Abstract:Turbo codes are the most powerful and widely adopted error correcting codes in several communication applications. Turbo codes are used to detect and correct the error during transmission. Turbo codes were the first used codes that came close to the Shannon limit using reasonable effort. Firstly, the codes are interleaved. To reach a solution, the decoder can be divided into several simple decoders that exchange the information about the decoded bits. This paper presents the performance of turbo code system using BCJR algorithm under AWGN channel using different modulations. The performance results for the turbo code system through matlab simulation are considered which shows that the approximation to Shannon capacity can be achieved. The performance results for the turbo code system are obtained through matlab simulation channel.

Abstract: Biometric information is widely used in user identification systems. Iris is one of the most reliable and accurate biometric Information. In an iris recognition system, the iris localization is one the most important parts because the performance of an iris Recognition system is highly dependent on the accuracy of iris Localization.  Iris recognition is on automated method of biometric Identification that uses mathematical pattern-Recognition techniques on video and images of one or both of the irises of an individual’s eyes, whose complex random Patterns are unique, stable, and can be seen from some distance. Retina scanning a different, now obsolete, ocular-based Biometric technology for which iris recognition is often Confused with has been supplanted by iris recognition. Iris Recognition uses video camera technology with subtle near Infrared illumination to acquire images of the detail-rich, Intricate structures of the iris which are visible externally. Digital templates encoded from these patterns by mathematical and statistical algorithms allow the identification of an Individual or someone pretending to be that individual. Several Hundred millions of persons in several countries around the World have been enrolled in iris recognition systems for Convenience purposes such as passport-free automated border- Crossings, and some national ID programs. A key advantage of Iris recognition, besides its speed of matching and its extreme Resistance to false matches is the stability of the iris as an Internal and protected, yet externally visible organ of the eye.