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This paper reports a 3.0 THz detector which can detect the terahertz wave radiated by a quantum cascade laser (QCL) working at pulse mode. The detector was implemented in a 65 nm silicon CMOS process. The chip size is 1.5×l.5 mm2 including bonding pads. THz detector using FET is based on plasma wave theory proposed by Dyakonov and Shur which allows detection of THz radiations far beyond the FET devices...
This paper proposes a CMOS fully integrated 860-GHz terahertz (THz) sensor. The sensor integrates a single-NMOS THz detector, a low-noise chopper instrumentation amplifier and a high-resolution ΔΣ-ADC. The detector consists of a novel on-chip grounded patch antenna and a source-feeding NMOS field-effect transistor (FET) of the minimum size. A microstrip transmission line is designed to improve the...
This paper proposes a fully-integrated 860-GHz terahertz wave sensor. The sensor integrates a terahertz detector and readout circuit in 180-nm standard CMOS process. The readout circuit consists of a low-noise instrumentation amplifier and a high-resolution AZ-ADC. Transmissive imaging without source modulation (no lock-in technique required) is realized using the sensor. The detector consists of...
Detecting a set of facial points is a crucial phase for facial expression analysis and face recognition, yet the robust facial point detector is yet to be developed. In this paper we present a method based on Active Shape Model of Subsets (ASMS) learning from 3D models to drastically reduce the time needed to search for a point's location and increase the accuracy and robustness of the algorithm....
This paper presents a hybrid soft-output MIMO detector that searches reliable soft-information in both deterministic and probabilistic ways. The fixed-complexity sphere detector (FSD) is first applied to provide near maximum-likelihood (ML) solutions. The solutions are next used to initialize the Markov Chain Monte Carlo (MCMC) detector that uses parallel Gibbs samplers (GSs) for remaining candidate...
A W-band monolithic direct conversion receiver for passive millimeter wave imaging system using commercial 0.15 µm GaAs pHEMT technology has been realized. The receiver module consists of a two-stage preamplifier, a zero bias detector and an low pass filter. The input return loss S11 over W-band was measured, and the estimated noise equivalent power (NEP) of the detector showed the value of 7.8 pW/√Hz...
Novel designs for high-efficiency millimeter wave zero-bias detectors are presented. As the renowned backward diodes are extensively exploited in the utilization of zero bias detectors due to its preferable conduction for small reverse biases, the single-handed diode detectors reveal its inherent capabilities by the semiconductor processes which the detectors are made from. The selected process chiefly...
In this paper, we present an efficient chip for the removal of impulse noise in images. Our design uses a mask on each pixel in the image to determine whether it is likely being corrupted by random-valued impulse noise or not. After noise detection, we reconstruct the noisy pixel by considering the possible edges existed in the mask and applying a median filter on it. The memory requirement of the...
This paper analyzed the red running behaviors at urban signalized intersection. It includes unintentional red light running that is easy to arouse the sympathy of traffic managers other than intentional behavior of driver that should be punished. Based on the analysis of the driver behavior at the phase change interval, the existence of dilemma zone is regarded as an important factor, which causes...
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