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Multiplication is an important fundamental function in arithmetic operations. Multiplication based operations such as Multiply and Accumulate unit (MAC), convolution, Fast Fourier Transform (FFT), filtering are widely used in signal processing applications. As, multiplication dominates the execution time of DSP systems, we need to develop high speed multipliers. Ancient Vedic mathematics facilitates...
Digital coherent methods are anticipated in next - generation optical communications. This paper discusses development of digital coherent optical transceivers for satellite laser communications. We attempt to apply digital filters, which have already shown results in ground optical fiber communications, to phase variations with atmospheric turbulence. For testing purposes, we developed phase modulators,...
In this paper, two high-performance FPGA implementations of discrete wavelet transform (DWT) and relevant inverse discrete wavelet transform (IDWT) are proposed. At first, a DWT/IDWT aiming at a special wavelet (Daubechies 8 wavelet) is implemented. The maximum clock frequency of this design can respectively achieve 200MHz on an Altera Cyclone II platform - DE II development board, which is an obvious...
As the rapid development of radar technology, advanced multimode radars are increasing dramatically and becoming gradually the dominant branch of radar field. There is a great challenge ahead in jamming and inhibiting these radars in EW and the performance of jamming and inhibiting radars is dominantly determined by the PRI tracker system. In this paper, we present a novel PRI tracker system for tracking...
An instrument based on FPGA to determine in few periods the fundamental frequency of a electrical grid signal has been realized. A classic algorithm as Curve Fitting Algorithm has been analyzed and modified to reduce its numerical complexity. This paper shows how the floating point software algorithm has been implemented on hardware architecture in fixed point representation, controlling the accuracy.
This paper proposes a photovoltaic generation grid-connected system with cascaded multi-level inverter, based on digital signal processor TMS320F2812 and field programmable gate array (FPGA). Carrier Phase Shifting Sinusoidal Pulse Width Modulation (CPS-SPWM) based on FPGA is applied to the system. The principles of Maximum Power Point Tracking (MPPT) and the implementation of CPS-SPWM are presented...
Nowadays the need for dealing with ultra-high speed Analog to Digital Converter (ADC) is becoming more and more common, from Telecommunications to Precise Instrumentation, every application is increasing the analog to digital interface data rate. The ultra-high sampling rate of the ADCs demands the use of advanced acquisition techniques as well as the latest technology available. The utilization of...
Ultrasound imaging is an efficient, noninvasive, method for medical diagnosis. Efficient implementations of digital ultrasound systems on embedded digital signal processing on FPGA, this miniaturization enables a design with low power consumption, low noise, and light weight. This paper proposed embedded digital signal processing (DSP) for digital ultrasound imaging on FPGA (Xilinx, Inc.). The DSP...
Aiming at the requirements of real time signal processing, a cut-off frequency of 100 KHz, 16-tap direct form FIR linear-phase low-pass filter using Kaiser Window function was designed out based on DSP Builder system modeling approach. The signal waveforms in time domain and frequency domain before and after filtering were analyzed. Ultimately, a highest response frequency of 61.71MHz high-speed FIR...
This paper presents the design of high performance co-processor used to calculate the posterior probabilities for the embedded speech recognition of CHMM (Continuous Hidden Markov Model) with the MPIE (Maximum Probability Increase Estimation) algorithm to finish the most computation intensive operations in the speech recognition flow. The design of the co-processor is verified on Xilinx FPGA platform...
System Generator is a system level DSP development tool developed by Xilinx Company, which is based on the graphic modeling technology of Simulink, also is an FPGA-based signal processing modeling and design tool. This paper proposes an FPGA development method based on System Generator. Firstly it analyzes the insufficiency of traditional FPGA design flow, and then studies the advantage in FPGA development...
A smart sensor based on fiber optic gyroscope (FOG) is presented, which can measure rotation velocity and realize feedback control at the same time. The detection scheme of the smart sensor is developed with digital signal processor (DSP) and field programmable gate array (FPGA). In the smart sensor, both of the interference signal demodulation and feedback control algorithm are processed in a single...
This paper presents a critical study of modulation strategies for three level Diode Clamped Voltage Source Inverter (DCVSI) for grid connected wind turbine. The survey is carried out on two types of modulation techniques popularly used in three level DCVSI, viz. Sinusoidal PWM and Space vector PWM. Purpose of the survey is to critically analyze and identify the problems associated with existing DCVSI...
This paper presents a hardware that inspects defects on TFT-LCD cell modules and packed in a PCI-board equipped with FPGA and DSP processors. Images of TFT-LCD cell modules normally contain periodic cell patterns which make it difficult to detect defects. We propose an efficient and powerful algorithm for elimination of the cell pattern using magnitude spectrum analysis.
This paper presents an embedded omni-vision Real-Time Object Recognizing system which involves collecting image and correction, the Freeman Chain Code methods, Field Programmable Gate Array (FPGA), Digital Signal Processor (DSP) and Private Compute (PC)communication. Employing the high-perform of FPGA and intellectual property (IP) cores from Altera accelerates the speed of calculate and implements...
This paper optimizes the color space conversion algorithm based on in-depth studies of corresponding technology and the characteristics of DSP (Digital Signal Processing) unit in Vir-tex-5, i.e., DSP48E. A new method of color space conversion, i.e., DSP CSC is proposed based on DSP48E. The simulative result shows that this method can greatly improves the efficiency of color space conversion as well...
We describe our experience introducing DSP concepts via an FPGA-based advanced digital design course. The students had previously taken an introductory digital design course and a continuous-time linear systems course; a few were taking an introductory DSP course concurrently. Through a series of weekly lab exercises, the students learned advanced FPGA design methods while progressively constructing...
In this paper, we design and implement the automotive FMCW radar based on FPGA and DSP. The proposed signal processing module and RF transceiver for 77GHz FMCW radar are integrated into an experimental vehicle and tested in a real road environment. This paper presents the designed signal processing architecture and implemented processing algorithms.
An FPGA-based digital signal processing circuit to detect velocities of targets was considered for NRD guide pulse radar at 60 GHz. Because what to keep in mind is using a previously-designed digital signal processing circuit to detect distances to the targets from the radar, we add the circuit to a function to easily detect the velocities of the targets. In this paper, the digital signal processing...
Recently, demands for implementation of a high-speed image recognition function onto autonomous vehicles and robots, that is superior to that of the human eye, have been increasing. To date, analog-type vision chips and digital vision chips have been developed. Nevertheless, even now, realizing such high-speed real-time image recognition operation is extremely difficult because the template information...
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