Dual - Hop Network with Cooperative Communication

The paper deals to proposed a cooperative communications to exploit spatial diversity gains inherent in multi-user wireless systems without the need of multiple antennas at each node. Transmit diversity generally requires more than one antenna at the transmitter. However, many wireless devices are limited by size or hardware complexity to one antenna. Which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones. The proposed work optimizes the use of available radio-frequency (RF) spectrum while minimizing interference to other users. In its most basic form, CR is a hybrid technology involving software defined radio (SDR) as applied to spread spectrum communications.