Results 31 to 40 of about 425,883 (279)
A 0.45pJ/conv-step 1.2Gs/s 6b full-Nyquist non-calibrated flash ADC in 45nm CMOS and its scaling behavior [PDF]
, 2009 A 6-bit 1.2 Gs/s non-calibrated flash ADC in a standard 45nm CMOS process, that achieves 0.45pJ/conv-step at full Nyquist bandwidth, is presented. Power efficient operation is achieved by a full optimization of amplifier blocks, and by innovations in the
Annema, Anne-Johan +5 more
core +3 more sources
Remote Sensing, 2023 Given the potential of low-earth orbit (LEO) satellites in terms of navigation enhancement, accurately estimating the differential code bias (DCB) of GNSS satellites and LEO satellites is an important research topic. In this study, to obtain accurate DCB
Yifan Wang +4 more
doaj +1 more source
Navigation, 2022 A modified generalized trigonometric series (GTS) function is presented for the joint estimation of local ionospheric activities and differential code biases (DCBs) of the third-generation BeiDou navigation satellite system (BeiDou-3).
Ningbo Wang +3 more
doaj +1 more source
The effect of local area unemployment on compensating wage differentials for injury risk [PDF]
, 2011 Copyright 2011 Elsevier B.V., All rights reserved.Peer reviewedPublisher ...
Bender, Keith A., Mridha, Hosne
core +1 more source
Estimating Satellite and Receiver Differential Code Bias Using Relative GPS Network [PDF]
, 2018 Abstract. Precise Total Electron Content (TEC) are required to produce accurate spatial and temporal resolution of Global Ionosphere Maps (GIMs). Receivers and Satellites Differential Code Biases (DCBs) are one of the main error sources in estimating precise TEC from Global Positioning Systems (GPS) data.
Alaa A. Elghazouly +2 more
openaire +1 more source
Single-Flux-Quantum Bipolar Digital-to-Analog Converter Comprising Polarity-Switchable Double-Flux-Quantum Amplifier [PDF]
, 2017 We present a single-flux-quantum (SFQ)-based digital-to-analog converter (DAC) generating bipolar output voltages, in which the key component is a polarity-switchable double-flux-quantum amplifier (PS-DFQA). The DAC comprised a dc/SFQ converter, an 8-bit
Hiroshi Shimada +2 more
core +2 more sources
Remote Sensing, 2021 Observable-specific bias (OSB) parameterization allows observation biases belonging to various signal types to be flexibly addressed in the estimation of ionosphere and global navigation satellite system (GNSS) clock products. In this contribution, multi-
Min Li, Yunbin Yuan
doaj +1 more source
Cosmological constraints on a decomposed Chaplygin gas [PDF]
, 2013 Any unified dark matter cosmology can be decomposed into dark matter interacting with vacuum energy, without introducing any additional degrees of freedom.
De-Santiago, Josue +4 more
core +2 more sources
Epoch-Wise Estimation and Analysis of GNSS Receiver DCB under High and Low Solar Activity Conditions
Remote Sensing, 2023 Differential code bias (DCB) is one of the main errors involved in ionospheric total electron content (TEC) retrieval using a global navigation satellite system (GNSS). It is typically assumed to be constant over time.
Xiao Zhang +3 more
doaj +1 more source
Remote Sensing, 2020 The new generations of global navigation satellite system (GNSS) space vehicles can transmit three or more frequency signals. Multi-frequency observations bring a significant improvement to precise point positioning ambiguity resolution (PPP AR). However,
Gen Liu +4 more
doaj +1 more source