22-09-2017, 10:42 AM
Given energy delay and data rate constraints, a source node dynamically selects its cooperating nodes from its neighbors to form a virtual MIMO system with the destination node (assumed to have multiple antennas), as well as adaptively assigns the power level and adjust the constellation size for each of the selected cooperative nodes. In order to optimize the performance of the system, we consider together the optimization of all these parameters, given the aforementioned system limitations.
Modern wireless communications technology has increased spectral efficiency can be achieved by using multiple input multiple output (MIMO) systems. Recently, MIMO has attracted extensive attention and several techniques have been proposed for cellular systems and ad hoc networks to achieve improved system performance. However, in ad hoc / sensor wireless networks, direct use of MIMO at each node may not be feasible, since MIMO may require complex signal processing and transceiver modules, resulting in high power consumption. In addition, nodes in ad hoc wireless networks / sensor networks are often powered by batteries with limited power. Wireless networks, such as ad hoc networks and sensors, are composed of a set of nodes that share a common wireless medium. Such networks have been attracting intense attention to their enormous potential in application. However, there are still many problems open today, making it difficult to effectively design high quality wireless networks.
Modern wireless communications technology has increased spectral efficiency can be achieved by using multiple input multiple output (MIMO) systems. Recently, MIMO has attracted extensive attention and several techniques have been proposed for cellular systems and ad hoc networks to achieve improved system performance. However, in ad hoc / sensor wireless networks, direct use of MIMO at each node may not be feasible, since MIMO may require complex signal processing and transceiver modules, resulting in high power consumption. In addition, nodes in ad hoc wireless networks / sensor networks are often powered by batteries with limited power. Wireless networks, such as ad hoc networks and sensors, are composed of a set of nodes that share a common wireless medium. Such networks have been attracting intense attention to their enormous potential in application. However, there are still many problems open today, making it difficult to effectively design high quality wireless networks.