Freeform feature shape reuse is an important issue in industrial design supporting. In this paper, the frequencybased operators for freeform feature shape reuse are discussed. Unlike the shape modeling approaches in the spatial domain that manipulate shapes by controlling the low-level geometric elements, the frequency-based operators work in the 2D frequency domain, and control the shape by ma...

The interference is the most important problem in LTE or LTE-Advanced networks. In this paper, the interference was investigated in terms of the downlink signal to interference and noise ratio (SINR). In order to compare the different frequency reuse methods that were developed to enhance the SINR, it would be helpful to have a generalized expression to study the performance of the different me...

Multiple access technologies based on Orthogonal Frequency Division Multiplexing (OFDM) yield evolutionary advantages for the next generation wireless communication systems. Wireless communication systems based on Orthogonal Frequency Division Multiple Access (OFDMA) increase channel capacity over broad bandwidth and improve the bandwidth efficiency. To maximally use resource in OFDMAbased wire...

Model transformations play a major role in model-driven engineering. For increasing development productivity as well as quality of model transformations, different kinds of reuse mechanisms have been proposed. However, it remains unclear to which extent reuse mechanisms have made their way into practical application. Thus, this paper presents an empirical study on the ATL Transformation Zoo to ...

In cellular communication systems, the same carrierfrequency is re-used at spatially separated base stations (BSs) to efficiently utilize the limited bandwidth. Therefore, the channel capacity is limited by the co-channel interference (CCI) from the neighboring co-channel BSs. To reduce the CCI, it is necessary to increase the frequency-reuse factor (the number of different channel groups). How...