Mahmoud Abdullahi

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
—Multiple input multiple output-Orthogonal frequency division multiplexing (MIMO-OFDM) is a viable solution for providing high data rate services in harsh channel environments. The optimum receivers for them are those based on the maximum likelihood criterion. However, they have a prohibitive complexity especially when channel dimensions are high and coding(More)
Switching off network links/nodes for energy efficiency is no longer a new thing to the Internet community but the important thing is its dynamic deployment. Up until now, the normal paradigm in energy aware traffic engineering is to deploy a pruned network topology based on historic traffic matrices or to manipulate, on the fly, the traffic routings based(More)
Cognitive Radio threshold optimization has been an ongoing research concern. With mature energy detector algorithms, the CR implemented in this work uses an energy detector as the primary sensing module for the primary user signal. In order to achieve this detection in an efficient way, various techniques have been proposed in literature for optimization(More)
In this paper, we will examine the effects of Carrier Frequency Offset (CFO) on the OFDM signals. We will also show the deterioration in Bit Error Rate (BER) as well as the loss in Signal to Noise Ratio (SNR) due to the CFO for an OFDM system. The paper also presents comparative analysis between three different CFO estimation methods namely: Cyclic Prefix(More)
  • 1