#Transmit definition how to
#Transmit definition plus

Only the solution of the minimum spanning tree by constructing the spatial-temporal network topology to improve energy efficiency was obtained for the CFSN in. To the best of our knowledge, there are few research reports on the optimal power allocation in CFSN.

#Transmit definition plus

In, based on the received signal interference plus noise ratio, Markov chain was adopted to obtain the dynamic power control method with the minimum packet error rate (PER). For the symbol programming problem of target detection in distributed radar sensor network, the closed-form expression of optimal power allocation by establishing the optimal linear unbiased estimation model was obtained in. For the cooperative network of spectrum sharing, by solving the convex optimization problem, the optimal power allocation strategy with minimum energy consumption under the requirements of QoS was obtained in. Aiming at the problem that it is difficult to obtain an analytic solution for the optimal power allocation in amplification and forwarding (AF) relay selection of cooperative communication system, artificial neural network was adopted to obtain an efficient solution from the target of minimum bit error rate in. For example, in an end-to-end MIMO multihops wireless network with outage probability limited, the power allocation method was studied and the analytic solution of optimal power allocation with the minimum total transmit power of the system was obtained in. ДЇor wireless communication systems, including wireless sensor networks and radar networks, research on optimizing systematic performance by allocating nodal power efficiently has always been a hotspot.

#Transmit definition how to

Therefore, how to allocate nodal transmit power efficiently and optimize the performance of the cluster flight spacecraft is an important issue needs to be solved. In addition, like other distributed space systems, the cluster flight spacecraft is a resource-sharing and energy-limited system. These spacecraft constitute a virtual satellite platform with information exchange structure. Cluster flight spacecraft require mutual cooperation between nodes to realize information exchange, navigation communication, and power sharing. Each module can be regarded as a node through wireless communication, and the nodes construct the cluster flight spacecraft network (CFSN). Fractionated spacecraft distributes the functionality of a traditional large monolithic spacecraft into a number of heterogeneous modules. The previous work has made a contribution to earth observation and space exploration. In recent years, fractionated spacecraft with cluster flight model has become a hot topic in the field of distributed space network, due to its advantages of flexibility, rapid response, low cost, strong scalability, and long lifetime. Finally, the results show that the pocket error rate increases with the provided traffic load, but the pocket error rate hardly changes with the same traffic load in different sequential time slots of any orbital hyperperiod or in the same time slot of different orbital hyperperiods, and by maximizing the sum of the nondiagonal elements in the probabilistic adjacency matrix, the pocket error rate minimum is achieved for a given total network transmit power at any time slot for cluster flight spacecraft network. Yet importantly, the influence of node transmit power on the QoS performance of cluster flight spacecraft network was simulated and analyzed under the assumption of finite overall network transmit power and low traffic load. Due to discreteness of nodal distance distribution, Monte Carlo method was applied to solve the transmit power allocation problem. And the problem of minimizing the packet error rate of the cluster flight spacecraft network system can be converted into maximizing the expectation of the binary probabilistic adjacency matrix, i.e., maximizing the sum of the nondiagonal elements in the probabilistic adjacency matrix. Then, the optimization-theoretic model described the optimized transmit power allocation strategy and its implementation algorithm was proposed. First, the node mobility, nodal distance distribution, and probabilistic adjacency matrix were formulated for cluster flight spacecraft network based on twin-satellite mode. In this paper, we investigate the transmit power allocation problem to minimize the average packet error rate at the access point in the cluster flight spacecraft network, which adopts the CSMA/CA channel access mechanism.