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Digital Signal Processing ( DSP )

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lightbulbAbout this topic
Digital Signal Processing (DSP) is a field of study that focuses on the manipulation and analysis of digital signals using algorithms and mathematical techniques. It encompasses the conversion, filtering, enhancement, and interpretation of signals to improve their quality and extract meaningful information, primarily in applications such as audio, image, and communication systems.
lightbulbAbout this topic
Digital Signal Processing (DSP) is a field of study that focuses on the manipulation and analysis of digital signals using algorithms and mathematical techniques. It encompasses the conversion, filtering, enhancement, and interpretation of signals to improve their quality and extract meaningful information, primarily in applications such as audio, image, and communication systems.

Key research themes

1. How can digital signal processing improve fingerprint image enhancement and verification reliability?

This research area focuses on advancements in digital signal processing (DSP) methods to enhance the quality of fingerprint images, extract reliable features, and improve verification accuracy despite image degradations and distortions. These methods, leveraging co-occurrence matrices, contextual filtering, wavelets, and statistical analyses, aim to overcome challenges such as noise, non-rigid transformations, and ridge distortions that affect biometric security systems.

Key finding: This work proposes a novel fingerprint verification method that enhances fingerprint images using contextual filtering and analyzes texture based on four statistical descriptors derived from the co-occurrence matrix. The... Read more
Key finding: The study introduces a reconfigurable digital signal processing architecture optimized for efficient implementation of common DSP functions, including filtering and transforms used in biometric image enhancement. This... Read more
Key finding: Presents a segmented discrete wavelet transform (SegWT) optimized for real-time DSP, which processes signal parts with low memory cost while preserving wavelet coefficient accuracy. This method reduces signal distortion at... Read more

2. What advances in digital filter design and hardware implementation improve performance and flexibility of DSP systems?

This theme examines innovations in digital filter design, including finite impulse response (FIR) and infinite impulse response (IIR) filters, as well as hardware implementation strategies for DSP processors that balance speed, precision, and resource utilization. Approaches involve distributed arithmetic, fixed- and floating-point number representations, and LabVIEW/TMS320C6000 platforms to optimize DSP system design for real-time applications with emphasis on robustness and cost efficiency.

Key finding: Highlights the critical role of digital filters in DSP, emphasizing design techniques that ensure desirable signal characteristics such as linear phase and stability. The paper details methodologies for designing FIR and IIR... Read more
Key finding: Systematically introduces DSP fundamentals with focus on algorithmic implementations and limitations, featuring computationally efficient methods such as distributed arithmetic and their application for filter design. The... Read more
Key finding: Proposes a low-power, high-speed multiplier architecture optimized for DSP applications that tolerate minimal computational error. By minimizing switching activity via enabling adder cells only when necessary and using a... Read more

3. How can digital signal processing and optical systems integrate to enhance high-speed data transmission and spatial audio applications?

This theme investigates DSP's role in optical communication systems and immersive audio technologies, where advanced modulation, spatial multiplexing, and signal processing algorithms improve system throughput, bandwidth efficiency, and user experience. Key focuses include VCSEL-based modulation, multi-core fiber spatial division multiplexing (SDM), and binaural processing techniques for reconstructing and enhancing spatial sound fields.

Key finding: Demonstrates a 107-Gbit/s net-rate optical DMT signal transmitted over multi-core fibers using a 1.5-µm single-mode VCSEL combined with a Volterra series-based nonlinearity-tolerant DSP equalization algorithm. This approach... Read more
Key finding: Reviews integration strategies for spatial division multiplexing (SDM) optical networks combining multi-core and few-mode fibers with DSP-transceiver designs and optical switching architectures. The study emphasizes spatial... Read more
Key finding: Introduces a time-frequency DSP method that extracts panning coefficients from stereo recordings via co-occurrence matrix analysis and reconstructs an expanded sound stage using binaural processing. The technique preserves... Read more

All papers in Digital Signal Processing ( DSP )

The multi core fibre can be successfully applied not only the long-haul ultra-high capacity transmission but also in data interconnects and integrated distribution networks. In this paper, the proposed application areas are reviewed.
WDM-PON is considered for converged fixed mobile broadband access networking. We propose to utilize lowcost tunable lasers at the remote sites, together with a centralized wavelength locker. Practical implementations require a... more
Electrocardiogram (ECG or EKG) is basically a diagnostic tool that measures and records the electrical signal by comparing the activity of heart. Electrocardiogram has significant importance since it reveals important information about... more
Oldja meg Laplace-transzformációval az alábbi differenciálegyenletet az adott kezdeti feltételek mellett! A differenciálegyenlet: Mit jelent ez? A differenciálegyenlet azt jelenti, hogy a függvény, és a deriváltja is előfordul az... more
Sistem hybrid digital merupakan gabungan antara sistem analog dan sistem digital yang bertujuan untuk mengoptimalkan keunggulan keduanya. Dalam era transformasi digital yang cepat, sistem ini memainkan peran penting dalam berbagai... more
In this paper, a novel architecture of RNS based 1D Lifting Integer Wavelet Transform (IWT) has been introduced. Advantage of Residue Number System (RNS) based Lifting Scheme over RNS based Filter Bank and non-binary IWT has been... more
En este estudio se recogen los resultados de la aplicación de la técnica de búsqueda de señales SETI o firmas técnicas extraterrestres conocida como “Deriva Doppler” sobre los ficheros de datos de radio obtenidos por el Radiotelescopio... more
Space division multiplexing (SDM) has been proposed as the ultimate solution to address the capacity crunch of optical transport networks. The efficient utilization of SDM requires some forms of spatial integration which is expected to... more
This paper presents the design of a new digital signal processing (DSP) stand alone evaluation board for real time application using TMS320F28335 DSP processor. A standalone evaluation board is a general purpose board with an embedded... more
In this article, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation (PAM-4) over 100-m OM4 multi-mode fiber (MMF) employing a multi-mode 850-nm vertical-cavity surface-emitting laser (VCSEL)... more
In this article, we experimentally demonstrate the transmission of 112 Gb/s four-level pulse amplitude modulation (PAM-4) over 100-m OM4 multi-mode fiber (MMF) employing a multi-mode 850-nm vertical-cavity surface-emitting laser (VCSEL)... more
Je ne peux commencer ces remerciements sans exprimer ma profonde gratitude envers l'ensemble des membres de mon jury de thèse. Je remercie Bertrand Granado ainsi que Marc Winter pour avoir acceptés d'évaluer ce travail en qualité de... more
We experimentally demonstrate a net-rate 503.61-Gbit/s discrete multitone (DMT) transmission over 10-km 7-core fiber with 1.5-µm single mode VCSEL, where low-complexity kernelrecursive-least-squares algorithm is employed for nonlinear... more
DECOMPOSITION OF RECORDED DATASETS BY USING INVERSE BASE VECTORS
HENGERES CSŐFAL AKUSZTIKUS IMPULZUS VÁLASZÁNAK KÖZELÍTÉSE
“Mirrored Image Source and Sensor Method”
‘Wavel’
Robust, Low Noise IIR Filter