搜索结果: 1-15 共查到“知识库 信息与通信工程 Signal”相关记录33条 . 查询时间(0.238 秒)
On optimal signal sets for digital communications with finite precision and amplitude constraints
Signal collection digital communications data rate the time-varying dispersive channel data rate
2015/8/12
The maximum data rate that can be reliably communicated given a linear, time-invariant, dispersive channel, a receiver that samples the channel output to within an accuracy of pm d, where dgeq 0, and ...
Real-time convex optimization in signal processing
Convex optimization signal processing coefficient of algorithm filtering array design
2015/8/7
Convex optimization has been used in signal processing for a long time, to choose coefficients for use in fast (linear) algorithms, such as in filter or array design; more recently, it has been used t...
Decision noise:An explanation for observed violations of signal detection theory
Decision noise observed violations signal detection theory
2015/7/28
In signal detection theory (SDT), responses are governed by perceptual noise and a flexible decision criterion. Recent criticisms of SDT (see, eg, Balakrishnan, 1999) have identified violations of its...
The Effects of the Ionosphere and C/A Frequency on GPS Signal Shape:Considerations for GNSS-2
Effects Ionosphere C/A Frequency GPS Signal Shape Considerations
2015/6/29
By greatly increasing the chipping rate of the pseudo random noise (prn) code, it may be possible to measure the ionosphere (TEC) in near real time, by exploiting the dispersive nature of the ionosphe...
A Proposed Signal Design for GNSS2:The Use of Faster and Longer Codes to Provide Real-Time Single Frequency Ionospheric Measurements
Signal Design GNSS Longer Codes Real-Time Single Frequency Ionospheric Measurements
2015/6/29
The design of GNSS2 presents the international navigation community a unique opportunity to design a signal for more precise positioning than is currently available with GPS and GLONASS. Faster and lo...
Transient Performance Analysis of a Multicorrelator Signal Quality Monitor
Transient Performance Analysis Multicorrelator Signal Quality Monitor
2015/6/29
The ability to monitor and detect problematic distortions in the received GPS-SPS signal is a task of critical importance. Detection of these satellite signal anomalies or “evil waveforms” (EWFs) can ...
A Simple Method of Signal Quality Monitoring for WAAS LNAV/VNAV
Signal Quality Monitoring WAAS LNAV/VNAV
2015/6/26
The integrity of the Wide Area Augmentation System (WAAS), being developed for the FAA, is of significant concern because of its intended use in commercial aviation navigation applications.
Nominal Signal Deformations:Limits on GPS Range Accuracy
Nominal Signal Deformations GPS Range Accuracy
2015/6/26
Satellite-based navigation requires precise knowledge of the structure of the transmitted signals. For GPS, accurate knowledge of the shape of the ranging codes is required to ensure no biases are int...
Effects of Signal Deformations on Modernized GNSS Signals
Signal Deformation Modernized GNSS Signals
2015/6/26
Satellite-based navigation requires precise knowledge of the structure of the transmitted signals.For GPS, accurate knowledge of the shape of the code correlation peaks is required to ensure no biases...
Evaluation of Deep Signal Fading Effects Due to Ionospheric Scintillation on GPS Aviation Receivers
Deep Signal Fading Effects Due Ionospheric Scintillation GPS Aviation Receivers
2015/6/25
Deep and frequent GPS signal fading due to strong ionospheric scintillation is major concern for aircraft navigation in the equatorial region during solar maximum periods. Deep signal fading can break...
The Signal Quality Monitor (SQM) is an integrity monitor for the Wide Area Augmentation System (WAAS). The monitor detects L1 signal waveform deformation of a GPS or a Geosynchronous (GEO) satellite m...
Methodology and Case Studies of Signal-in-Space Error Calculation Top-down Meets Bottom-up
Signal-in-Space Error Calculation Top-down Meets Bottom-up
2015/6/25
Signal in space (SIS) errors are a major error source for the Global Positioning System (GPS). They are defined as any errors related to satellite transmission, mainly satellite position and clock err...
Design and Performance of a Minimum-Variance Hybrid Location Algorithm Utilizing GPS and Cellular Received Signal Strength for Positioning in Dense Urban Environments
Design Performance Minimum-Variance Hybrid Location Algorithm GPS and Cellular Received Positioning in Dense Environments
2015/6/25
This paper shows how the complementary advantages of GPS and cellular received signal strength (RSS) positioning methods improves hybrid location estimation performance in dense urban environments. In...
Characterization of Signal Deformations for GPS and WAAS Satellites
Characterization Signal Deformations GPS WAAS Satellites
2015/6/25
Signal deformations are caused by imperfections or faults in the signal generating hardware onboard the satellites.Left uncorrected, these can lead to range errors. Thus they need to be measured and u...
GPS Signal-in-Space Anomalies in the Last Decade:Data Mining of 400,000,000 GPS Navigation Messages
GPS Signal-in-Space Data Mining GPS Navigation Messages
2015/6/25
For the Global Positioning System (GPS), signal-in-space(SIS) performance is key to the positioning accuracy and the integrity. In practice, SIS anomalies occasionally happens and the consequent user ...