Performance of Cooperative ofdm
Performance Analysis of OFDM Systems using Cooperative Diversity Techniques Abstrac t: Cooperative Diversity has been widely used in wireless network, and Orthogonal frequency division multiplexing (OFDM) is a key technique of multi-carrier transmission to meet high data rate requirement of wireless communication. The aim of this project is to combine the technology of OFDM with cooperative diversity techniques. The simulation will be done in MATLAB. The performance of the system will be compared by employing various techniques at the cooperative node. As of now, an application program has been designed about Cooperative Diversity in the OFDM system by combining the technology of orthogonal frequency division multiplexing (OFDM) with cooperative diversity techniques. Simulation results should show ,which system achieves a better error rate performance and at the same time obtain a significant diversity gain on the commonly used multi-path fading channel. In this project Amplify and Forward ,Decode and Forward and Coded Cooperation diversity techniques will be explored , to obtain better performance for OFDM systems.
I. Introduction: Multiple antennas transmitting diversity techniques have been investigated based on their ability to combat fading induced by multi-path of the channel, and have been widely used in wireless communication system. However, the deployment of antenna array on mobile terminal is difficult due to the size and power limitation. In order to solve this problem, a new mode of gaining transmit diversity called Cooperative Diversity has been proposed and widely studied. The idea of Cooperative Diversity is: in multi-user communication environment, some single-antenna users sharing other users’ antennas form a virtual antenna array to transmit each other 's data to the receiver based on some protocol. Orthogonal Frequency Division Multiplexing (OFDM), as one of the most promising technology of future broadband wireless
I. Introduction: Multiple antennas transmitting diversity techniques have been investigated based on their ability to combat fading induced by multi-path of the channel, and have been widely used in wireless communication system. However, the deployment of antenna array on mobile terminal is difficult due to the size and power limitation. In order to solve this problem, a new mode of gaining transmit diversity called Cooperative Diversity has been proposed and widely studied. The idea of Cooperative Diversity is: in multi-user communication environment, some single-antenna users sharing other users’ antennas form a virtual antenna array to transmit each other 's data to the receiver based on some protocol. Orthogonal Frequency Division Multiplexing (OFDM), as one of the most promising technology of future broadband wireless
References: 1. Cooperative Communications and Networking: K.J.Ray Liu, Ahmed K Sadek, Weifung Su, Andre Kwasinski 2.Coded Cooperative Communications :Kamal Khatir 3. Diversity through Coded Cooperation Todd E. Hunter, Member, IEEE and Aria Nosratinia, Senior Member, IEEE 4. OFDM for Wireless Communications Systems by Ramjee Prasad 5. OFDM Communications with Cooperative Relays H. Lu1, H. Nikookar1 and T. Xu2 1.International Research Centre for Telecommunications and Radar (IRCTR) 2.Circuits and Systems Group (CAS) Dept.EEMCS, Delft University of Technology Mekelweg 4, 2628 CD, Delft, The Netherlands