AS a result of the steadily increasing congestion in communication bands of the electromagnetic spectrum, efforts are being made to utilize new ranges, particularly microwave and optical frequencies, and to better exploit existing frequency allocations. The latter tasks have led to improvements in communication techniques (SSB modulation, multiplexing, digital systems, spread spectrum applicati...

When intense redaction is needed to protect data subjects’ confidentiality, statistical agencies can release synthetic data, in which identifying or sensitive values are replaced with draws from statistical models estimated from the confidential data. Specifying accurate synthesis models can be a difficult and labor intensive task with standard parametric approaches. We describe and empirically...

Previous research (e.g. Cawley [1, 2]) has demonstrated that arti cial neural networks can be trained to generate the speech sounds corresponding to a sequence of phonetic tokens, including the e ects of coarticulation required to produce natural sounding synthetic speech. The principal limiting factor in the performance of neural speech synthesizers has been found to lie in the amount of train...

In this paper, we propose an all-digital frequency output of the synthesizer. High reference frequency (REF) is synthesizer architecture, based on an all-digital XA-frequency used to push the spurs far from the carrier. The need for high discriminator. The new all-digital synthesizer is compared to sampling frequency, in addition to the resolution being previously published work. The architectu...

To dramatically reduce the need for Silicon frequency synthesizer is always measured in integer mode reproduction due to poor noise performance, a close-loop first and then measured in fractional mode. The fractional simulation platform that combines both measured and/or mode would yield the same phase noise performance when simulation results of open-loop PLL sub-blocks has been compared to th...

Despite their high degree of reconfigurability and friendliness to technology scaling, traditional ADPLL-based frequency synthesizers tend to come at the price of increased power consumption at their feedback path, compared to charge-pump based solutions. The main power consumption bottleneck is the TDC that operates at the high output frequency rate. A modified version of the ADPLL architectur...

2 A review of PLL theory 3 2.1 PLL components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 Reference frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.2 Phase detectors (and charge pumps) . . . . . . . . . . . . . . . . . . . . . . . 4 2.1.3 Loop filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Figure 12: a) High-level block diagram of the segmented quantizer; b) quantization block details; c) signal processing model .. Figure 16: Estimated power spectra of a) the quantization noise sequences, and b) the running sums of the quantization noise sequences of the first-order ∆Σ modulator and the segmented quantizer presented in Section IV before and Ian Galton supervised the research whic...

Version 4g, August 2006 Two methodologies are presented for predicting the phase noise and jitter of a PLLbased frequency synthesizer using simulation that are both accurate and efficient. The methodologies begin by characterizing the noise behavior of the blocks that make up the PLL using transistor-level RF simulation. For each block, the phase noise or jitter is extracted and applied to a mo...