1. Communication Systems EE SUMMER CAMP ‘06 Binit Mohanty Ketan Rajawat

2. Communication Meaningful exchange of Information between two bodies. Speed Reliability Quantity Security

3. A Communication System Data SourceSource CodingNetworkingChannel Coding ModulationPre-Processing Tx Up-Conversion Channel Rx Dn-Conversion Synchronization Channel Estimation Complementary Processes

4. Source Coding To reduce the size of the message Exploits “redundancy” in the message Areas Used: Probability, Math (of MTH 102N type)

5. Networking Routing : To plan a route for the message to be conveyed Find the “best” path –Network considerations –Congestion –Speed Statistics, Algorithm Design

6. Channel Coding Ensure fidelity of the transmitted signal Adds “redundancy” Linear Algebra, Algorithm Design

7. Modulation & Preprocessing How to send Digital signals in Analog channel? Pulse Shaping: Some signals are more “practical” and “tractable” than others Signals and System, DSP

8. Transmitter How will you “send” the signal? Involves Microelectronics, Microwave Engg etc Is not of primary concern to Comm!

9. Channel Wired –Additive White Gaussian Noise (AWGN) Wireless –AWGN –Fading –Doppler Statistics, Experimental Modelling

10. Receiver Similar to Transmitter!

11. Synchronization Time synchronization Frequency synchronization Signals and Systems, Linear Algebra

12. Channel Estimation Only in case of wireless Knowledge of channel may help in –Power Control –Rx/Tx Decisions –Pulse shaping Probability and Statistics, Modelling