07-07-2012, 09:40 AM
SEMINAR ON 3G & 4G WIRELESS COMMUNICATION
[attachment=27021]
WHY 3G & 4G
NEED TO EXTEND MULTIMEIA TO WIRELESS
E-COMMERCE
PEER TO PEER NETWORKING
ASIAN MARKET
PROPOSED TECHNIQUES
ADAPTIVE MAODULATION AND CODING
HYBRID ARQ
MIMO
OFDM
ADAPTIVE MODUATION AND CODING
DISTANCE DEPENDENT
VARIABLE CODE LENGTH
CONVOLUTION CODES
MAXIMUM LIKELIHOOD DECODING (VITERBI)
MIMO/OFDM
MULTIPLE INPUT MULTIPLE OUTPUT
SMART ANTENNAS
ORHTOGONAL FREQUENCY DIVISION MULTIPLXING
HYBRID ARQ
ADDS REDUNDANCY ONLY WHEN NEEDED
RECEIVER SAVES FAILED TRANSMISSION ATTEMPTSTO HELP FUTURE DECODING
CONCLUSION
4G is still in formative stages. They may become commercially available in 2010.
Multimedia traffic will be dominant in the future. It is estimated that voice would contribute to only 20-30 % of total traffic in the future.
A modified IP will be the universal network layer protocol in the future.
Diverse array of applications like video conferencing, tele-medicine, video on demand etc.
The entire network would be digital and packet switched.
[attachment=27021]
WHY 3G & 4G
NEED TO EXTEND MULTIMEIA TO WIRELESS
E-COMMERCE
PEER TO PEER NETWORKING
ASIAN MARKET
PROPOSED TECHNIQUES
ADAPTIVE MAODULATION AND CODING
HYBRID ARQ
MIMO
OFDM
ADAPTIVE MODUATION AND CODING
DISTANCE DEPENDENT
VARIABLE CODE LENGTH
CONVOLUTION CODES
MAXIMUM LIKELIHOOD DECODING (VITERBI)
MIMO/OFDM
MULTIPLE INPUT MULTIPLE OUTPUT
SMART ANTENNAS
ORHTOGONAL FREQUENCY DIVISION MULTIPLXING
HYBRID ARQ
ADDS REDUNDANCY ONLY WHEN NEEDED
RECEIVER SAVES FAILED TRANSMISSION ATTEMPTSTO HELP FUTURE DECODING
CONCLUSION
4G is still in formative stages. They may become commercially available in 2010.
Multimedia traffic will be dominant in the future. It is estimated that voice would contribute to only 20-30 % of total traffic in the future.
A modified IP will be the universal network layer protocol in the future.
Diverse array of applications like video conferencing, tele-medicine, video on demand etc.
The entire network would be digital and packet switched.