An interactive Web-based simulation tool called Java-DSP (J-DSP) for use in digital signal processing (DSP)-related electrical engineering courses is described. J-DSP is an object-oriented simulation environment that enables students and distance learners to perform online signal processing simulations, visualize Web-based interactive demos, and perform computer laboratories from remote locations. J-DSP is accompanied by a series of hands-on laboratory exercises that complement classroom and textbook content. The laboratories cover several fundamental concepts, including z transforms, digital filter design, spectral analysis, multirate signal processing, and statistical signal processing. Online assessment instruments for the evaluation of the J-DSP software and the associated laboratory exercises have been developed. Pre/postassessment data have been collected and analyzed for each laboratory in an effort to assess the impact of the tool on student learning.

http://jdsp.engineering.asu.edu/papers/IEEE%20Trans-Nov2005-Atti.pdf

Interactive online undergraduate laboratories using J-DSP

In this paper, we present a collection of software educational tools for introducing speech and audio compression (or coding) techniques to undergraduate and graduate students. These speech processing tools enable online simulations of speech compression algorithms that are being used in digital cellular phones, Internet streaming applications, teleconferencing, and voice over Internet protocol (VoIP) applications. This simulation software is accompanied by a series of computer experiments and exercises that can be used to provide hands-on training to class participants. With this on-line simulation tool and a set of well-complemented laboratory exercises, students can easily comprehend the basic techniques involved in speech and audio coding algorithms. Specific functions t hat have been developed include the typical modules that are usually embedded in CD-players, MP3-players, and mobile phones. Details on the software, exercises, and assessment data will be provided at the conference.

On-line simulation modules for teaching speech and audio compression techniques

Distributed wireless sensor networks (WSNs) are being proposed for various applications including defense, security, and smart stages. The introduction of hardware wireless sensors in a signal processing education setting can serve as a paradigm for data acquisition, collaborative signal processing, or simply as a platform for obtaining, processing, and analyzing real-life real-time data. In this paper, a software interface that enables the Java-digital signal processing (J-DSP) visual programming environment to communicate in a two-way manner with a wireless sensor network is presented. This interface was developed by writing nesC (an extension to the C programming language for sensors) code that enables J-DSP to issue commands to multiple wireless sensor motes, activate specific transducers, and analyze data using any of the existing J-DSP signal processing functions in real time. A series of exercises were developed and disseminated to provide hardware experiences to signals and systems and signal processing undergraduate students. The hardware with the J-DSP software has been used for two semesters in the senior level digital signal processing (DSP) course at Arizona State University. The interface, the exercises, and their assessment (instruments and results) are described in the paper.

Experiments With Sensor Motes and Java-DSP

The J-DSP editor was developed at Arizona State University (ASU) to enable students to conduct on-line simulations and experiments in digital signal processing and related subjects. In this paper, we describe a series of J-DSP communications functions and laboratory exercises that have been developed to support the laboratory portion of the ASU communications elective, EEE455. The functionality developed covers both analog and digital communications. The J-DSP communications laboratories include descriptions of relevant J-DSP functions, lab exercises illustrating the key concepts, and a short quiz that captures the main points of the assignment. The J-DSP communication labs have been assigned in EEE 455 and assessment results have been compiled. The students responded to specific questions on the labs and the J-DSP environment in general. Assessment results indicate that the majority of the students responded that the new JDSP functionality and the associated lab exercises complemented well the theory covered in class and helped them develop intuition on the communications concepts covered in these labs.

On-line laboratory for communication systems using J-DSP

This paper describes interactive Java software and modular web content developed at Arizona State University aimed at introducing elements of digital signal processing (DSP), multimedia, and communications technologies to high school (HS) students. The effort is motivated by several needs and trends that include: initiatives for graduating technology-aware HS students, the need to attract HS students from diverse backgrounds to engineering programs, emphasis on mathematics through applications that appeal to high school students, etc. The software used to support this effort is based on an NSF- funded object-oriented simulation environment called Java- DSP (J-DSP). J-DSP was developed from the ground up at ASU and enables simulations and DSP demonstrations over the internet. In addition, exercises and demonstrations can be embedded seamlessly in HTML educational modules. The web modules developed at ASU consist of HS -friendly lessons that contain J-DSP based examples connecting elements of music, telephony, and Hi-Fi entertainment to math and DSP. Efforts are underway to disseminate these materials to Phoenix high schools and assess their impact.

http://jdsp.engineering.asu.edu/papers/FIE-2003-HIGHSCHOOL.pdf

Using J-DSP to introduce communications and multuviedia technologies to high schools

J-DSP is a Java-based object-oriented programming environment that was developed at Arizona State University for use in the undergraduate DSP class [A Sapnias et al, June 2000] In this paper, we describe innovative software extensions on J-DSP to accommodate on-line laboratories for speech processing, image processing, and communications systems Significant modifications in the object-oriented GUI of J-DSP that enable simulation of feedback systems are also presented The speech processing functions enable on-line simulations of speech coding algorithms and include PCM and ADPCM quantization as well as more elaborate algorithms such as the LPC and the CELP Image processing functionalities include development of 2-D signal processing capabilities including 2-D-FFT, 2-D-filter design, and 2-D graphics and picture processing Communications functionality covers several aspects of analog and digital modulation and demodulation On-line laboratory exercises have been developed in the aforementioned areas and posted on a web site (http://jdspasuedu) This site also includes on-line evaluation forms for the exercises Statistical and qualitative evaluations that assess the learning experiences of the students that use J-DSP are presented

/pdf/on-line-laboratories-for-speech-and-image-processing-and-for-19le1f0he1.pdf

On-line laboratories for speech and image processing and for communication systems using J-DSP

The Java-DSP (J-DSP) on-line laboratory software has been developed from the ground up at Arizona State University to support the computer lab portion of the senior-level DSP course. J-DSP provides capabilities for web-based DSP simulations that can be run using a PC with a Java-enabled browser. J-DSP is accompanied by exercises that actively engage students in several concepts including Z-transforms, filter design, spectral analysis, and random signal processing. Tools and on-line instruments for assessment of the J-DSP software and the associated lab exercises have been developed and described in this letter. Statistical analysis of the pre/post assessment data revealed that the effect of student involvement and the student learning has been enhanced by using J-DSP.

On-line signal processing using J-DSP

This paper presents various on-line computer laboratory exercises and related assessment results for Java-Digital Signal-Processing-Controls (J-DSP-C). J-DSP- C is an object oriented simulation environment that is intended for control systems simulations. All J-DSP-C component functions appear as graphical blocks that can be connected to form a variety of educational controls simulations. Dynamical systems with various interconnection topologies can be developed and simulated while results can be examined graphically. J-DSP-C has been designed to be easily accessible through the internet with any computer system equipped with a Java -enabled browser.

http://jdsp.engineering.asu.edu/needs/papers/FIE-2003-CONTROLS.pdf

Thrassos Thrasyvoulou

Papers

On-line laboratories for speech and image processing and for communication systems using J-DSP

Using J-DSP to introduce communications and multuviedia technologies to high schools

On-line signal processing using J-DSP

J-DSP-C, a control systems simulation environement: labs and assessment

Java Dsp Interface With Matlab And Its Use In Engineering Education