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In this paper, we have summarized our analysis about distributed antennas based CoMP in LTE-Advanced and evaluated the system spectrum efficiency in three scenarios. From the results, we can see the proposed scheme achieves a higher throughput compared with centralized antennas based system. The location of antennas closed to sector center leads to the(More)
In this paper, we proposed a heuristic algorithm to investigate the performance of resource allocation combined with coordinated multipoint(CoMP) in multi-cell OFDMA systems. We first develop an analytical model of resource allocation for an arbitrary number of users in the different cells, and formulate it into an optimization problem that is proved to be(More)
The problem of finding matches of a regular expression (RE) on a string exists in many applications such as text editing, biosequence search, and shell commands. Existing techniques first identify candidates using substrings in the RE, then verify each of them using an automaton. These techniques become inefficient when there are many candidate occurrences(More)
Spectrum sharing in OFDM-based Cognitive Radio Networks (CRN) is investigated by using graph theory. We consider the networks in which a set of secondary links (SLs) make underlay access to support single-hop ad hoc transmission. Spectrum sharing must be carried out in SLs so that no excessive interference is caused to links of the primary network and(More)
The problem of finding matches of a regular expression (RE) on a string exists in many applications, such as text editing, biosequence search, and shell commands. Existing techniques first identify candidates using substrings in the RE, then verify each of them using an automaton. These techniques become inefficient when there are many candidate occurrences(More)
The power efficient mechanism for MTC (Machine type communication) UEs in LTE-A networks is investigated in this paper. Extending paging cycle has been verified as one efficient method to reduce the power consumption for MTC UE. However, unnecessary SI( System Information) acquisition will be introduced if the extended paging cycle is larger than MP(More)
The existing disparity map based virtual view rendering may decrease the sharpness of the rendered image, or result in ghosts. In this paper, a new disparity map based virtual view rendering method is proposed. The left and the right view images and their corresponding disparity maps are used to render intermediate virtual view image respectively. Then the(More)