Abstract
The clustering network is a solution to improve data-rate transmission in small-cells. In this case, clustering small-cells (CSCs) adopt a multiple antennas concept. The multiple antennas are used to maximize the downlink data-rate transmission at the users, but it requires precoding techniques to minimize interference among CSC users. This paper proposes a block diagonalization (BD) as a precoding technique for minimizing interference among CSC users. The performance of the BD precoding implemented on the clustering network under various numbers of small-cells. The CSC also implements a water-filling power allocation (PA-CoopWF) to distribute the available transmission power along with the CSCs antennas. To show the performance, our paper simulates two types of precoding techniques; those are the proposed BD and minimum mean square error (MMSE) in CSCs. Based on the receiver user parts under the overlapping coordination of CSCs, our method based on the BD precoding achieves considerably higher data-rate transmission compared to the MMSE precoding, especially on larger clusters. The simulation also shows that by implementing CSC with the BD in short-range distances and higher numbers of antennas, it promotes better data-rate performances compared to the MMSE precoding by 2.75 times at distance 100m and 67% at 50 antennas.
Highlights
The implementation of small-cells is one of the effective solutions to improve data-rate in cellular networks [1]
The clustering small-cells (CSCs) with =4, 6, and 8 antennas, Block diagonalization precoding and power allocation for clustering... (Toha Ardi Nugraha) our proposed scheme improves sum-rate about 10%, 21%, and 40% compared to minimum mean square error (MMSE) with the same number of antennas, respectively
The graph informs that the average data-rate improves gradually with the increase of the number of antennas and the performance gap of the proposed precoding technique becomes larger in comparison to the MMSE methods
Summary
The implementation of small-cells is one of the effective solutions to improve data-rate in cellular networks [1]. Small-cells are a solution to extend cellular coverage. In [2], the authors propose an architecture of small-cells based resource allocation for wireless backhaul in two-tier heterogeneous networks. The authors only focus on the backhaul transmission on the clustered small-cells. The architecture of small-cells enables easy implementation of a clustering network. The main concept of clustering networks is that some cells in a network coordinates each other [7]. This method manages coordination information for improving the performance of communication [8]. The coordination method is one of the key Journal homepage: http://beei.org
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