State University of Aerospace Instrumentation

Displaying 1-10 of 10 results

  • White Papers // Jan 2013

    Rate-Distortion Control in Wavelet-Based Video Compression Systems With Memory Restriction

    Video transmission systems over wired/wireless channels are widely used in many spheres of the everyday life. However, such systems still have high memory and computational requirements. This paper presents algorithm for wavelet-based video compression in video transmission systems with the constraint memory budget that is insufficient to store a single...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    System and Model for Real-Time Wireless Video Transmission

    In this paper, the problem of real time transmission of compressed video over a variable UWB channel is investigated. The main goal is to create joint compression and transmission scheme (jpeg progressive + ARQ protocol) that will provide the required level of PSNR and probability of lost rows in reconstructed...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Capacity Estimation of Centralized Reservation-Based Random Multiple-Access System

    Modification of the basic random multiple-access model for the case of a centralized reservation-based data network is considered. Substance of the modification is the following. The channel time is composed of equal intervals, which are called frames. Each frame consists of some consequent mini-slots for the transmission of requests, used...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Performance Analysis of a High-Speed Ultra-Wideband WPAN MAC

    This paper addresses the problem of the throughput-delay performance of a contemporary WPAN MAC standard. A brief overview of the standard functionality is first presented that allows a system model derivation. Two different acknowledgement policies are described under which the channel operation is considered. Two possible input traffic models are...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Binary Exponential Backoff Algorithm Analysis in the Lossy System With Frames

    In this paper, the authors consider a random multiple-access system under the control of the Binary Exponential Backoff (BEB) algorithm. They account for the time frame structure, as well as for the possibility of a data loss. An alternative approach to calculating the BEB algorithm saturation rate is demonstrated and...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Joint Source Coding and Modulation for Low-Complexity Video Transmission

    In this paper, the authors propose a Statistical QAM algorithm for video over wireless transmission - a joint approach for source coding and modulation utilizing two following ideas. Firstly context prediction is used to make distribution of image pixels values closer to bilateral geometrical distribution. Then the resultant values are...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    The Choice of the Optimal Segment Size for the Relay With Limited Buffer Resources

    Wireless communication and mobile communication technologies have witnessed a fast development in recent years. Among all the other technologies in communication industry, mobile communication, for its wide deployment and easy access nature, has shaped the people world in a profound manner. Today, more than one billion people worldwide are mobile...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Symmetric User Grouping for Multicast and Broadcast Polling in IEEE 802.16 Networks

    IEEE 802.16 standard provides a high-speed channel access to various multimedia services. It specifies both PHYsical (PHY) and Media Access Control (MAC) layers with a special emphasis on the concept of quality of service (QoS). In this paper, the authors address the bandwidth reservation in IEEE 802.16 standard via multicast...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jun 2012

    Random Multiple Access in Q-Ary Disjunctive Channel

    Random Multiple Access (RMA) is preferred channel access method for the low intensity traffic where multiple packets rarely queue up at one transmitter. For such type of traffic RMA algorithms ensure low mean packet delay even for the considerably high user population. Mean packet delay provided by RMA algorithms rises...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jun 2008

    Tree Algorithms With Free Access and Interference Cancellation in Presence of Cancellation Errors

    In this paper, the authors address a promising cross-layer MAC-PHY technique that combines both Tree Algorithm (TA) for collision resolution and successive interference cancellation (SIC) scheme to recover the signals of collided users. The resulting SICTA protocol family is known to achieve higher throughputs in comparison to the conventional MAC...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jun 2008

    Tree Algorithms With Free Access and Interference Cancellation in Presence of Cancellation Errors

    In this paper, the authors address a promising cross-layer MAC-PHY technique that combines both Tree Algorithm (TA) for collision resolution and successive interference cancellation (SIC) scheme to recover the signals of collided users. The resulting SICTA protocol family is known to achieve higher throughputs in comparison to the conventional MAC...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Rate-Distortion Control in Wavelet-Based Video Compression Systems With Memory Restriction

    Video transmission systems over wired/wireless channels are widely used in many spheres of the everyday life. However, such systems still have high memory and computational requirements. This paper presents algorithm for wavelet-based video compression in video transmission systems with the constraint memory budget that is insufficient to store a single...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    System and Model for Real-Time Wireless Video Transmission

    In this paper, the problem of real time transmission of compressed video over a variable UWB channel is investigated. The main goal is to create joint compression and transmission scheme (jpeg progressive + ARQ protocol) that will provide the required level of PSNR and probability of lost rows in reconstructed...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Capacity Estimation of Centralized Reservation-Based Random Multiple-Access System

    Modification of the basic random multiple-access model for the case of a centralized reservation-based data network is considered. Substance of the modification is the following. The channel time is composed of equal intervals, which are called frames. Each frame consists of some consequent mini-slots for the transmission of requests, used...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Performance Analysis of a High-Speed Ultra-Wideband WPAN MAC

    This paper addresses the problem of the throughput-delay performance of a contemporary WPAN MAC standard. A brief overview of the standard functionality is first presented that allows a system model derivation. Two different acknowledgement policies are described under which the channel operation is considered. Two possible input traffic models are...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jun 2012

    Random Multiple Access in Q-Ary Disjunctive Channel

    Random Multiple Access (RMA) is preferred channel access method for the low intensity traffic where multiple packets rarely queue up at one transmitter. For such type of traffic RMA algorithms ensure low mean packet delay even for the considerably high user population. Mean packet delay provided by RMA algorithms rises...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Binary Exponential Backoff Algorithm Analysis in the Lossy System With Frames

    In this paper, the authors consider a random multiple-access system under the control of the Binary Exponential Backoff (BEB) algorithm. They account for the time frame structure, as well as for the possibility of a data loss. An alternative approach to calculating the BEB algorithm saturation rate is demonstrated and...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Joint Source Coding and Modulation for Low-Complexity Video Transmission

    In this paper, the authors propose a Statistical QAM algorithm for video over wireless transmission - a joint approach for source coding and modulation utilizing two following ideas. Firstly context prediction is used to make distribution of image pixels values closer to bilateral geometrical distribution. Then the resultant values are...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    The Choice of the Optimal Segment Size for the Relay With Limited Buffer Resources

    Wireless communication and mobile communication technologies have witnessed a fast development in recent years. Among all the other technologies in communication industry, mobile communication, for its wide deployment and easy access nature, has shaped the people world in a profound manner. Today, more than one billion people worldwide are mobile...

    Provided By State University of Aerospace Instrumentation

  • White Papers // Jan 2013

    Symmetric User Grouping for Multicast and Broadcast Polling in IEEE 802.16 Networks

    IEEE 802.16 standard provides a high-speed channel access to various multimedia services. It specifies both PHYsical (PHY) and Media Access Control (MAC) layers with a special emphasis on the concept of quality of service (QoS). In this paper, the authors address the bandwidth reservation in IEEE 802.16 standard via multicast...

    Provided By State University of Aerospace Instrumentation