Shuo Chen

• Beijing University of Posts and Telecommunications

In underlay cognitive heterogeneous cellular network (CHCN), small cells can transmit their signals as long as the interference to macro cell is below a threshold. Consider a two-layer CHCN with polarized MIMO small cells, a novel polarization-space based interference alignment scheme is proposed. The cross-tier interference between macro cell and...

Ultra-dense deployment of small cell networks is widely regarded as a key role to meet the increasing demand for huge capacity of wireless communication systems. Meanwhile, network densification will result in severe inter-cell interference and thus impair system performance. Traditional radio resource management schemes pay attention to interferen...

Polarization is an important property of electromagnetic waves. It has shown the great application potential in optical fiber, radar, and satellite communications, where polarization has been exploited to be a promising means of enhancing channel capacity. The existing research has shown that, in theory, it has great potential to sixfold the channe...

In this paper, we consider the problem of spectrum sensing in cognitive radios by exploiting Stokes subvector, which can completely describe energy and polarization information of the received vector signal captured by dual-polarized antennas. We first find that both component correlation between Stokes variables (i.e., the elements of Stokes subve...

Spectrum sensing exploiting polarization has been identified as an effective method for improving detection performance. However, the optimal polarization-based sensing algorithm with an upper bound performance has not yet been developed. The polarization likelihood ratio test (PLRT) is derived using the Neyman-Pearson (NP) theorem, resulting in an...