In some channels subject to crosstalk or other types of additive interference, the noise is the sum of a dominant Gaussian noise and a relatively weak non-Gaussian contaminating noise. Although the capacity of such channels cannot be evaluated in general, we analyze the decrease in capacity, or sensitivity of the channel capacity to the weak contaminating noise. The main result of this paper is...

Reduction in channel capacity can trigger an increase in flood hazard over time. It represents a geomorphic driver that competes against its hydrologic counterpart where streamflow decreases. We show that this situation arose in the Guadalquivir River (Southern Spain) after impoundment. We identify the physical parameters that raised flood hazard in the period 1997–2013 with respect to past yea...

We consider the information theoretical capacity of the network flow watermarking problem. Finding capacity bounds of the watermarking problem can lead to compare different watermarking schemes and help in designing more efficient network flow watermarks.

Conventional trisectored cellular systems have not taken full advantages of antenna directivities to enhance frequency reuse efficiency. A novel Channel Alternation and Rotation (CAR) scheme is proposed to coordinate channel assignments with antenna directivities. CAR employs a multi-interval cellreuse layout. Each cell type is allocated extra channel set(s) to provide network designers the fle...

Optimization of handover boundaries has been suggested to cope with non-homogeneous traffic distribution in GSM/GPRS networks. In this paper, an automatic optimization algorithm is proposed, which is able to maximize the overall traffic carried in the network by equalizing long-term blocking effects. Field trial results indicate that system capacity can be significantly improved with respect to...

Channel capacity of multi-element communication systems in independent Rayleigh channels has been shown to scale linearly with the number of antennas. In reality, the signals received by different receiver antennas can be correlated with each other due to the non-uniform scattering environment and limited aperture of the antenna system. In this paper, the effect of spatial correlation between r...