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New transmit mutual coding for multiple input multiple output (MIMO) broadcasting is proposed. The proposed coding is based on wireless transmission over symbol multicasting to independent and uncoordinated terminals in the downlink. The motivation of proposing symbol-multicast is the fact that in digital communication the transmission is based on a finite alphabet set of symbols. Therefore, it would...
Transmission using cooperative relays is a new paradigm in wireless communication. The cooperating relays facilitate the process of communication by performing the operations like data transmission and data processing in a distributed manner. In this wireless system every node is an active element and can act as a relay node. So when a group of these cooperating nodes are involved in a communication...
Cooperative relaying is a relatively new technique in wireless communication systems that make use of all the nodes present in a wireless sensor network by dynamically sharing their radio resources in a distributed manner. All the nodes present in the periphery of the two communicating nodes will act as relays and forward the information until it reaches the recipient node. By doing this, it achieves...
This paper focuses on a cognitive-shared system that employs generalized selection combining in Rayleigh block fading. The closed-form expressions of the ergodic capacity and the symbol error probability of a cognitive-shared channel are proposed. The results show that the channel from the secondary transmitter to the primary receiver is of prominence on the performance of the secondary user.
Cooperative transmission is one of the promising techniques in wireless communication systems that enables the cooperating node in a wireless sensor network to share their radio resources by employing a distributed transmission and processing operation. This technique offers significant diversity gains as several cooperating nodes forward source node's data to the destination node over independently...
In this paper, we apply the power control concept to optical CDMA star networks. Two approaches are considered, namely, centralized and distributed power control. Both approaches are used to optimize the optical transmit power and to maximize network capacity in terms of the number of users satisfying a target signal to interference (SIR) ratio. Centralized algorithms result in the optimum power vector...
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