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GPS RECEIVER DESIGN DEVELOPMENT TESTING


a device that is capable of receiving information from GPS satellites and then to calculate the device's geographical position. Using suitable software, the device may display the position on a map, and it may offer directions. GPS receivers are the most important hardware in a GPS surveying operation. Their characteristics and capabilities influence the techniques available to the user throughout the work. There are many different GPS receivers on the market. Some of them are appropriate for surveying,

Development of the low-cost RTK- GPS receiver with an open source program package RTKLIB
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Abstract: RTKLIB is an open source program package for RTK-GPS developed by the authors. RTKLIB is a compact and portable program library written in C to provide a standard platform for RTK-GPS applications. The library implements fundamental navigation functions

GPS receiver system noise
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In radio-based communication and navigation ystems, noise originate, from variou sources: the equipment itself; other electrical devices such as radio transmitters, microwave ovens, motor, relays, ignition systems. and light dimmers; and natural terre trial and extraterrestrial

NovAtelGPS Receiver the High Performance OEM Sensor of the Future
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Abstract In this paper, the 10 channel NovAtel GPSCard receiver is presented. This receiver is available as a low cost, high performance GPS sensor, providing features and capabilities to support all OEM applications. NovAtel, a cellular systems and subscriber equipment

A 12-channel real-time GPS L1 software receiver
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A GPSreceiver has been developed that runs 12 tracking channels in real-time using a software correlator

Acquisition schemes for software GPS receiver
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ABSTRACT This paper discloses two new acquisition approaches to improve the efficiency of conventional acquisition methods used in GPS software receivers. The first single side band approach will reduce the process time and search time of the conventional approach

A single GPS receiver as a real-time, accurate velocity and acceleration sensor
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ABSTRACT The determination of velocity and acceleration from GPS measurements is very important for many dynamic applications, but also for airborne gravimetry and geophysics, as long as we can achieve the specific accuracy and resolution for each application. The

Interference benefits of a vector delay lock loop (VDLL) GPS receiver
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ABSTRACT The interference benefits of a vector delay lock loop (VDLL) GPS receiver are compared by simulation over those of a conventional receiver as a first step before hardware implementation. Besides improvement to interference performance, other benefits to the

NMEA 0183: A GPS receiver interface standard
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University of New Brunswick tion. The power supply and antenna may also be in the same package. Such single-unit, autonomous receivers are very convenient especially for applications in which small size and portability are desirable features. However, there are

GPS signal acquisition and tracking-An Approach towards development of Software-based GPS Receiver
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Abstract Software-based GPS (SGR) Receiver helps us processing the GPS signal at the lowest level of GPS raw signal data from the antenna. A software-based GPS receiver consists of a front-end device that converts the radio frequency signal from the antenna to an

Detection and mitigation of spoofing attacks on a vector-based tracking GPS receiver
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ABSTRACT Position solutions provided by GNSS receivers can be completely misled by spoofing attacks. Consequently detection and mitigation of spoofing signals have become one of the important topics within the GNSS community. Some recently published work has

Navigator GPS receiver for fast acquisition and weak signal space applications
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ABSTRACT NASA Goddard Space Flight Center (GSFC) is developing a new space-borne GPS receiver that can operate effectively in the full range of Earth orbiting missions from Low Earth Orbit (LEO) to geostationary and beyond. Navigator is designed to be a fully space

GPS errors statistical analysis for ground receiver measurements
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This work describes a most GPSreceiver error measurementsPage 6. Receiver Errors Dynamics of parameters found (pseudo-noise sequence phase drift and accuracy of signal detection time) at a solution is a quality index of userGPSreceiver

Test results of a digital beamforming gps receiver in a jamming environment
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ABSTRACT NAVSYS High Gain Advanced GPS Receiver (HAGR) uses a digital beam- steering antenna array to provide additional gain in the direction of the GPS satellite signals. This increases the received signal/noise ratio on the satellites tracked and also improves the

High precision kinematic positioning using single dual-frequency GPS receiver
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Currently, high precision kinematic GPS positioning with centimetre level accuracy can only be carried out using differential GPS (DGPS) positioning techniques which require the deployment of base receiver stations. The requirement to deploy base receiver sta- tions, however, spatially A Talking GPS Receiver for the Blind1

Spaceborne GPS receiver performance testing
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This report describes a generic test concept to assess the tracking performance of a spaceborne GPS receiver based on hardware-in-the-loop simulations. The test setup and configuration for a Spirent STR4760 GPS signal simulator are specified and the data

A fast ambiguity resolution technique for RTK embedded within a GPS receiver
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Abstract GPS carrier phase integer ambiguity resolution is still the key issue and challenge for high accuracy RTK survey and navigation. Due to speed and memory limitations of OEM GPS receiver boards, the calculation efficiency is of prime importance since it affects the

Real-time spoofing detection using correlation between two civil GPS receiver
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ABSTRACT A real-time method for detecting GPS spoofing in a narrow bandwidth civilian GPS receiver has been implemented and tested, both in the absence of and in the presence of spoofing. The system was implemented as a softwaredefined radio system on a personal

GPS receiver performance using inertial-aided carrier tracking loop
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ABSTRACT Radio frequency interference (RFI) has been a perplexing problem, affecting the navigation quality of the Global Positioning System (GPS). The presence of the RFI, or even hostile jamming, will reduce the effective received signal power, and thus degrade

TOPSTAR 3000-an enhanced GPS receiver for space applications
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GPS receivers are now widely used for Low Earth Orbit (LEO) spacecraft applications for both scientific and commercial programmes. New applications are also under study, such as navigation in Geostationary Earth Orbit (GEO) and Geostationary Transfer Orbit (GTO),

The evolution of the GPS receiver
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We have reached another GPS milestone. Just a few months ago, GPS World celebrated its 10th anniversary. The first issue of the magazine (a bimonthly in its first year of publication) appeared in January/February 1990. TheInnovationcolumn has appeared in every

GPS Precision Orbit Determination: Measured Receiver Performance
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1 he Motorola-developed GPSDR is the first dual- frequency GPSreceiver to be applied to POD. Anwere measured by a modified GPSreceiver after being received by the antenna under test. The data points thus obtained

Attitude determination methods used in the polarx2@ multi-antenna gps receiver
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ABSTRACT Septentrio has designed a lightweight single-board position/attitude determination system based on its unique multi-antenna dual-frequency GNSS receiver, PolaRx2@, which receives and provides measurements from 3 antennas. One of the

Performance analysis of an FFT based fast acquisition GPS receiver
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ABSTRACT The performance of a parallel/serial FFT based acquisition unit for weak signal GPS processing is analysed. Parallel search in the code delay domain is implemented via FFT correlation. Frequency domain search is performed in a serial fashion. A catastrophic

GPS receiver architecture for autonomous navigation in high Earth orbits
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The Global Positioning System (GPS) has been used extensively for navigation of satellites in low Earth orbits (LEO), and several commercial receivers exist that can provide reliable and efficient onboard navigation solutions for these applications [7, 13, 47, 74]. The prospect

Consumer-grade GPS receiver measurement accuracy in varying forest conditions
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ABSTRACT A variety of affordable consumer-grade Global Positioning System (GPS) receivers are novv available for natural resource applications in forested environments. Consumer-grade GPS receivers have the potential to provide a lovv-cost solution for

Assessment of a non-dedicated GPS receiver system for precise airborne attitude determination
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ABSTRACT The use of a non-dedicated GPS receiver system for attitude determination was assessed in airborne mode through a test conducted at Sandia National Laboratories. Four independent NovAtel GPSCardTreceivers were installed in SandiaTwin Engine Otter

Test results of the PiVoT receiver in high earth orbits using a GSS GPS simulator
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Several organizations have undertaken efforts to develop new space GPS receivers that will satisfy this need. This paper presents results of tests conducted on the PiVoT GPS receiver under development at NASA Goddard Space Flight Center

FPGA based GPS receiver design considerations
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ABSTRACT A project to build a GPS receiver using an FPGA for base-band processing began in 2004. The new receiver platform uses a commonly available RF front end ASIC to convert the GPS signals to a suitable IF. The digital design for baseband processing is

Qualification of a commercial dual-frequency GPS receiver for the e-POP platform onboard the Canadian CASSIOPE spacecraft
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CASSIOPE, the CAScade demonstrator Smallsat and IOnospheric Polar Explorer, is a Canadian satellite scheduled for launch in 2007. It is a hybrid mission designed for a wide range of tasks including space-based communication, high capacity information delivery,

Flight tests of an unmanned air vehicle with integrated multi-antenna GPS receiver and IMU: towards a testbed for distributed control and formation flight
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Current research includes the development of a modular real-time controller design platform and the design and verification of flight control algorithms for optimal flight mode switching and high maneuverability (including aerobatics). In addition, Stanford recently purchased a

Construction and performance characteristics of a prototype NBS/ GPS receiver
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The receivedsatellitesign als gave an RMS time fluctuation of the receiver output as good as 3.5 nanoseconds for an omni antenna using 15 second averages. The noise was characterized as white noise phase modulation, which can be averaged below the

A real-time cycle-slip detection and repair method for single frequency GPS receiver
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AbstractIn GPS receivers, carrier phase measurement can be used to improve the receiverposition accuracy. In order to maintain the accuracy, cycle-slip must be detected and repaired instantaneously and accurately. This paper first analyzes the implementation of

Implementation and testing of a real-time software-based GPS receiver for x86 processors
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ABSTRACT Given the demanding computational requirements of software-based GPS receivers, high data processing efficiency is required to obtain real-time performance. There are two basic approaches to accomplish this: reducing the number of computations required,

acquisition to tracking and coasting for software GPS receiver
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Abstract The goal the software GPS receiver is to do acquisition and real-time tracking of GPS C/A codes in software using a receiver front-end, an Analog-to-Digital converter (ADC) and a PC to do the processing. To start tracking two parameters need to be obtained from

Evaluation of the pseudorange performance by using software GPS receiver
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Abstract. An algorithm is developed to process IF signal data from a GPS RF front-end module, which consists of a down converter and an ADC. The down converter converts the signal from RF to IF, the ADC samples the IF signal. All the other processing including signal

Receiving the L2C signal with NamuruGPS L1 receiver
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It can also better serve the increasing population of dual frequency civil users, where a GPS receiver can use the two frequencies to eliminate the ionospheric error and more quickly resolve phase ambiguity. It will lead to improved positioning accuracy and quicker operation

A Software GPS Receiver Application for Embedding in Software Definable Radios
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ABSTRACT The Software Defined Radio (SDR) is an enabling technology that is being leveraged across a wide range of areas within the wireless industry to provide efficient and comparatively inexpensive solutions to several constraints posed in current systems. Since

Space navigation with digital beam steering GPS receiver technology
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ABSTRACT Space-based GPS technology presents several significant challenges over Earth based systems. These include visibility issues for rotating platforms, and tracking of GPS satellites from spacecraft that are in higher orbits than the GPS. Kinematic relative

Assessing the accuracy of high sensitivity GPS receiver for location based services
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ABSTRACT This contribution presents practical results with a High-Sensitivity GPS (HSGPS) receiver in Delft, the Netherlands. One outdoor experiment was carried out on a favourable location and acts as a reference. Next, two indoor experiments were carried out, each over a

Real-time spoofing detection in a narrow-band civil GPS receiver
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ABSTRACT A real-time method for detecting GPS spoofing in a narrowbandwidth civilian GPS receiver has been implemented and tested, both in the absence of and in the presence of spoofing. The system was implemented as a software-defined radio system on a personal

Study of GPS based ionospheric scintillation and its effects on dual frequency receiver
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This paper presents a study of L-band scintillations for the year 2005 from Bhopal (23.2º N, 77.6º E) which is located under the equatorial anomaly crest. A GSV4004A GPSreceiver has been operational which provides the total electron content and L-band scintillation

Testing of the ICESat BlackJack GPS receiver engineering model
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ABSTRACT This paper describes the performance testing done on the Ice, Cloud, and Land Elevation Satellite (ICESat) GPS receiver engineering model (EM) at the University of Texas at Austin Center for Space Research (CSR). The goal of this research was to achieve a

Real time estimation of GPS receiver clock offset by the Kalman filter
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Abstract. The global positioning system (GPS) is a one-way, all-weather, real time, and world- wide radio navigation system whose main purpose is to provide a GPS dedicated receiver with a signal that allows a user to compute accurately and in real-time the longitude, latitude,

Test Results of a High Gain Advanced GPS Receiver
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ABSTRACT NAVSYS High Gain Advanced GPS Receiver (HAGR) uses a digital beam- steering antenna array to enable up to eight GPS satellites to be tracked, each with up to 10 dBi of additional antenna gain over a conventional receiver solution. This digital, PC-based

Using the Canadian active control system (CACS) for real-time monitoring of GPS receiver external frequency standards
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ABSTRACT The Canadian Active Control System is a national network of twelve continuously operating geodetic quality GPS receivers equipped with external atomic frequency standards. Each GPS tracking station provides dualfrequency pseudorange and

Integration of a 40 channel gps receiver for automatic control into an unmanned airplane
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ABSTRACT Stanford UniversityGPS Laboratory has developed, in coordination with Trimble Navigation Ltd., a new 40 channel GPS receiver specially designed for automatic control of an unmanned airplane. Recent flight tests of the airplane have demonstrated the

Novel approach to determine the effects of MS environment using the portable GPS receiver with built-in antenna
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Abstract: Communication impairment on the Mobile Satellite (MS) path for non-geostationary satellite is mainly due to effect of multipath and shadowing. In order to study the signal quality received by the MS user, a receiver system that has similar characteristics to the

International reports: Technical directives for standardization of GPS time receiver software
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of GPS and the civil timing community. The Group has identified two principal impedi- ments to its objective of sub-nanosecond accuracy in GPS common-view time transfer: (a) limitations in the software and hardware of the different GPSreceiver manufacturers; and (b

Pototype software-based GPS receiver for reflected signal analysis
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Abstract-We will discuss about the prototype software-based GPS receiver for reflected signal analysis. The receiver consists of a dual-antenna front-end device that down-converts the signals from the antenna to an intermediate frequency and digitize them at certain

Performance testing of a real-time software-based GPS receiver for x86 processors
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ABSTRACT Given the demanding computational requirements of software-based GPS receivers, high data processing efficiency is required to obtain real-time performance. There are two basic approaches to accomplish this: reducing the number of computations required,

A Pedestrian Dead Reckoning System Integrating Low-Cost MEMS Inertial Sensors and GPS Receiver .
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Abstract The body-mounted inertial systems for pedestrian navigation do not require any preinstalled facilities and can run autonomously. The advantages over other technologies make it especially attractive for the applications such as first responders, military and

Dual frequency absolute calibration of GPS receiver for time transfer
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ABSTRACT This paper suggests a receiver time delay calibration method using a GPS simulator. The method has been used to get the receiver time delay of an Ashtech Z12T receiver. The method enables to compute an absolute time delay in the L1-and L2-

Error reduction of a low cost GPS receiver for kinematic applications based on a new Kalman filtering algorithm
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Abstract. Positioning for kinematic applications is of great importance in terms of accuracy and computational complexity. In this paper, we present an algorithm based on correlation between error components in three directions, ie x, y, z to decrease positioning error of a

TEC determination over single GPS receiver station using PPP technique
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ABSTRACT Bernese GPS Software (BGS) version 5.0 is now capable of processing un- differenced GPS observations. The most important reason for this enhancement of BGS software are that processing un-differenced data gives access to the satellite and receiver

TEC measurement by single dual-frequency GPS receiver
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ABSTRACT By GPS dual-frequency receiver, the Total Electron Content (TEC) along the path from satellite to receiver can be measured directly. But the dual-frequency measurement can be severely colored by the thermal noise in the GPS receiver and the bias

Enabling Location Based Services with a Combined Galileo/ GPS Receiver Architecture
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ABSTRACT Several new requirements and challenges are introduced with the transition of traditional navigation applications towards location based services. The three most important ones are low cost, low energy consumption, and high sensitivity. This paper

Stochastic modeling of GPS receiver clocks for improved positioning and fault detection performance
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ABSTRACT A multiple-state stochastic clock model of a GPS receiver clock is derived using methods that have been successfully applied in existing models for high-quality satellite clocks. An advantage of having a stochastic receiver clock model is that it can lead to

Analysis of GPS visibility and satellite-receiver geometry over different latitudinal regions
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Given that users obtain their positions by receiving radiowave signals transmitted from its continuously orbiting satellites, proper functioning of a GPSreceiver requires uninterrupted signal reception from at least four orbiting satellites with good satellite-receiver geometry

Accuracy Estimation of GPS Receiver Parameters with Re-Reference System in Static Mode.
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