09-10-2014, 11:37 AM
COGNITIVE RADIO BASED FEMTOCELL RESOURCE ALLOCATION
COGNITIVE.pptx (Size: 1.27 MB / Downloads: 8)
INTRODUCTION
70% of data traffic is generated indoors.
Poor voice quality and slow data rates
Problem can be alleviated by employing low power, short range, low cost, small BSs- femtocell network
PROPOSED SYSTEM MODEL
The Down Link of an OFDMA system is considered
Total channel bandwidth WT is divided into NFA frequency assignments(FAs), each of which comprises NSC sub-channels
The total channel bandwidth is divided into three FAs (i.e., FA1, FA2,and
COGNITIVE RADIO
Intelligent wireless communication system
Methodology: understanding-by-building to learn from the environment
Adapt its internal states to statistical variations in the incoming RF stimuli
Avoids interference with licensed or unlicensed users.
CONCLUSION
Effectively manage heterogeneous interference
Maximizes the femtocell throughput
Better SINR performance
Provides the spectral efficiency gain -fully reusing the spectrum resource