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The underwater vehicle-manipulator system (UVMS) is basically a redundant system. Hence, this redundant system can have various combinations of joint velocities that do not affect the given velocity profile of an end-effector and this may induce a self-motion of a vehicle. In the current paper, the performance index based on the concept of Zero Moment Point(ZMP) is proposed to enhance the stability...
Transmission power allocation scheme for soft frequency reuse (SFR) is proposed in tightly coordinated cells where neighboring cells are controlled by a central scheduler. Also fast adaptive SFR scheme is proposed. While SFR is the effective technique to increase cell edge user throughput, it costs the degradation of cell average throughput. The cost increases when SFR fails to be fast adaptive in...
System level performance of a broadcast/unicast superposition coding system is considered. Cellular network for unicast service only is considered as interference limited system, where increasing transmission power does not help improving network throughput. It is the case especially when frequency reuse factor is close to 1. In such case, the amount of power that does not contribute to improving...
In this paper, strategies for dynamic user grouping and shared frequency resource assignments for OFDMA systems are proposed. The users are grouped based on their modulation type and a metric for this purpose is introduced which considers tradeoffs between maximum rate and minimum allocated resources per user. The available resources are distributed through the modulation groups based on fairness...
The problem of optimal power allocation for a single user in an OFDMA system is considered for uplink, under the assumption that the total power is divided equally to a selected subset of subcarriers. This scenario suggests reduced feedback information for power control from base station to the user since only the information over modulation on each subcarrier is necessary. Assuming knowledge of the...
This paper describes how the conversion of a device and a control message is accomplished in a UMB. The UMB solves interoperability problems caused by the heterogeneity of several types of home network middleware. To solve the problems, conversion of a device and messages among the middleware is indispensable. Devices can see and control other devices connected to different middlewares in the UMB...
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