Cooperative Strategies for Imperfect Csi Scenarios Based on Distributed
نویسندگان
چکیده
Cooperative communications are gaining much interest in modern communications because they allow to improve the information transmission between a source and a destination using various intermediate terminals. This project is a complete study of cooperative systems, analyzing its performance and comparing the use of a single terminal with the use of the Alamouti code, which uses two terminals. First, there is an introduction to cooperative systems and to information theory. Then we have studied a cooperative system using the information theory, in terms of outage probability, and subsequently we have adapted it to a real cooperative system using a QPSK modulation, studying its packet error probability. Finally several protocols are proposed to improve the performance of the studied cooperative system.
منابع مشابه
Sum-Rate Maximization Based on Power Constraints for Cooperative AF Relay Networks
In this paper, our objective is maximizing total sum-rate subject to power constraints on total relay transmit power or individual relay powers, for amplify-and-forward single-antenna relay-based wireless communication networks. We derive a closed-form solution for the total power constraint optimization problem and show that the individual relay power constraints optimization problem is a quad...
متن کاملOn the Performance Analysis of Cooperative Vehicular Communication
Vehicular networking is envisioned to be a key technology area for significant growth in the coming years. Although the expectations for this emerging technology are set very high, many practical aspects remain still unsolved for a vast deployment of vehicular networks. This dissertation addresses the enabling physical layer techniques to meet the challenges in vehicular networks operating in m...
متن کاملPerformance Analysis of cooperative SWIPT System: Intelligent Reflecting Surface versus Decode-and-Forward
In this paper, we explore the impacts of utilizing intelligent reflecting surfaces (IRS) in a power-splitting based simultaneous wireless information and power transfer (PS-SWIPT) system and compare its performance with the traditional decode and forward relaying system. To analyze a more practical system, it is also assumed that the receiving nodes are subject to decoding cost, and they are on...
متن کاملErgodic mutual information of OFDMA-based Selection-Decode-and-Forward cooperative relay networks with imperfect CSI
This paper presents a novel approach to investigate ergodic mutual information of OFDMA Selection-Decode-and-Forward (SDF) cooperative relay networks with imperfect channel state information (CSI). Relay stations are either dedicated or non-dedicated (i.e., subscriber stations assisting other subscriber stations). The CSI imperfection is modeled as an additive random variable with known statist...
متن کاملEgoistic vs. altruistic beamforming in multi-cell systems with feedback and back-haul delays
Base station cooperation is an attractive technique to increase the spectral efficiency of multi-cell systems. One of the challenges in multi-cell systems is obtaining accurate channel state information (CSI) at the base station. One source of CSI inaccuracy is the delay incurred in obtaining CSI and exchanging it among base stations. The presence of delay is inevitable when CSI is exchanged ov...
متن کامل