The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we propose a design of turbo code with good convergence behavior for the half-duplex relay channel. Our approach is based on the density evolution of extrinsic information of turbo decoders. We present an approach to calculate the decoding thresholds of turbo codes used in relay channel. We have searched for good turbo codes in fully interleaved Rayleigh fading channels and determined...
In this paper, we address the design of turbo codes employing nonsystematic constituent encoders. Nonsystematic encoders have superior effective free distances compared to equivalent systematic encoders of the same complexity, and hence they are capable of achieving lower error floors. We derive bounds on the effective free distance of turbo codes employing nonsystematic constituent encoders and compare...
The paper presents an exponential pheromone deposition approach to improve the performance of classical ant system algorithm which employs uniform deposition rule. A simplified analysis using differential equations is carried out to study the stability of basic ant system dynamics with both exponential and constant deposition rules. A roadmap of connected cities, where the shortest path between two...
The paper presents a novel concept of improving the convergence speed and solution quality of particle swarm optimization algorithm by Lyapunov modeling of fitness function. Most of the fitness functions that appear in practice can be transformed into positive definite function by using some minor transformations and shifting the coordinates system in the multidimensional space. The paper demonstrates...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.