搜索结果: 1-12 共查到“航空、航天科学技术 Signals”相关记录12条 . 查询时间(0.109 秒)
GPS Modernization:Capabilities of the New Civil Signals
GPS Modernization:Capabilities Civil Signals
2015/6/26
Currently, the Global Positioning System (GPS) is undergoing stunning changes that will enhance both military and civil capabilities. We say that GPS is being modernized. In fact, this modernization i...
Performance of Hybrid Positioning System Combining GPS and Television Signals
Performance Hybrid Positioning System Combining GPS Television Signals
2015/6/25
In spite of the global coverage and the penetration into a daily life of GPS (global positioning system), GPS receivers have not been able to overcome the critical weakness of a GPS signal in indoor a...
Performance of TOA and TDOA in a Non-homogeneous Transmitter Network Combining GPS and Terrestrial Signals
Performance TOA TDOA Non-homogeneous Transmitter GPS Terrestrial Signals
2015/6/25
The time of arrival (TOA) and the time difference of arrival (TDOA) measurements are transformable to each other without a loss of information regarding positioning and thus the position estimations b...
Acquisition and Tracking of GIOVE-A Broadcast L1/E5/E6 Signals and Analysis of DME/TACAN Interference on Receiver Design
GIOVE-A Broadcast L1/E5/E6 Signals DME/TACAN Interference Receiver
2015/6/25
This paper demonstrates the tracking and acquisition of GIOVE-A broadcast L1/E5/E6 signals of the Galileo system using a multi-signal all-in-view software receiver. We show that existing aeronautical ...
Characterizing Nominal Analog Signal Deformation on GNSS Signals
Analog Signal Deformation GNSS Signals
2015/6/25
Satellite-based navigation requires precise knowledge of the structure of the transmitted signals. Accurate knowledge of the shapes of the code correlation peaks is required to ensure no biases are in...
Alternative Position Navigation & Timing (APNT) Based on Existing DME and UAT Ground Signals
Position Navigation Timing (APNT) Based Existing DME UAT Ground Signals
2015/6/24
The United States (US) Federal Aviation Administration (FAA) is developing alternative position navigation and timing (APNT) technologies to maintain efficient and safe operations even with a degradat...
Multipath Benefits of BOC vs. BPSK Modulated Signals Using On-Air Measurements
Multipath Benefits BOC vs. BPSK Modulated Signals On-Air Measurements
2015/6/24
As air traffic continues to grow, the Global Navigation Satellite System (GNSS) plays an increasingly important role in enabling the air space to efficiently handle the increase load. In fact, it will...
Remote Synchronization Simulation of Onboard Crystal Oscillator for QZSS Using L1/L2/L5 Signals for Error Adjustment
Onboard Crystal Oscillator QZSS L1/L2/L5 Signals Error Adjustment
2009/9/3
A new error adjustment method for remote synchronization of the onboard crystal oscillator for the quasi-zenith satellite system (QZSS) using three different frequency positioning signals (L1/L2/L5) i...
Bayesian Time Delay Estimation of GNSS Signals in Dynamic Multipath Environments
Bayesian Time Delay Estimation GNSS Signals Dynamic Multipath Environments
2009/9/3
A sequential Bayesian estimation algorithm for multipath mitigation is presented, with an underlying movement model that is especially designed for dynamic channel scenarios. In order to facilitate ef...
Multiple Gate Delay Tracking Structures for GNSS Signals and Their Evaluation with Simulink, SystemC, and VHDL
Multiple Gate Delay Tracking Structures GNSS Signals Simulink SystemC VHDL
2009/9/3
Accurate delay tracking in multipath environments is one of the prerequisites of modern GNSS receivers. Several solutions have been proposed in the literature, both feedback and feedforward. However, ...
Experimental Results for the Multipath Performance of Galileo Signals Transmitted by GIOVE-A Satellite
Multipath Performance Galileo Signals Transmitted GIOVE-A Satellite
2009/9/3
Analysis of GIOVE-A signals is an important part of the in-orbit validation phase of the Galileo program. GIOVE-A transmits the ranging signals using all the code modulations currently foreseen for th...
Future GNSS Signals
Future GNSS Signals
2009/9/3
This special issue of the International Journal of Navigation and Observation deals with future global navigation satellite system (GNSS) signals. It is a timely issue in view of the current US GPS mo...