Abstract—The performance of cognitive radio systems will depend critically on the ability of the secondary user to relinquish borrowed spectrum when it’s interference level at the primary user exceeds a certain threshold. Hence, in this paper we investigate the temporal behaviour of this interference power. In particular, we derive the level crossing rate (LCR) of the power. This gives the rate at which a cognitive radio’s interference level increases above the acceptable threshold. The LCR is derived for the case of lognormal shadow fading and two different mobility models. The results cater for temporal variations in both shadowing and distance. The basic nature of the LCR appears to be insensitive to the mobility model and suggests that ...
In this paper, the quantity of interference on the primary user (PU) caused by the secondary user (S...
Abstract—Due to the ever growing need for spectrum, the cognitive radio (CR) has been proposed to im...
In this paper, we propose a simple method to evaluate the achievable rate of a realistic cognitive r...
Abstract-In this paper we describe the effect of imperfections in the radio environment map (REM) in...
In this paper we consider the capacity of the cognitive radio (CR) channel in a fading environment u...
In this paper we deal with the issues of statistical modeling of the aggregate interference due to c...
Abstract—Accurately characterizing the time-varying interfer-ence caused to the primary users is ess...
Increased spectrum efficiency has been demonstrated with the use of cognitive radios, however with i...
Accurately characterizing the time-varying interference caused to the primary users is essential in ...
Abstract—In this paper we consider the capacity of the cog-nitive radio (CR) channel in a fading env...
Abstract—Opportunistic spectrum access creates the opening of under-utilized portions of the license...
Substantial spectrum gains have been demonstrated with the introduction of cognitive radio however; ...
In this paper, the quantity of interference on the primary user (PU) caused by the secondary user (S...
The objective of this work is to assess some fundamental limits for opportunistic spectrum reuse via...
Abstract—Cognitive radio (CR) has attracted significant at-tention due to expected radio frequency (...
In this paper, the quantity of interference on the primary user (PU) caused by the secondary user (S...
Abstract—Due to the ever growing need for spectrum, the cognitive radio (CR) has been proposed to im...
In this paper, we propose a simple method to evaluate the achievable rate of a realistic cognitive r...
Abstract-In this paper we describe the effect of imperfections in the radio environment map (REM) in...
In this paper we consider the capacity of the cognitive radio (CR) channel in a fading environment u...
In this paper we deal with the issues of statistical modeling of the aggregate interference due to c...
Abstract—Accurately characterizing the time-varying interfer-ence caused to the primary users is ess...
Increased spectrum efficiency has been demonstrated with the use of cognitive radios, however with i...
Accurately characterizing the time-varying interference caused to the primary users is essential in ...
Abstract—In this paper we consider the capacity of the cog-nitive radio (CR) channel in a fading env...
Abstract—Opportunistic spectrum access creates the opening of under-utilized portions of the license...
Substantial spectrum gains have been demonstrated with the introduction of cognitive radio however; ...
In this paper, the quantity of interference on the primary user (PU) caused by the secondary user (S...
The objective of this work is to assess some fundamental limits for opportunistic spectrum reuse via...
Abstract—Cognitive radio (CR) has attracted significant at-tention due to expected radio frequency (...
In this paper, the quantity of interference on the primary user (PU) caused by the secondary user (S...
Abstract—Due to the ever growing need for spectrum, the cognitive radio (CR) has been proposed to im...
In this paper, we propose a simple method to evaluate the achievable rate of a realistic cognitive r...