GROUP MEMBERS: SUPERVISIOR NC SARA VIQAR ASST PROF ZAKA UL MUSTAFA NC HINA RUBAB Military College of Signals NC SARA MASOOD National University of Sciences PC SADIA ZULFIQAR and Technology Pakistan PROJECT TITLE Real Time Emulation of Cooperative Communication System in Wireless Environment INTRODUCTION-BACKGROUND Cooperative Communication has recently received significant interest as an untapped means for improving performance of relay transmission systems operating over the ever-challenging wireless medium. The common theme of most research in this area is to optimize physical layer performance measures without considering in much detail how cooperation interacts with higher layers and improve network performance measures. These issues are important for enabling cooperative communication to practice in real-world networks, especially for mobile adhoc networks. The use of multiple relays produces multipath fading phenomenon at the receiver and hence diversity can be used to achieve high output gains. Thus in mobile environment, routing problem is solved at the physical layer and effects of delay are reduced. The goal of this project is to analyze basic cooperative communication systems and their comparison with SISO (Single Input Single Output) Systems. Cooperation in communication networks results when terminals use their power, time, and bandwidth resources to mutually enhance their transmissions. The effect of cooperation is twofold: it achieves rate gains via shorter hops to cooperating neighbors or relays and it increases the spatial diversity available at the destination. Cooperation also achieves SNR gains that are functions of the inter- node distances in this range. This means that certain sets of cooperating nodes can achieve the same diversity at a lower SNR than others. PROJECT APPLICATION This communication technique has not yet been implemented in any practical radio networks anywhere in the world. The project finds its application in wireless sensor networks, MANETS, and military Combat Networks for battle field communications. The radio networks established in battle fields or during disaster relief operations are temporary and mobile antennas have short ranges. When a mobile gets out of the range of the receiver, then it cannot transmit signals to the receiver. Here is the point where the cooperative communication will come into play, the outbound mobile station will collaborate with a nearby mobile station to reach the receiving antenna. Thus the communication can be carried out in more effective manner. Fig1: A mobile receiver in combat network is receiving signals from mobile stations within its range Fig2: The outbound mobile station cooperates with an inbound mobile station to transmit signals to the receiver Fig3: Military network established in battle field PROJECT GOALS The implementation of this project will be done using three standard PCs with one DSP processor (DSP board C6713) each. A basic three node relay network will be created with one DSP board serving as a transmitter second as relay and third as a receiver. All of the processing will be done in the DSP kit except the processing of output results and loading of required files which are done by computer processor. In depth analysis of the results will be done on the basis of BER, SNR and transmission power of the network. Our project will include three steps: MATLAB Simulations of different cooperative communication techniques like Amplify- and-Forward and Detect-and-Forward and their performance Comparison Real-Time Implementation on DSP kits using Wired Links Real-Time Emulation of Wireless Environment using standard PCs on LAN and DSP kits EXTENDED GOALS If Microwave Front-End becomes available then Real-Time emulation of Wireless environment can be achieved via true radio communication antennas instead of using the LAN PCs.
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