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This paper considers a low-complexity Gaussian Message Passing Iterative Detection (GMPID) algorithm for Multiple-Input Multiple-Output systems with Non-Orthogonal Multiple Access (MIMO-NOMA), in which a base station with antennas serves sources simultaneously. Both and are very large numbers and we consider the cases that $N_u>N_r$. The GMPID is based on a fully connected...
This paper considers a iterative Linear Minimum Mean Square Error (LMMSE) detection for the uplink Multiuser Multiple-Input and Multiple-Output (MU-MIMO) systems with Non-Orthogonal Multiple Access (NOMA). The iterative LMMSE detection greatly reduces the system computational complexity by departing the overall processing into many low-complexity distributed calculations. However, it is generally...
This paper considers a low-complexity Gaussian Message Passing Iterative Detection (GMPID) method over a pairwise graph for a massive Multiuser Multiple-Input Multiple-Output (MU-MIMO) system, in which a base station with M antennas serves K Gaussian sources simultaneously. Both K and M are large numbers and we consider the cases that K < M in this paper. The GMPID is a message passing algorithm...
A neural recording IC with a new spike detection scheme is proposed to minimize power dissipation while preserving the waveform information of the detected spikes. A delta modulator is employed in the recording IC to reduce signal dynamic range and enable low-voltage operation. A series of output values from the delta modulator are stored in a small amount of analog memory to extract two key features...
We report the design, fabrication and characterization results of 585 GHz focal-plane arrays (FPAs) using Sb-based heterostructure backward diodes (Sb-HBDs) integrated with lens-coupled folded-dipole antennas (LC-FDAs). Under impedance matching condition, a responsivity of 9,800 V/W at 585 GHz for a single array element detector can be achieved based on simulation results. In order to expand the single...
In allusion to infrared non-uniformity noise of robot vision imaging, an infrared non-uniformity correction algorithm based on zereo virtual perimeter diaphragm strips is proposed, which does not need any prior information. This algorithm initially executes one-point correction to the perimeter detectors using zero virtual perimeter diaphragm strips. Then based on the scene information and shift between...
The design and testing of a broadband quasi-optical THz Schottky-diode detector is described. Initial measurements yielded a responsivity of 1000-300 V/W over the frequency range from 150-400 GHz. The effect of the antenna geometry on the performance, and the methods used to calibrate the waveguide and quasi-optical detectors will be described.
The fast spreading worm is becoming one of the most serious threats to today's networked information systems. A fast spreading worm could infect hundreds of thousands of hosts within a few minutes. In order to stop a fast spreading worm, we need the capability to detect and contain worms automatically in real-time. While signature based worm detection and containment are effective in detecting and...
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