List of Articles AMC

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  1 - Design business model with emphasis on social and environmental considerations
  hosein sormeh
  Abstract                The commitment of business owners to the design of the business model in a way that, in addition to providing its own benefits, improves the community's well-being and environmental sustainability, is at the forefront of customers' attention. The More

  Abstract                The commitment of business owners to the design of the business model in a way that, in addition to providing its own benefits, improves the community's well-being and environmental sustainability, is at the forefront of customers' attention. The purpose of this study was to design a business model with an emphasis on social and environmental considerations. The present research is a practical purpose and the research organization of this research is the largest educational nongovernmental educational institution in Iran, which is active in the field of teaching and publishing study books and conducting program tests and academic planning. For this purpose, and as a research sample, 1,300 of the customer groups, including students, students and funded scholars, blind and disabled students, as well as groups of school builders, university dormitories and library were selected and reviewed. . Given the proposed values, the business model was presented in the social and environmental responsibility layers, so that in the new business model, the three proposed values ​​in the field of social responsibility include social justice (educational), special services for particular classes and promotion Commonly accepted values ​​of the community and two proposed environmental values, including the promotion of environmental protection and the use of green technologies Manuscript profile
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  2 - Tracking Performance of Semi-Supervised Large Margin Classifiers in Automatic Modulation Classification
  Hamidreza Hosseinzadeh Farbod Razzazi Afrooz Haghbin
  10.7508/jist.2014.04.007
  Automatic modulation classification (AMC) in detected signals is an intermediate step between signal detection and demodulation, and is also an essential task for an intelligent receiver in various civil and military applications. In this paper, we propose a semi-superv More

  Automatic modulation classification (AMC) in detected signals is an intermediate step between signal detection and demodulation, and is also an essential task for an intelligent receiver in various civil and military applications. In this paper, we propose a semi-supervised Large margin AMC and evaluate it on tracking the received signal to noise ratio (SNR) changes to classify all forms of signals in a cognitive radio environment. To achieve this objective, two structures for self-training of large margin classifiers were developed in additive white Gaussian noise (AWGN) channels with priori unknown SNR. A suitable combination of the higher order statistics and instantaneous characteristics of digital modulation are selected as effective features. Simulation results show that adding unlabeled input samples to the training set, improve the tracking capacity of the presented system to robust against environmental SNR changes. Manuscript profile
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  3 - Reliable Transmission based on Imperfect Channel State Information by Optimum Combination of AMC and ARQ
  M. Taki R. Mahin Zaeem
  In this paper, a new scheme for completely reliable transmission of the information (with an error probability tends to zero) in a wireless communication link will be proposed in which to compensate the effects of fading and multipath, adaptive modulation and coding is More

  In this paper, a new scheme for completely reliable transmission of the information (with an error probability tends to zero) in a wireless communication link will be proposed in which to compensate the effects of fading and multipath, adaptive modulation and coding is used. Obviously, by the practical forward error correction it is impossible to achieve error free communication. Removing the residual error is by an auto-forwarding system. Of course, if error correction coding capability is weak, number of retransmissions will be increased to the much needed and it severely undermines the system throughput. On the other hands, strong error correction capability needs high block length codes and high transmission power which are limited in practice. In this paper, a method for optimum combination of error correction and auto forwarding is provided. In this paper, link adaptation is based on imperfect channel state information. Numerical results demonstrate efficiency of designed method. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Reliable Transmission based on Imperfect Channel State Information by Optimum Combination of AMC and ARQ
  M. Taki R. Mahin Zaeem
  In this paper, a new scheme for completely reliable transmission of the information (with an error probability tends to zero) in a wireless communication link will be proposed in which to compensate the effects of fading and multipath, adaptive modulation and coding is More

  In this paper, a new scheme for completely reliable transmission of the information (with an error probability tends to zero) in a wireless communication link will be proposed in which to compensate the effects of fading and multipath, adaptive modulation and coding is used. Obviously, by the practical forward error correction it is impossible to achieve error free communication. Removing the residual error is by an auto-forwarding system. Of course, if error correction coding capability is weak, number of retransmissions will be increased to the much needed and it severely undermines the system throughput. On the other hands, strong error correction capability needs high block length codes and high transmission power which are limited in practice. In this paper, a method for optimum combination of error correction and auto forwarding is provided. In this paper, link adaptation is based on imperfect channel state information. Numerical results demonstrate efficiency of designed method. Manuscript profile
• Open Access Article
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  5 - Broadband Printed Microstrip Antenna Loaded by Wideband AMC Structure for MIMO Systems
  حسین  ملک پور شهرکی Ali Abolmasoumi
  In this paper, a wideband printed antenna over an artificial magnetic conductor (AMC) surface is introduced which can be utilized for wireless applications such as WLAN, WiMAX, and multiple-input multiple-output (MIMO) systems. In the proposed structure, a planar AMC su More

  In this paper, a wideband printed antenna over an artificial magnetic conductor (AMC) surface is introduced which can be utilized for wireless applications such as WLAN, WiMAX, and multiple-input multiple-output (MIMO) systems. In the proposed structure, a planar AMC surface as the antenna ground plane is used to direct the radiation pattern of the antenna, and enhancing the impedance bandwidth. The proposed antenna design is composed of a pair of printed microstrip elements fed by an E-shape feed line for coupling the elements. The bandwidth of the designed antenna includes from 4.94 GHz to 6.9 GHz with a return loss of less than -10dBforlinear polarization in C-band. The rhombic-shape AMC unit cell indicates the bandwidth of 5.24-7.15 GHz for the ±90˚ reflection phase. By adding the AMC surface into the printed antenna, a wideband structure with acceptable miniaturization and gain enhancement to 7.25 dBi is achieved. The simulated results of the antenna’s impedance properties are performed by using full-wave simulators of HFSS and CST. Also, two-element array of the proposed design are investigated for different polarizations. Based on the obtained results, the operating bandwidth includes the frequency range from5.18GHz to 6.81 GHz and the isolation between the array elements is less than -22 dB. For this purpose, the antenna arrays can be applied for MIMO systems. Manuscript profile