This paper describes an adaptive algorithm for power and bit allocations in a multiple user Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) system operating in a frequency selective ...

This paper is a sequel to an earlier study on scheduling real-time traffic in wireless TDMA channels. In particular, we develop mathematical analysis to model the system behavior of the equal-delay scheme and its extension ...

Arbitrary ratio sampling rate conversion (SRC) structure using B-spline interpolation is proposed for software defined radio (SDR) in this paper. By combining SRC with SDR's transmitter/receiver filter, the constraint on ...

Wireless relay has been proposed as the solution to extend the coverage of a single base station. In this paper, capacity degradation due to multi-hop relay has been analyzed in a WiMAX relay system. It has been shown that ...

In this paper, we consider the problem of scheduling real time services over time-varying wireless links in broad-band wireless networks where an Adaptive Modulation and Coding (AMC) scheme is applied in the physical layer ...

This paper addresses an in-depth analysis of the stratosphere-to-Earth co-channel interference produced by highaltitude platforms (HAPs) and proposes a new methodology for the evaluation of its impact to terrestrial systems ...

In this paper, we compare various transmission schemes, as described by the covariance matrix of transmitted signals, for a Multiple Input Multiple Output (MIMO) system operating under Rician channel conditions. It is shown ...

The already intensive use of the radiofrequency spectrum for wireless communication systems continues to increase. The success of wireless communications and the integral part they now play in our modern society is, in ...

As wireless technologies are competing with wired solutions in delivering information, there is a clear shift of e-learning towards mobile learning (m-learning). M-learning, which involves both wireless communications and ...

In this paper de-noising techniques are investigated in connection with secure wideband chaotic communication systems. An alternate version of the recently proposed Ueda chaotic communication system based on the initial ...