Through-Silicon Via (TSV) is a technology that enables vertical integration of silicon dies forming a single 3D-IC stack. In this paper, a practical model is proposed for the TSV assignment problem of the stacked-die ...
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Adaptive support-weight algorithm can generate high quality disparity map for stereo matching. But due to the complexity, it requires large internal memory size and bandwidth to meet the real-time constraint. In t...
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Adaptive support-weight algorithm can generate high quality disparity map for stereo matching. But due to the complexity, it requires large internal memory size and bandwidth to meet the real-time constraint. In this paper, we first analyze the requirements of this algorithm from the hardware perspective. Then we propose our Support-Weight Window Reuse (SWWR) technique which can shorten computation time by the number of disparities, and Left-Right Cost Reuse (LRCR) to achieve bandwidth reduction by more than half. The comparison states that our proposed flow can generate much better disparity results, and meets the real-time constraint with relatively low memory cost and bandwidth.
We introduce 10×10Gb/s RZ-DPSK-DWDM links in the architecture integration of MIMO-OFDM *** optical communication performance and wireless communication performance is analyzed in the integrated *** long distance ...
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We introduce 10×10Gb/s RZ-DPSK-DWDM links in the architecture integration of MIMO-OFDM *** optical communication performance and wireless communication performance is analyzed in the integrated *** long distance transmission for RZ-DPSK WDM is done,and the demodulated RZ-DPSK signal is transformed to the binary data,which is given to MIMO-OFDM-QPSK wireless communication *** MIMO-OFDMQPSK wireless system is designed with two transmit antennas and one receive antenna and four transmit antennas and one receive *** BER performance of almost 10-3 is achieved at SNR of 11 d B with four transmit antennas and one receive antenna which is better as compared to two transmit antennas and one receive *** results prove that seamless integration of RZ-DPSK-DWDM optical links with MIMO-OFDM system is suitable to simultaneously offer higher receiver performance and simplify system configuration for 4th generation wide-Area coverage mobile communication.
A hardware/software co-processing system for speech recognition applications is proposed in this paper. The system consists of a soft-core microprocessor and a dedicated hardware accelerator implemented on an FPGA...
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A hardware/software co-processing system for speech recognition applications is proposed in this paper. The system consists of a soft-core microprocessor and a dedicated hardware accelerator implemented on an FPGA. This system is intended to be used in embedded devices. By offloading computation-intensive parts of the speech recognition system. to the hardware accelerator, both faster recognition speed and lower power consumption are achieved without degrading recognition accuracy. The design is described in Verilog HDL and synthesized on a Xilinx Virtex-5 FPGA. Tests show that the proposed system runs 2.18 times faster than a pure software system.
A novel bandgap reference (BGR) with ultra low supply voltage is presented. The proposed bandgap reference uses subthreshold MOSFETs to provide temperature compensation. Analysis and comparison between proposed ba...
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A novel bandgap reference (BGR) with ultra low supply voltage is presented. The proposed bandgap reference uses subthreshold MOSFETs to provide temperature compensation. Analysis and comparison between proposed bandgap and conventional current-mode bandgap are made, and it is shown that when working with low supply voltage, the proposed bandgap is less sensitive to mismatch and power supply noise. The bandgap reference is implemented in SMIC 0.13μm RF technology, and simulation results show that it can provide the output voltage of 429 mV with a supply voltage as low as 0.6 V.
＜正＞In this letter,we describe the impact of quadrature imbalance（QI） in the presence of frequency offset and phase drift in an optical coherent offset-quadrature phase-shift-keying（OQPSK） *** the time domain,QI...
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＜正＞In this letter,we describe the impact of quadrature imbalance（QI） in the presence of frequency offset and phase drift in an optical coherent offset-quadrature phase-shift-keying（OQPSK） *** the time domain,QI tilts and squeezes the square constellation into a diamond ***’ more,frequency offset continuously rotates the *** the presence of both QI and frequency offset,the constellation becomes *** conjugate misalignment was realized in a 2×4 90°optical hybrid, and the Gram-Schmidt orthogonalization procedure（GSOP） was applied in our simulation to compensate for quadrature imbalance in the ***,the GSOP enabled a set of nonorthogonal samples to be transformed into a set of orthogonal ***,a time domain method was adopted to compensate for chromatic dispersion（CD） due to fiber ***,the frequency offset between the received optical signal and LO signal,which was 200MHz in our simulation,was estimated and corrected by the phase increment estimation ***,we recovered the ideal square constellation after carrier phase estimation.
The origin of the on-state current (I on ) difference between dopant-segregated Schottky (DSS) source/drain MOSFET and conventional MOSFET with 20nm channel length is investigated by device simulation. The simulation ...
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The origin of the on-state current (I on ) difference between dopant-segregated Schottky (DSS) source/drain MOSFET and conventional MOSFET with 20nm channel length is investigated by device simulation. The simulation results coincide well with the published experimental result. It is revealed that the not-fully-depleted dopant-segregated layer leads to a severe DIBL effect which contributes to the I on enhancement for DSS MOSFET.
A novel current-mode bandgap reference (BGR) with second-order temperature compensation is presented. The proposed bandgap reference adopts a novel structure, which takes advantage of the complementarity of second...
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A novel current-mode bandgap reference (BGR) with second-order temperature compensation is presented. The proposed bandgap reference adopts a novel structure, which takes advantage of the complementarity of second-order temperature coefficients * of triodes and subthreshold MOSFETs to provide an output with second-order temperature compensation. The bandgap reference is implemented in SMIC 0.18μm RF technology, and simulation results show that it can provide the output voltage of 510 mV with temperature coefficient of 0.6 ppm/°C over the temperature range of -20 °C ~ 80 °C.
Multiple-inputs multiple-outputs(MIMO) technology widely used in wireless system is introduced to multimode fiber(MMF) *** the typical MIMO implemented in MMF,we setup a novel MIMO system combining center launch and r...
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Multiple-inputs multiple-outputs(MIMO) technology widely used in wireless system is introduced to multimode fiber(MMF) *** the typical MIMO implemented in MMF,we setup a novel MIMO system combining center launch and ring launch instead of offset *** was investigatedthat the ring launch can induce fewer modes and the sensitivity is shown to be superior to offset launch.A mathematicsystem model was given and *** further adopt intensity modulation direct detection for transmit *** simulated results revealthat a data rate of 30 Gb/s over 800 m graded index-multimode fiber(GI-MMF) can be achieved by using this newly established MIMO.
Power amplifier drivers for software-define radio (SDR) transmitter with large gain tuning range are presented. The drivers can work with WCDMA/GSM protocol. Dynamic power control method is adopted to increase the...
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Power amplifier drivers for software-define radio (SDR) transmitter with large gain tuning range are presented. The drivers can work with WCDMA/GSM protocol. Dynamic power control method is adopted to increase the efficiency of power amplifier driver in low gain mode. The power amplifier drivers are implemented in SMIC 0.13 μm RF technology, and measurement results show that power amplifier drivers have 44 dB gain range with 2 dB gain step and 0.8 dB maximum gain step error. Also, the output of the drivers can meet the requirement of different standards with enough margin for external power amplifier (PA).
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