Achievable Rate of Rician Large-Scale MIMO Channels with Transceiver Hardware Impairments

Transceiver hardware impairments (e.g., phase noise, in-phase/quadrature-phase (I/Q) imbalance, amplifier non-linearities, and quantization errors) have obvious degradation effects on the performance of wireless communications. While prior works have improved our knowledge on the influence of hardware impairments of single-user multiple-input multiple-output (MIMO) systems over Rayleigh fading channels, an analysis encompassing the Rician fading channel is not yet available. In this paper, we pursue a detailed analysis of regular and large-scale (LS) MIMO systems over Rician fading channels by deriving new, closed-form expressions for the achievable rate to provide several important insights for practical system design. More specifically, for regular MIMO systems with hardware impairments, there is always a finite achievable rate ceiling, which is irrespective of the transmit power and fading conditions. For LS-MIMO systems, it is interesting to find that the achievable rate loss depends on the Rician $K$-factor, which reveals that the favorable propagation in LS-MIMO systems can remove the influence of hardware impairments. However, we show that the non-ideal LS-MIMO system can still achieve high spectral efficiency due to its huge degrees of freedom.Comment: 7 pages, 1 table, 3 figures, accepted to appear in IEEE Transactions on Vehicular Technolog

Imaging the Pacific Plate and transition zone beneath eastern Asia with receiver functions

In this thesis, I applied receiver function techniques to the data recorded by national and regional broadband seismic networks of the China Earthquake Administration to image the mantle transition-zone structure beneath eastern Asia. I analyzed a total of 37427 receiver-function data. Significant topography on both the 410-km and 660-km discontinuities was clearly imaged in the 3D volume of CCP stacked images that cover an area of 102.5°-122.5°E and 22.0°-42.°N. 3D crustal and mantle velocity models were used in computing the Ps time move-outs to better image the absolute depths of the two discontinuities. The 660-km discontinuity is depressed up to 25 km along the east coast of China, indicating the presence of the subducted Pacific slab in the region. A double 660-km was observed beneath the Yellow Sea. The 410-km is depressed by as much as 15 km beneath the Quaternary Datong volcano located at the northeastern edge of the Ordos plateau in north China

Study on Disposal and Destruction of Abandoned Chemical Weapons by the Japanese Army in China

AbstractAbandoned chemical weapons (ACW) by the Japanese Army in China belong to old chemical weapons, which were produced in World WarII, buried underground or underwater. There are significant differences between old chemical weapons and chemical weapons in stock. The aim of the paper is the investigation and study on the disposal and destruction of ACW. We present the methods how to recognize and identify ACW, how to distinguish what kind of chemical warfare agents inside it. Its destruction principle and basic program of ACW, the operation technological processes for destruction of yellow munitions, red munitions, irregular munitions, contaminated solid material and water, other wastewater are specially emphasized

A Social Media Plan for the Changemakers’ Playground

The purpose of this project was to create a social media plan for the Changemakers’ Playground campaign. The Changemakers’ Playground is a website thought up by our client, Sarah Lange, whereby ordinary individuals doing extraordinary things in their community can be celebrated for the work they are doing. Each person featured on the website, also known as a Changemaker, was interviewed by Sarah and that interview was split into three videos to be posted on the Changemakers’ Playground website throughout the week they are being featured. In short, our task was to create the Facebook, Twitter, and Instagram content to accompany each of these videos in order to maximize visibility and user engagement with the Playground when it eventually launches. The group was also responsible for coming up with at least thirty hashtags to accompany the posts which would again make the posts more visible to the general public and get more people interested in the project

Shear-Wave Splitting and Mantle Flow Beneath the Colorado Plateau and its Boundary with the Great Basin

Shear-wave splitting measurements from SKS and SKKS phases show fast polarization azimuths that are subparallel to North American absolute plate motion within the central Rio Grande Rift (RGR) and Colorado Plateau (CP) through to the western rim of the CP, with anisotropy beneath the CP and central RGR showing a remarkably consistent pattern with a mean fast azimuth of 4 degrees +/- degrees 6 E of N. Approaching the rim from the southeast, fast anisotropic directions become north-northeast-south-southwest (NNE-SSW), rotate counter clockwise to north-south in the CP-GB transition, and then to NNW-SSE in the western Great Basin ( GB). This change is coincident with uppermost mantle S-wave velocity perturbations that vary from +4% beneath the western CP and the eastern edge of the Marysvale volcanic field to about -8% beneath the GB. Corresponding delay times average 1.5 sec beneath the central CP, decrease to approximately 0.8 sec near the CP-GB transition, and increase to about 1.2 sec beneath the GB. For the central CP, we suggest anisotropy predominantly controlled by North American plate motion above the asthenosphere. The observed pattern of westward-rotating anisotropy from the western CP through the CP-GB transition may be influenced to asthenospheric flow around a CP lithospheric keel and/or by vertical flow arising from edge-driven small-scale convection. The anisotropic transition from the CP to the GB thus marks a first-order change from absolute plate motion dominated lithosphere-asthenosphere shear to a new regime controlled by regional flow processes. The NNW-SSE anisotropic fast directions of split SKS waves in the eastern GB area are part of a broad circular pattern of seismic anisotropic fast direction in the central GB that has recently been hypothesized to be due to toroidal flow around the sinking Juan de Fuca-Gorda slab.National Science Foundation EAR 9706094, 9707188, 9707190, 0207812Los Alamos National Laboratory Institute of Geophysics and Planetary PhysicsNational Science Foundation Cooperative EAR-000430Department of Energy National Nuclear Security AdministrationGeological Science

Three Dimensional Quantitative Structure-Activity Relationships of Sulfonamides Binding Monoclonal Antibody by Comparative Molecular Field Analysis

The three-dimensional quantitative structure-activity relationship (3D-QSAR) model of sulfonamide analogs binding a monoclonal antibody (MabSMR) produced against sulfamerazine, was carried out by comparative molecular field analysis (CoMFA). The affinities of MabSMR, expressed as Log10IC50, for 17 sulfonamide analogs were determined by competitive fluorescence polarization immunoassay (FPIA). Removal of two outliers from the initial set of 17 sulfonamide analogs improved the predictability of the models. The 3D-QSAR model of 15 sulfonamides resulted in q2cv values of 0.600, and r2 values of 0.995, respectively. This novel study combining FPIA with CoMFA demonstrates that multidisciplinary research can be used as a useful tool to investigate antigen-antibody interactions and provide information required for design of novel haptens, which may result in new antibodies with properties already optimized by an antibody-based immunoassay