In a recent paper, it is shown that if Pearl's belief propagation algorithm is applied to the Bayesian belief network of a turbo code, the turbo decoding algorithm immediately results. From this perspective, it is recognized that the turbo coding structure imposes unnecessary diierentiation on the parity checks and the turbo decoding algorithm speciies a seemingly arbitrary sequential activatio...

Recent studies have shown that Space-Time code is an effective approach to increasing the data rate over wireless channels. Turbo-based Space-Time codes take advantage of both the diversity techniques of Space-Time systems and the randomness of the Turbo codes. In this paper, we compare two Turbo-based Space-Time Codes and their approximate versions with respect to energy consumption and perfor...

We present an approach to design of fault tolerant computing systems. In this paper, a technique is employed that enable the combination of several codes, in order to obtain flexibility in the design of error correcting codes. Code combining techniques are very effective, which one of these codes are turbo codes. The Algorithm-based fault tolerance techniques that to detect errors rely on the c...

Abstract A key component in Hybrid Laminar Flow Control (HLFC) is a turbo-compressor, which requires an inverter. However, harsh environment combination with restrictive boundary conditions make the inverter design very challenging. Moreover, aviation certification standards have to be considered. By reason of its growing significance, Model-Based Systems Engineering (MBSE) approach described b...

Turbo code is a great achievement in the field of communication system. It can be created by connecting a turbo encoder and a decoder serially. A Turbo encoder is build with parallel concatenation of two simple convolutional codes. By varying the number of memory element (encoder configuration), code rate (1/2 or 1/3), block size of data and iteration, we can achieve better BER performance. Tur...

In this paper, energy efficient VLSI architectures for linear turbo equalization are studied. Linear turbo equalizers exhibit dramatic bit error rate (BER) improvement over conventional equalizers by enabling a form of joint equalization and decoding in which soft information is iteratively exchanged between the equalizer and decoder. However, turbo equalizers can be computationally complex and...

Turbo-code is known as the powerful error correcting code. The principle of turbo-code, which is the concatenated convolutional code, makes it possible to control the code rate by the use of the puncturing. When the puncturing is applied, the reliability of the decoded bits is not uniform over a frame, because some bits are decoded using only received information bits, and the others are decode...

In the development of wireless communication system, towards error free coding, turbo coding were effectively been used. Turbo coding has an advantage of error detection based on the parity bit coding which improves the error performance in communication system. In the practical realization of such system, turbo chips were developed embedding onto a communication unit, performing the operation ...

This paper presents a Turbo Multiuser Detector for Turbo-Coded DS-CDMA systems, based on the utilization of a PIC and a bank of turbo decoders, in which the PIC performs interference cancellation after each constituent decoder of the turbo decoding scheme. Moreover, the soft output of turbo decoders are used iteratively to improve the updating step of the channel parameter estimation which is f...

apitalizing on the tremendous per formance gains of turbo codes and the turbo decoding algorithm, turbo equalization is an iterative equalization and decoding technique that can achieve equally impressive performance gains for communication systems that send digital data over channels that require equalization, i.e., those that suffer from intersymbol interference (ISI). In this article, we dis...