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This work presents a technique to reduce the phase errors of quadrature signals. The proposed concept is demonstrated on a 2.4-GHz single-sideband up-converter in a 0.35-/spl mu/m BiCMOS process. The quadrature LO signals are obtained on-chip by means of two coupled oscillators, achieving a figure-of-merit of 186 dB. The image-rejection ratio improves by 7 to 11dB across the 28% LO tuning range wi
The aim of this study is to systematically compare parametric and non-parametric techniques for analyzing trends in annual NDVI derived from NOAA AVHRR sensor in order to examine how trend type and departure from normality assumptions affect the accuracy of detecting long-term change. To generate annual data, the mean NDVI of a four-month long ‘green’ season was computed for fifteen sites (located
An adaptive predictor for discrete time stochastic processes with constant but unknown parameters is described. The predictor which in real time tunes its parameters using the method of least squares is called a self-tuning predictor. The predictor has attractive asymptotic properties. If the parameter estimation converges and if the predictor contains parameters enough, then it will converge to t
This paper focuses on the special individuals, called “Edisons”, who contributed to the development and acceptance of two major radical innovations, frozen food and self-service, in Sweden after 1945. The “Edisons” were passionate enthusiasts, making extraordinary efforts and doing more than their jobs, and they could also be contributing from outside the innovative organisations. At times people
Researchers have asked for practical examples of collaborative supply chain initiatives like VMI and how they are designed. Especially cases in other industrial settings than retail are rare. One important question to answer is how well these initiatives are working in other settings and how they could be designed to improve supply chain efficiency. The objective of this paper is to give a descrip
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