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Polar codes has a better bit error rate (BER) performance than low-density parity-check (LDPC) and turbo codes with lower coding and decoding complexity. The polar-coded cooperation can provide significant enhancement of data rate and link reliability. However, simply binary coded cooperation cannot meet the requirements of spectral efficiency. In order to improve the spectral efficiency, this paper...
The pLDMOS related devices fabricated by a TSMC 0.25 µm 60 V process was investigated in this paper. For the ESD improvement, some DUTs inserting the N+ zone to form an embedded SCR in the drain end or guard-ring area, respectively. From the TLP testing results, the It2 values of the drain parasitic SCR npn-type and pnp-type could reach > 7 A, higher than that of the traditional pLDMOS device....
In this paper, a commutation torque ripple suppression strategy is proposed with commutation time in multiples of PWM period. Firstly, the commutation time of different modulation strategies required to suppress commutation torque ripple is analyzed, and the main factors that influence commutation time are pointed out. Then, according to the shortest commutation time, the non-commutation phase modulation...
The impacts of current-path variation on the ESD robustness of nLDMOS devices as the drain-side modulation by a 0.18 μm/40 V process are evaluated in this paper. From the transmission-line-pulsing (TLP) measurement, the secondary breakdown current (It2) of an nLDMOS with the drain-side embedded SCR structure & "pnp" arrangement (DUT-2) increased from 2.498 A up to > 7 A (at least...
RF-PAs in 4G LTE mobile devices handle modulated signals with high peak-to-average power ratios (PAPRs) while maintaining linearity and power efficiency. Envelope-tracking technology increases the efficiency of an RF-PA by modulating its supply voltage proportionally to the RF signals. The function of an envelope-tracking supply modulator (ETSM) is to track the envelope information and provide the...
The diagnosis of disease with the aid of computer programs has been developing more and more in recent years. This paper presents an approach which is based on frequency technique for the objective quantitative analysis of facial paralysis. In this method, limited-orientation modified circular Gabor filters (LO-MCGFs) are used to enhance the desirable frequencies in images. Then, features are extracted...
Based on the numerical simulations of the generalized nonlinear Schrödinger equation (NLSE), initial appearance and maximum conversion of modulation instability (MI) are investigated on different noise conditions in optical fiber. Furthermore, considering the noise condition, the expressions of critical power for MI threshold and maximum power conversion are obtained.
This paper proposed an oscillator-based ultrasonic sensor interface that can be applied to intravascular applications. The readout circuits are validated with a capacitive micromachined ultrasonic transducer (CMUT) and a current-to-frequency chip. The CMOS CMUTs are integrated with a current amplifier on the same chip and the current-to-frequency chip provides the current-to-frequency readout interface...
Utilizing the advantages of less bandwidth requirement and chromatic dispersion penalty, PAM4 modulation has been discussed for Ethernet optical transceiver as well as passive optical network, including the low-cost 100GE 2km, 400GE 2km/10km/40km solutions and high-speed 25Gbps/40Gbps PON. Meanwhile, the system performance has also been evaluated experimentally.
Molecular communication is the most promising approach for the communication in nanonetwork. However, the reliability of existing system degrades rapidly when the distance between transmitter and receiver increases. In this paper, we propose and evaluate a cooperative molecular communication solution that uses signal repeating to improve system reliability. The system has low complexity. Simulation...
A 12-bit Hybrid DAC architecture with split Nyquist (1GS/s) and delta-sigma modulator path (8GS/s) has been proposed and implemented in 65nm CMOS. Based on the hybrid architecture, the delta-sigma assisted pre-distortion scheme compensates for the current steering cell mismatch that further reduces the analog circuit complexity and area. The proposed 8X unrolled pipeline delta-sigma modulator allows...
We experimentally demonstrate WDM-VLC employing CAP modulation and commercially available RGB-type LED. The record aggregate data rate of 3.22 Gb/s with the BER of less than 10-3 is successfully achieved over >25-cm air-transmission.
A novel BInaural Spectro-Temporal (BIST) algorithm is proposed in this paper to increase the speech intelligibility in low or negative SNR noisy environments. The BIST algorithm consists of two modules. One is the spatial mask for receiving sound from the specific direction, and the other is the spectro-temporal modulation filter for noise reduction. Most speech enhancement algorithms are not applicable...
We demonstrate photonic transmitters-mixers integrated with Wilkinson power-combiners. Compared with single-ended operation, double-ended operation exhibits 5.5-dB higher output power over wide frequencies (65–100GHz). 15Gbps error-free wireless transmission with 6.6dBm output at 93 GHz is achieved.
By combing ultra-fast photonic-transmitter-mixers and envelop detectors with record-high modulation (26 GHz) and video bandwidths (37 GHz), respectively, error-free on-off-keying wireless transmission at W-band with data rate as high as 25 Gbit/sec can be achieved.
We demonstrate a novel photonic transmitter-mixer (PTM) module with state-of-the-art wide optical-to-electrical (OE) (66–116 GHz), intermediate-frequency (IF) modulation bandwidths (26 GHz), and a low coupling loss (−2 dB). The full module is composed of an active near-ballistic unitraveling-carrier photodiode (NBUTC-PD) and the passive millimeter-wave components, which are fabricated on the aluminum...
We demonstrated near-ballistic uni-traveling-carrier photodiode based broadband photonic transmitter-mixers with quasi-Yagi radiators fed horn antennas. By adopting a novel design in the intermediate-frequency (IF) port of such device, we can further extend the IF (bias) modulation bandwidth of NBUTC-PD to over 14GHz. Wireless data transmission with record-high on-off keying date rate as 20-Gb/s via...
We demonstrated near-ballistic uni-traveling-carrier photodiode based broadband photonic transmitter-mixers with quasi-Yagi radiators fed horn antennas. 100 GHz wireless transmission with date rate as high as 12.5-Gb/s via bias modulation under high photocurrent (20 mA) has been achieved.
In this paper, link adaptation, which dynamically selects modulation level and coding rate according to the channel condition, and several multi-input multi-output (MIMO) transmission modes are studied. As we know, the subchannels' signal-to-noise radio (SNR) by singular value decomposition (SVD) are unequal, which requires different modulation and coding schemes (MCS) to maximize the throughput....
We demonstrate W-band photonic transmitters-mixers, which are composed of near-ballistic-uni-traveling-carrier-photodiodes and quasi-Yagi antennas without integrating Si-lens. By utilizing it, data-transmission at W-band can be achieved under bias modulation of 1.25-Gb/s BPSK with 5GHz IF signals.
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