In this paper, we propose several power allocation schemes for multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) transmission based on the minimization of an approximated bit error rate (BER) expression and we evaluate the different solutions via field trial experimentations. The methods illustrated in this paper, serve to allocate power among the different trans...

How the air around you is sold for Billions of Dollars? Spectrum being a very scarce natural resource of a country has to be judicially used for the purpose of nation building and the allocation process to telecom operators should be very transparent and ethical. There are various ways of how spectrum can be allocated and there is no best way that can be adopted universally. The market situatio...

Performance comparison between elastic optical networks and multi-rate optical networks, using different spectrum allocation algorithms to prevent fragmentation.

Application layer firewalls protect the trusted area network against information security risks. However, firewall performance may affect user experience. Therefore, performance analysis plays a significant role in the evaluation of application layer firewalls. This paper presents an analytic model of the application layer firewall, based on a system analysis to evaluate the capability of the f...

The most challenging task of managing Frequency Division Multiple Access (FDMA) based cellular networks is to allocate the frequencies to the cells efficiently. In practical scenario, the number of frequencies that are available for allocation to the cells is finite. As a result the system could not satisfy the requirements of the cells as per their demands. As a result, some of the new calls d...

We design truthful double spectrum auctions where multiple parties can trade spectrum based on their individual needs. Open, market-based spectrum trading motivates existing spectrum owners (as sellers) to lease their selected idle spectrum to new spectrum users, and provides new users (as buyers) the spectrum they desperately need. The most significant challenge is how to make the auction econ...

Spectrum is a limited and precious resource in wireless communications. Effective spectrum utilization becomes more and more important because of the expeditious increase of demand for wireless communications. In principle, the dual-polarization frequency reuse system, which employs two orthogonally polarized electromagnetic waves to carry information, can double the system capacity. However, t...