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An Estimation of achievable Rate for Digital Transmissions over MIMO Channels

Communications and Network 2015年第2期7卷 117-124页

作者： Jinbao Zhang Song Chen Qing He School of Electronic and Information Engineering Beijing Jiaotong University Beijing China Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation Beijing China

achievable rate (AR) is significant to communications. As to multi-input multi-output (MIMO) digital transmissions with finite alphabets inputs, which greatly improve the performance of communications, it seems rather difficult to calculate accurate AR. Here we propose an estimation of con-siderable accuracy and low complexity, based on Euclidean measure matrix for given channel states and constellations. The main contribution is explicit expression, non-constraints to MIMO schemes and channel states and constellations, and controllable estimating gap. Numerical results show that the proposition is able to achieve enough accurate AR computation. In addition the estimating gap given by theoretical deduction is well agreed.

关键词： achievable Rate Digital MIMO Transmissions Analytical Estimation Low-Complexity

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Interference Cancellation in Device-to-Device Communications underlying MU-MIMO Cellular Networks

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China Communications 2019年第4期16卷 75-88页

作者： Yiyang Ni Yuxi Wang Hongbo Zhu Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Jiangsu Second Normal University

This paper investigates the device-to-device(D2 D) communication underlaying multi-user multi-input multi-output(MU-MIMO) cellular networks. It is assumed that D2 D users reuse the downlink time-frequency resources of cellular links, and the base station(BS) is assumed to be equipped with multiple antennas. We investigate the ergodic achievable sum rate of the system when the interference cancellation(IC) precoding strategy is employed at the BS. The distributions of the received signal-to-interference-plus-noise ratio(SINR) for each link are firstly analyzed, and an exact ergodic achievable sum rate of the whole system with closedform expressions is then derived. Furthermore, we present novel upper and lower bounds with simpler expressions, which are later verified to be fairly close to the Monte-Carlo simulations. All the expressions we presented are suitable for arbitrary network topology and arbitrary number of antennas at BS. Based on the derived bounds, the influence of the antennas at BS on system performance is then analyzed. We reveal that the system performance increases along with the number of antennas at BS in a logarithmic way. The accuracy of our analytical results is validated via comparisons with Monte-Carlo simulations.

关键词： interference cancellation D2D communication ergodic achievable sum rate MU-MIMO

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Modeling and Simulation Study of Space Data Link Protocol

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International Journal of Communications, Network and System Sciences 2014年第10期7卷 440-452页

作者： Ismail Hababeh Rizik M. H. Al-Sayyed Ja’far Alqatawna Yousef Majdalawi Marwan Nabelsi Faculty of Computer Engineering and Information Technology German Jordanian University Amman Jordan King Abdullah II School for Information Technology The University of Jordan Amman Jordan Digital Signal Processing & Information Technology Bremen Germany

This research paper describes the design and implementation of the Consultative Committee for Space Data Systems (CCSDS) standards REF _Ref401069962 \r \h \* MERGEFORMAT [1] for Space Data Link Layer Protocol (SDLP). The primer focus is the telecommand (TC) part of the standard. The implementation of the standard was in the form of DLL functions using C++ programming language. The second objective of this paper was to use the DLL functions with OMNeT++ simulating environment to create a simulator in order to analyze the mean end-to-end Packet Delay, maximum achievable application layer throughput for a given fixed link capacity and normalized protocol overhead, defined as the total number of bytes transmitted on the link in a given period of time (e.g. per second) divided by the number of bytes of application data received at the application layer model data sink. In addition, the DLL was also integrated with Ground Support Equipment Operating System (GSEOS), a software system for space instruments and small spacecrafts especially suited for low budget missions. The SDLP is designed for rapid test system design and high flexibility for changing telemetry and command requirements. GSEOS can be seamlessly moved from EM/FM development (bench testing) to flight operations. It features the Python programming language as a configuration/scripting tool and can easily be extended to accommodate custom hardware interfaces. This paper also shows the results of the simulations and its analysis.

关键词： Consultative Committee for Space Data Systems Standards Space Data Link Protocol Mean End-to-End Packet Delay Maximum achievable Application Layer Throughput Normalized Protocol Overhead Telecommand Spacecrafts Space Instruments

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A Safety Relay Selection Method Based on Network Coding

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International Journal of Communications, Network and System Sciences 2017年第8期10卷 167-175页

作者： Qiang Guo Xin Li College of Information and Communication Engineering Harbin Engineer University Harbin China

A method of cooperative relay selection based on network coding security is proposed for relay selection problem of cooperative communication system security in networked multi-relay scenarios, which is different from the existing relay node selection method. The algorithm not only merged with timestamp and homomorphic signature to construct the node degree of safety to find reliable relay, at the same time to considers the received signal to noise ratio at all relay nodes value and the channel gain to the source node. The simulation results show that the proposed method can improve the achievable rate of the destination node and reduce the outage probability on the basis of guaranteeing the safety of the relay node.

关键词： Timestamp Homomorphic Signature Node Degree of Safety achievable Rate Outage Probability

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