Maximum Throughput of Cognitive Relay Systems under Interference and Power Constraints

One of the greatest challenges in cognitive radio systems is power allocation of the secondary users for maximizing throughput. When the primary users give up the frequency bands, the secondary users utilize the spectrum holes. Furthermore, the secondary users can simultaneously occupy the spectrum with interference-aware. In this paper we consider approach of the spectrum interference to support the maximum throughput of the network. We investigate our method under one secondary user. To show the performance of our approach, we compare it with equal power allocation between the secondary user and relay.

Keywords:

cognitive radio , relay , energy detection , spectrum sensing , optimization