Digital Signal Processors Research Papers (original) (raw)

Hardware and software systems are growing everyday in scale and functionality. This increase in complexity increases the number of subtle errors. Moreover, some of these errors may cause catastrophic loss of money, time, or even in many... more

- by
- •
- Computer Science, Computer Architecture, Signal Processing, Logic Programming

In this paper, a simple adaptive speed control for induction motor is described and implemented using dedicated Digital Signal Processor (DSP). The controller structure design is based on voltage/frequency (V/Hz) control scheme that transforms the three phase motor speed into voltage and generating input of sine wave of PWM. Using these voltage components, the AC induction motor can be handled in the similar way with that of DC motor. Hence, the motor control system consists of voltage control loop and PWM control loop. To realize the speed controller, the speed reference is calculated as the output of speed sensor. From the experimental results it is shown that the overall induction motor speed control system gives good transient and the steady state responses tracks the motion profile given to the system.

- by Wayne Bonser
- •
- Computer Architecture, Distributed Computing, Software Architecture, Cryptography

Digital audio processing plays an important role in many applications where the audio requires specific formats for reproduction, transmission or storage. The fundamental function of the Mini Stereo Digital Audio Processor (MSDAP) is to... more

Digital audio processing plays an important role in many applications where the audio requires specific formats for reproduction, transmission or storage.
The fundamental function of the Mini Stereo Digital Audio Processor (MSDAP) is to implement a finite impulse response (FIR) digital filter.

- by Aalay D Kapadia
- •
- VLSI and Circuit Design, Digital Signal Processors, ASIC Design
- by Simon Dimaio and +1
- •
- Geology, Remote Sensing, Digital Signal Processing, Ground Penetrating Radar

Improving the conversion efficiency of solar panels has become a challenging area of study for researchers. Solar trackers are an alternative to reach this goal, as has been shown in many cases, by tracking the position of the sun changes, the productivity of the panel increases. This paper presents a new design of a dual-axis solar tracker system based on a real-time measurement of solar radiation in order to improve the conversion efficiency. As a first design stage, the dynamic models for solar radiation, solar panel and electromechanic system, were obtained using Matlab-Simulink. Then a control unit for capturing the signals from radiation sensors and an inertial measurement unit, was implemented in a High-Performance 16-Bit Digital Signal Controller DSPIC33FJ202MC. The acquired data are compared with a mathematical algorithm to calculate sun's position and set the control action to orient the panel. An embedded system with real-time sampling was developed. It does not rely on external databases and takes into account the relative position between the radiation sensor and solar panel to improve the efficiency of the system. Results show an increase of 9.87% in the energy obtained with the solar tracker compared to a static solar panel oriented optimally. The tests were performed using two solar 200W panels operating simultaneously under the same climatic conditions.

- by Cesar Silva
- •
- Engineering, Signal Processing, FPGA, Digital Signal Processing

Workloads drive architecture design and will change in the next two decades. For high-performance, general-purpose processors, there is a consensus that multimedia will continue to grow in importance. The authors predict these processors will incorporate more media processing capabilities, eventually bringing about the demise of specialized media processors, except perhaps, in embedded applications. These enhanced general-purpose processor capabilities will arise from multimedia applications that require real-time response, continuous-media data types and significant fine-grained data parallelism

- by pradeep kumar
- •
- Animation, Parallel Processing, Digital Signal Processors, Architectural Design

—This paper deals with a video content classification based on spatial and temporal information. The main goal of the paper is to find out whether the non-expert test subjects are able to correctly recognize the spatial and temporal information and how precise is the corresponding parameterization of video content based on these two attributes. Moreover, how well do the objective values provided by the tool deployed in this experiment correlate with the subjective ones. The subjective measurement has shown that the non-expert test subjects are able to correctly recognize the spatial and temporal information only for the extreme scenes in terms of the spatial and temporal information but have experienced some problems when it comes to a more granular classification. When it comes to the objective assessment, the SI and TI values provided by the tool used in this experiment correlate quite well with the subjective data obtained from the basic test for the spatial information.

- by Peter Pocta
- •
- Telecommunications Engineering, Spatial Analysis, Telecommunications, Service Quality

Microprocessor is a very useful tool for our modern communication. In fact the performance of any computer is vastly dependent on them. In this paper we have focused on the evolution of the microprocessors first, and then went for the categorization, organization, operation and some other fundamental things. Discussed about the several cycles that a microprocessor goes through and at last gave some ideas and aspects of assembly language programming.

- by AITLJ journal and +1
- •
- Digital Signal Processors, Microprocessors and Microcontrollers, ASSEMBLY LANGUAGES, Micro Processors

In this paper, we discuss how asynchronous design techniques can be used in the implementation of continuous-time signal processors. Such processors are presented by signals developed by continuous-time analog-to-digital converters which involve no sampling, and thus do not exhibit aliasing; in addition, the resulting in-band quantization error is lower than in conventional techniques. Several design considerations are given, and preliminary experimental results are presented.

- by William Li
- •
- Signal Processing, VLSI, Digital Signal Processors, Quantization
- by JOSE RODRIGUEZ
- •
- Engineering, Digital Signal Processors, Sampling methods, Predictive models
- by yvan bonnassieux and +1
- •
- Engineering, Digital Control, Nonlinear Control, Digital Signal Processors

This research paper aims at comparing two multi-core processors machines, the Intel core i7-4960X processor (Ivy Bridge E) and the AMD Phenom II X6. It starts by introducing a single-core processor machine to motivate the need for multi-core processors. Then, it explains the multi-core processor machine and the issues that rises in implementing them. It also provides a real life example machines such as TILEPro64 and Epiphany-IV 64-core 28nm Microprocessor (E64G401). The methodology that was used in comparing the Intel core i7 and AMD phenom II processors starts by explaining how processors' performance are measured, then by listing the most important and relevant technical specification to the comparison. After that, running the comparison by using different metrics such as power, the use of HyperThreading technology, the operating frequency, the use of AES encryption and decryption, and the different characteristics of cache memory such as the size, classification, and its memory controller. Finally, reaching to a roughly decision about which one of them has a better over all performance.

The work aims to investigate into the modern concept of cognitive radio and details about its functioning. The ideas that led to its invention and the thoughts that led to this modern technology of using white spaces in the most efficient way. It aims to take a dig into the earlier radios namely the conventional radio and the software defined radio and later on modifications of those that ultimately led to cognitive radio. Not only that but it deals with every nuance between each of them. Various persons including the person who was the propagator of the concept of cognitive radio technology Dr. Joseph Mitola and various organizations have tried to define cognitive radio and the discussion considers all those definitions to let the reader get a clear picture regarding their understanding as far as defining cognitive radio is concerned. The requirements of cognitive radio in various fields and the future scope of the technology are profoundly dealt with. A network of cognitive radios known as cognitive radio network (CRN) is also the matter of discussion in the latter half of the work. Various components of the CRN and certain details regarding it are included with appropriate diagrams as per requirements

- by Cajetan Akujuobi and +1
- •
- Engineering, Communication systems, Robust control, Controller Design

Due to their system complexity and high component cost, stepped frequency continuous wave radars have not been popular in the ground penetrating radar industry. However, over the last decade the cost of RF technologies has decreased considerably, making it more feasible to make SFCW GPRs. This paper discusses the implementation and development of a low cost SFCW GPR using digital radio technology, a homodyne single channel receiver and a digital signal processor. The radar operates over a bandwidth from 490 MHz to 780 MHz and is capable of taking a single depth profile measurement using 256 frequency steps in less than 0.5 seconds. The results of field trials are also presented

- by Michael Inggs
- •
- Geology, Remote Sensing, Digital Signal Processing, Ground Penetrating Radar
- by Atle Lohrmann
- •
- Data Mining, Digital Signal Processing, Digital Signal Processors, Transducers

A novel method of estimating the rotor position and speed of a permanent magnet (PM) synchronous motor using a high-speed digital signal processor by measuring stator quantities is described. The basic idea of this method stems from exploiting the saliency characteristics of a PM synchronous machine. A complete vector control drive of a PM synchronous machine with position estimator has been simulated using the PC-based SIMNON program. The simulation results show that the performance of the machine with position estimator is in close agreement with that of a position sensor. Since the estimation algorithm needs few instructions, such as multiplications and additions and subtractions, it is well suited for real-time application using a high-speed digital signal processor

- by Bimal Bose
- •
- Digital Control, Algorithm, Parameter estimation, Digital Signal Processors
- by Fred Harris
- •
- Mechanical Engineering, Signal Processing, Digital Signal Processing, Performance
- by John Eldon
- •
- Computer Architecture, Digital Signal Processing, Digital Signal Processors, Hardware
- by García de Vicuña
- •
- Engineering, Distributed System, Control Systems, Microcontrollers

This paper presents a reconfigurable processor for different digital signal processing applications. The performance of the proposed architecture has been evaluated by taking different dsp applications like Low pass filter, high pass filter, finite impulse response (FIR) filter and FFT module. We designed the architecture of the processor and realizing the architecture using adder, multiplier, delay unit and validate it in the FPGA, which show that the hardware scheme is feasible for practical application. The experimental results clearly reveal the novelty of the architecture for dsp applications. This paper investigates the potential use of FPGAs for implementing efficient " Reconfigurable Processor " for different dsp applications. The proposed processor is based on parallel re-configurable which is implemented on FPGA. FPGAs have become an important component for implementing these functions with respect to cost, performance and flexibility. The general purpose SPARTAN 3AN FPGA kit has been employed for developing reconfigurable processor, with all the coding done using the hardware description language VERILOG.

This paper describes a digital control method for single-phase grid-connected inverter system with an LCL filter for distributed generation application. Digital PI Current Controller is applied as the control method. The control algorithm is implemented in low cost Digital Signal Processor (DSP) TMS320F2812 eZdsp board. The control method provides robust current regulation and achieve unity power factor. Simulation and experimental results are provided to demonstrate the effectiveness of the design.

- by yvan bonnassieux
- •
- Engineering, Digital Control, Nonlinear Control, Digital Signal Processors
- by Prof. Dr. Saad Mekhilef
- •
- Engineering, Computer Science, Atmospheric Modeling, Computer Hardware