDMA, TDMA, CDMA, SDMA

Important:

Selection of Speech Coders for Mobile Communication

Capacity of Cellular CDMA and SDMA.






UNIT 5:

Very Important:

Global System for MOBILE (GSM)

Digital European Cordless Telephone (DECT)

Important:

AMPS

Second Generation and Third Generation Wireless Networks