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The dynamic adjustment of TDD UL-DL configuration based on the instantaneous traffic conditions can be an effective way to optimize the system performance. Small cells in LTE heterogeneous network are considered to be one of the candidates for the dynamic adjustment. In this paper, we focus on UL-DL reconfiguration algorithms to conduct the dynamic adjustment, where the QoS requirement differences...
Device-to-Device (D2D) communication is considered to be a promising resource reuse technology for local users. Unlike the previous studies on centralized scheduling methods, we develop several distributed resource management schemes for D2D communication underlay cellular networks. In the distributed resource management framework, each D2D user independently decides the transmit resources and power...
Conventional channel estimation algorithms devised for OFDM systems suffer from significant performance degradation in the presence of interference. This paper develops a robust least square (LS) channel estimation scheme with low complexity. The received pilot symbols are first separated into several groups, then each group is divided into two parts. After that, we apply the conventional LS algorithm...
At first we introduce Hu moment invariant. According to its higher computational complexity and higher time consuming, we introduce an improved Hu moment as we called boundary moment. This paper proves boundary moment invariants computed using the shape boundary only, which tremendously reduce computations compared to traditional Hu moment. Then we do experiments to recognize shape using boundary...
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