This work presents and estimates the break-lock in phase locked loop (PLL) synthesizers for monopulse radar applications through experimental measurements and computer simulation. Sinusoidal continuous wave (CW) and linear frequency modulated (LFM) signals are used as repeater jamming signals. The CW jamming signal power as a function of radar echo signal power at break-lock is estimated for di...

Latest Updates at http://www.ece.uah.edu/courses/ee426/ 3-1 Chapter 3: Phase-Lock and Frequency Feedback Techniques Figure 3-1 depicts a block diagram of a phase-lock loop (PLL). A considerable number of variations of this basic architecture have been proposed and used. However, many of these variants are mathematically equivalent to the loop described here. For reasons that will become clear a...

Edward Liu and Alberto L. Sangiovanni-Vincentelli Department of Electrical Engineering & Computer Sciences University of California Berkeley, California 94720 Abstract This paper presents behavioral representations for detectors and voltage-controlled oscillators that are independent of circuit architectures. Parameter extraction techniques are described. Finally, parameter extraction for a VCO...

This project develops PLL macros that use novel digital architectures to achieve a user configurable optimum balance between phase noise, frequency resolution, frequency switching time, and power consumption. The PLL macros are implemented in SiGe BiCMOS to take advantage of the good phase noise and power consumption attributes. The digital nature of the implementation facilitates easy porting ...

This paper presents a new laser lock-in thermography (LLT) technique for nondestructive evaluation. LLT utilizes a modulated continuous wave laser beam as a heat source to obtain high fidelity thermal wave images even at the presence of background heat disturbances. The thermal waves propagating along the surface and through-the-thickness directions of a structure are visualized using newly dev...

A non-data aided carrier recovery technique using modulation format identification is proposed. This technique can also be interpreted as a modulation identification method that is robust against static phase and frequency offsets. The performance of the proposed technique is studied and analytical expressions derived for the mean acquisiton time to detect lock in the cases of -PSK, , and -QAM ...

This thesis describes a method for real-time vision-based localization in human-made environments. Given a coarse model of the structure (walls, floors, ceilings, doors and windows) and a video sequence, the system computes the camera pose (translation and rotation) in model coordinates with an accuracy of a few centimeters in translation and a few degrees in rotation. The system has several no...

This paper presents a complete low-voltage 3V single supply analog lock-in amplifier (LIA) based on phase sensitive detection technique (PSD) for processing AC sensor signals buried in noise in embedded wireless applications. Reference and bias sensor signals are provided by a quadrature oscillator. Experimental results confirm the capability of the proposed lock-in amplifier to effectively rec...

The phase vocoder is a standard frequency domain time-scaling technique suitable for polyphonic audio, but it generates annoying artifacts called phasiness, or loss of presence, and transient smearing, especially for high values of the time-scale parameter. In this paper, a new time-scaling algorithm for polyphonic audio signals is described. It uses a multi-scale Gabor analysis for lowfrequenc...

This paper presents a control logic for anti-lock braking systems (ABS). ABS are by now a standard component in every modern car, preventing the wheels from going into a lock situation where the wheels are fixed by the brake and the stopping distances are greatly prolonged. There are different approaches to such control logics. An ABS design proposed in recent literature controls the wheel’s sl...