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Coordinated multi-points (CoMP) transmission has been widely proved to be effective to combat inter-cell interference in 3GPP LTE-Advanced systems. However, implementation complexity of inter-site CoMP and relatively low capacity gain of intra-site CoMP motivate us propose a beam coordinated multipoints (Beam-CoMP) transmission scheme for 5G millimeter-wave cellular network. Considering the specific...
By employing sparse sampling, MIMO radars with matrix completion (MIMO-MC) achieve the performance of MIMO radars but with significantly fewer data samples. Further, due to the way the sparse sampling modulates the interference channel between radar and communication systems, MIMO-MC radars are good candidates for spectrum sharing. In this paper, we design a scenario in which a MIMO-MC radar optimally...
The emerging 5G cellular networks will operate at millimeter wave (mmWave) frequency bands to enhance the cell capacity. Massive MIMO antenna array and beamforming technology are used in order to overcome propagation limitations of mmWave band. Multi-beam based communication system is considered as the basic structure for 5G mobile network. However, to optimize the cell capacity, the question of how...
With an explosion of wireless mobile devices and services, beam-based communication in 5G heterogeneous network (HetNet) has attracted extensive attention recently due to some potential technologies in 5G such as massive MIMO and millimeter wave. This paper proposes an outage probability analysis framework for 5G beamforming HetNet, which is composed of a multi-layer cellular network including macrocells...
Due to the increasingly scarce spectrum resources and densely deployed wireless networks, how to increase the spectrum utilization efficiency becomes a hot topic. Channel reservation and cooperative transmission have shown great potential to improve the spatial reuse and network capacity. However, it is difficult to avoid the shortcomings that simply adopting either scheme. In this paper, we propose...
IEEE 802.11 wireless local area network (WLAN) has been increasingly developed over several decades. It requires four times throughput improvement in the next generation WLAN. Thus, researchers focus on the co-frequency co-time full duplex technology, which makes the devices transmit and receive packets simultaneously and theoretically doubles the throughput. Some existing works proposed several media...
The ever-increasing demands of wireless traffic call for continuously growing the wireless network capacity or throughput. Carrier sensing threshold adaptation and transmission rate adaptation, two efficient mechanisms improving the capacity of ad hoc network, have attracted much attention in recent years. However, simply adopting either mechanism can hardly meet the expectation that optimizing the...
Despite the growing deployment of 4G networks, the capacity of cellular networks is still insufficient to satisfy the ever-increasing bandwidth demand of mobile applications. Given the common interest of mobile users, Device-to-Device (D2D) communication has emerged as a promising solution to offload cellular traffic and enable proximity-based services. One of the main detriments for D2D communication...
We propose to generate the electromagnetic (EM) radiations by holographic metasurfaces, which can produce multi-beam scanning in one dimension (1D) and two dimensions (2D) controlled only by frequency. Respectively, we show that the main lobes of EM radiation beams accomplish 1D or 2D scans regularly with frequency by using the proposed holographic metasurfaces shaped with different interference patterns...
In this paper, we propose a mechanism to achieve multi-user (MU) MIMO downlink spatial diversity gain for both frequency flat and selective fading channel. The MU interference is first cancelled by precoding the signal with the null space (basis) of other users' propagation space and then the diversity gain is achieved by using the dominant eigen transmission (DET) method on the composite space of...
In modern power distribution utility, GIS and DMS address the same physical network and share a great amount of data. Nowadays, most of them still exist as separate systems and on different platforms. With the continuing growth of data and evolution of the systems, it requires to establish interfaces and workflows between GIS and DMS for exchanging necessary data with a lower maintenance cost and,...
Coordinated multiple point transmission (CoMP) technology becomes popular due to its potential for improving the performance of cell-edge UEs who undergo strong inter-cell interference (ICI). To fully exploit the potential CoMP gain, the appropriate method to converge cells into cluster is a prerequisite. However, the majority of existing research are based on theoretical hexagonal cell grid model...
We propose a method to design the holographic leaky-wave antenna composed of the artificial impedance surface, which can radiate the multi-beam with frequency scanning in one-dimension or in two-dimension space. Two samples corresponding to different characteristics of the frequency sweep are simulated to show the validity of our design.
For sake of lightness, thinness and low cost, single-layer projected-capacitive touch panel is popular for electronic products. The interference from liquid crystal display in single-layer touch screens is more serious than that in two-layer touch screens. For touch controller IC, differential measurement, which provides high common mode noise rejection, can be used in this case in order to suppress...
Physical-layer network coding (PNC) is a natural extension of network coding in wireless communication networks. PNC utilizes the addition characteristic of the electromagnetic wave rationally and improves the throughout in wireless networks significantly. This paper focuses on a key issue in PNC: the effect of pulse shaping on the performance of time synchronization errors. Analysis and simulation...
In this paper, we investigate the coexistence problem between the 802.22 and the 802.11af systems in the TV White Spaces (TVWS). We focus on the design of a co-channel coexistence scheme for the 802.22 customer-premises equipments (CPE) and the 802.11af systems. 802.22 and 802.11af are two typical standards envisioned to be widely adopted in the future. However, these two standards are heterogeneous...
The sparse signal recovery has been the subject of extensive research in several different communities. This paper analyzes the performance of orthogonal matching pursuit (OMP) algorithm in recovering magnitude decaying sparse signal in compressive sensing. A concept of Peak Signal Interference Ratio (PSIR) is defined which relates to the identification of atoms in OMP algorithm. Moreover, the relationship...
Auction is widely applied in wireless communication for spectrum allocation. Most of prior works have assumed that spectrums are identical. In reality, however, spectrums provided by different owners have distinctive characteristics in both spacial and frequency domains. Spectrum availability also varies in different geo-locations. Furthermore, frequency diversity may cause non-identical conflicts...
Dynamic spectrum auction (DSA) is a promising market mechanism to stimulate primary users (PUs) to lease their idle spectrum resources to improve their revenue. In this work, we focus on dynamic spectrum auction design which considers both space and time properties of spectrum. We propose a dynamic spectrum auction platform, where secondary users (SUs)enter a spectrum trading stochastically and spectrum...
Compared with the conventional AF-based single-relay cooperative networks, there is nearly double spectrum efficiency in the AF-based two-path relay cooperative networks. However, there are few channel estimation methods for that. In this paper, we propose this channel estimation scheme. Firstly, we find the necessary channel state information (CSI) based on the FIC (full interference cancelation)...
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