A design of rate-compatible polar codes suitable for HARQ communications is proposed in this paper. An important feature of the proposed design is that the puncturing order is chosen with low complexity on a base code of short length, which is then further polarized to the desired length. A practical ratematching system that has the flexibility to choose any desired rate through puncturing or r...

exchange rate and national income of countries trading with each other are among the most important factors affecting each country's trade. considering the political and economic ties between iran and venezuela in recent years, the goal of this paper was to investigate the effect of exchange rate volatility on exports of iran to venezuela. data used in this research include annual data for...

Road throughput can be increased by driving at small inter-vehicle time gaps. The amplification of velocity disturbances in upstream direction, however, poses limitations to the minimum feasible time gap. This effect is covered by the notion of string stability. String-stable behavior is thus considered an essential requirement for the design of automatic distance control systems, which are nee...

Molecular communication underpins nano-scale communications in nanotechnology. The combination of multi-nanomachines to form nano-networks is one the main enabling methods. Due importance source localization establishing nano-networks, this paper proposes a cooperative method for Communication via Diffusion (MCvD) systems using multiple spherical absorption receivers. Since there no exact mathe...

Early maladaptive schemata are patterns or profound themes which include memories, excitements, cognitions and physical emotions which are formed in childhood or adolescence, sustain in journey of life. This study aimed to investigate relationship between early maladaptive schemas and safe communications in students. 226 married students (113 women and 113 men) in 23-33 age range were selected ...

This paper describes the evaluation, test and selection of STANAG 4591, the future NATO Narrow Band Voice Coder (NBVC). STANAG 4591 will enable high performance interoperable secure speech communications in harsh acoustic and channel error environments at rates of 1.2kbps and 2.4kbps. The low data rate requirements of this voice coder allow it to operate on channels with low throughput, such as...

In this paper, machine learning (ML) algorithms are used for channel prediction in wireless communications. The performances of five ML compared terms the accuracy and symbol error rate (SER) different modulation schemes based on prediction. result shows that, prediction, support vector (SVM) has best performance stability. For signal detection, SVM linear regression (LR) have their own advanta...

This article investigates the relationship between the exchange rate and non-oil trade balance in Iran between 1981 and 2014. A structural vector auto-regression model is built. The results indicated that the increasing effect of the real effective exchange rate worsens the non-oil trade balance in the short term. In contrast, the increasing effect of the real effective exchange rate improves t...