Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 18 of 18 for “"Analog signal processing"”.
-
Analog Signal Processing Elements for Energy-Constrained Platforms
Energy constrained processing poses a number of challenges that have resulted in tremendous innovations over the past decade. Shrinking supply voltages and limited clock speeds have placed an emphasis on processing efficiency over the raw throughput of a processor. One of the approaches to increase …
-
Space Communication Channel Emulation Using Digital and Analog Signal Processing
… and reconstructing the digital data to its analog counterpart. Delay, Doppler shift, Gaussian noise, and fading are among the most prevalent characteristics of such a channel, and thus were the focus of this thesis. Special care was given to the design of each digital and analog component to …
-
Low cost analog signal processing for massive radio telescope arrays
… The primary time of interest corresponds to a signal in the the 100-200MHz frequency band. The Omniscope is a new type of radio telescope array being developed at MIT which images the entire sky in this band at low resolution using spatial Fourier transforms. In order to gain the maximum …
-
Reconfigurable Discrete-time Analog FIR filters for Wideband Analog Signal Processing
… is the implementation of wideband and flexible signal processing in communication and sensing applications. Although software defined radio (SDR) is a possible solution, it may not be practical due to the excessive requirements for analog-to-digital converter (ADCs) and digital filters for …
-
Power-Efficient Voltage-Mode RF Front-End Using Quantized Analog Signal Processing
… the overall power consumption of both the signal and local oscillator (LO) paths. My contributions to the state-of-the-art SAW-less receivers for my PhD addresses the abovementioned issues and can be summarized in the following major points: 1) for the first time, voltage-mode approach was …
-
A reconfigurable analog-to-digital converter for a mobile receiver
… rates. The boundaries between digital and analog signal processing is impending closer to the antenna, therefore aiming for a software-defined radio solution. In terms of analog-to-digital converters (ADCs) of mobile terminal receivers, this indicates higher sample rate, lower power …
-
A test of parity conservation in proton-proton scattering at 15 MeV
… at a 1 kHz rate. The experiment used analog signal processing; the corre1at1.on between the cross section and the beam he1icity was measured using a phase-locked amplifier. The means for rapidly reversing the beam polarization and the methods for reduction of systematic errors are …
-
Synthetic biological circuits for continuous signal processing
… cells will need to be capable of similar signal processing and computation in order to operate efficaciously in complex environments, like the human body. In this thesis I describe the development of synthetic biological circuits that enable such capabilities. In the first chapter, analog …
-
Passive switched-capacitor based filter design, optimization, and calibration for sensing applications
… are reviewed. An RF sampler followed by analog signal processing is identified as a critical block enabling low-power wideband digitization. Passive switched-capacitor charge-domain processing is introduced. Its implementation simplicity and lack of active power consumption are enticing. …
-
An AFE based embedded system for physiological computing
… of such systems entails discrete sensors and analog sub-systems known as the analog front end (AFE) for biosignal acquisition, conditioning, and vital bridging function. Being discrete and analog, signal processing is limited. Besides, with large form factor, component counts and power …
-
Systemanalyse und Entwicklung Six-Port basierter Funkempfängerarchitekturen unter Berücksichtigung analoger Störeffekte
… is an enormous interest to develop appropriate analog receiver front-ends. In this respect, one promising candidate group is the Six-Port-based direct conversion receiver. The presented work focuses on the investigation of Six-Port-based mobile receiver front-ends with their specific …
-
Noise shaping techniques for analog and time to digital converters using voltage controlled oscillators
… density that can be utilized to implement analog signal processing functions in interesting and unconventional ways, for example by leveraging time as a signal domain. In this context, voltage controlled ring oscillators are circuit elements that are not only very attractive due to their …
-
Wideband RF Front End Daughterboard Based on the Motorola RFIC
… of software-defined radio (SDR) is to move the processing of radio signals from the analog domain to the digital domain — to use digital microchips instead of analog circuit components. Until faster, higher-precision analog-to-digital (ADCs) and digital-to-analog converters (DACs) become …
-
Extreme electromagnetic phenomena over an ultrathin platform
… are explored to perform ultrafast and low loss analog signal processing. Fano resonance provides a strong nonlocality in transverse momentum space, which supports different types of mathematical operations near the speed of light. Furthermore, nonlinear meta-structures are studied to manifest a …
-
Diseño de circuitos analógicos y de señal mixta con consideraciones de diseño físico y variabilidad
… is far behind the EDA tools that are made for analog circuit design automation. While digital circuits rely, in general, on two stable operation states (which brings inherent robustness against numerous imperfections and interferences, leading to few design constraints like area, speed or power …
-
Scalable and Reconfigurable True-Time Delay Line for Integrated Radio-Frequency Recurrent Neural Processors
… scalable and tunable delay-line architecture for analog recurrent neural networks (RNNs) operating directly in the RF-domain. Previous research has shown the RF-domain RNNs are capable of performing real-time anomaly detection in wireless systems while reducing the inference latency of the …
-
ΚΥΜΑΤΙΚΑ ΦΙΛΤΡΑ ΔΙΑΚΟΠΤΟΜΕΝΟΥ ΠΥΚΝΩΤΗ
OVER THE PAST FIFTEEN YEARS THE SWITCHED CAPACITOR (SC) FILTERS HAVE BECOME INTERESTING ALTERNATIVES TO OTHER TYPES OF FILTERS, FOR REALIZING HIGH QUALITY, LOW-COST INTEGRATED CIRCUIT FILTERS FOR LOW FREQUENCY APPLICATIONS. IN THIS THESIS A DIRECT Z-DOMAIN SIMULATION OF LC LADDER AND UNIT-ELEMENT …