Due to their near Shannon-capacity performance, turbo codes have received a considerable amount of attention since their introduction [1]. They are particularly attractive for cellular communication systems and have been included in the specifications for both the WCDMA (UMTS) and cdma2000 third-generation cellular standards. At this time, the reasons for the superior performance of turbo codes...

In this paper, we study the convergence properties of low-complexity (2and 4-state) multiple turbo codes on an AWGN channel. An analytical approach to determine the extrinsic information transfer characteristics of 2-state codes is presented. This is then used to compute the convergence thresholds of several rate 1/2, 2-state multiple turbo codes. The convergence thresholds predicted by the ana...

Since its application to the NGL process in 1964, the turbo-expander based demethanizer process has been the workhorse of many gas plants. The turbo-expander process isentropically expands the gas through a high speed turbine to create cryogenic temperatures facilitating the separation of ethane and heavier components from the methane. This process also uses significant heat integration to redu...

In recent years, numerous turbo-roundabouts have been built in many European countries. To date, there are no Italy and even the regulations do not provide for their implementation. Turbo-roundabouts considered ideal alternative to multi-lane roundabouts as they advantages. However, offer better operational performance only specific traffic flow distributions. This research used case study of a...

The improved BER was achieved by inhibiting 1/3 rated Turbo coder instead of 1/2 rated Turbo coder. It was accomplished by sending the output from 1/3 rated Turbo encoder to serial to parallel converter. The output from serial to parallel converter was inhibited to various Adaptive modulation schemes like m-aryPSK, m-aryQAM, m-aryCPM, and m-aryMHPM system. The modulated output was then fed to m...

Abstract The mode of exhaust gas recirculation (EGR) and the flow recirculated greatly impact heat recovery mechanical turbo-compound. A matching turbo-compound diesel engine is established with GT-power software to study effect EGR rate on it, working performance under high-pressure low-pressure also studied. results show that compared original engine, effective thermal efficiency matched has ...

The purpose of this study is to construct a near capacity Irregular-Turbo Code (I-TC) and to evaluate its performance over Gaussian channel. The methodology used to evaluate and measure the performance of the new design is by simulating the system by developing a software platform using MATLAB. The simulation carried out by implementing the system over different modulation schemes, different fr...

Random coding bounds are obtained for multiple-input multiple-output (MIMO) fading channels. To derive the result in a compact and easy-to-evaluate form, a series of combinatorial codeword enumeration problems are solved for input-constrained MIMO fading channels. The bounds obtained in this paper are shown useful as performance prediction measures for MIMO systems which employ turbo-like block...

We study here rigorous analytical upper bounds on the block and bit error probabilities of ML decoded block codes, operating over fully interleaved Rician fading channels. The proposed improved bounding technique is a modified and generalized version of the recently introduced bounds for the AWGN channel by Duman and Salehi, which are based on modifying the classical Gallager technique. The adv...