Moushumi Zaman

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J-DSP is a java-based object-oriented programming environment that was developed at Arizona State University for use in the undergraduate DSP class [1]. 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(More)
In this paper, we propose a novel signaling scheme based on wideband time-varying chirp signals for frequencyhopped code division multiple access (FH-CDMA) techniques. Our new method has been motivated by the inherent resistance of chirp signals against channel imposed distortions as chirps are bandwidth efficient and robust to fading. Specifically, we(More)
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(More)
 Time-frequency representations (TFRs) such as the spectrogram are important two-dimensional tools for processing time-varying signals. In this paper, we present the Java software module we developed for the spectrogram implementation together with the associated programming environment. Our aim is to introduce to students the advanced concepts of TFRs at(More)
"In an ever more globalized world, communication and access to information is not a luxury within firms, but a most important issue that used to improve collaboration within firms. " Globalizing organizations, outsourcing, mobile work, inter-organizational teams, innovation, and reaching out to suppliers and customers are driving today's need to improve(More)
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