1.Ultra-wideband interference mitigation using cross-layer cognitive radio 2.Time-varying interference spectral analysis for Cognitive UWB networks 3.Cosine Modulated Filterbank Technique for Cognitive UWB 4.Coexistence Issues in Cognitive R

Ef
cient Algorithms for Adaptive Capon and APES Spectral Estimation

This article outlines the basic principles of OFDM-IDMA. Comparisons with other alternative technologies such as OFDM-CDMA and OFDMA are provided. Some attractive features of OFMD-IDMA are explained, including lowcost iterative multi-user detection,

The increasing need for high data-rate transmissions over time- or frequency-selective fading channels has drawn attention to modulation schemes with high spectral efficiency such as QAM. With the aim of increasing the “diversity order” of the signal