A Novel Fast Acquisition Method for L2C Code for GPS Based Radio Occulted Systems: A FPGA Based Implementation
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 3, Issue 5
Abstract
L2C (L2 band carrier) is the second Global Positioning System (GPS) civilian signal to become available over the full constellation. Because of the unusually-long ranging codes used in L2C signal, the search space and the computational complexity for signal acquisition become huge. 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 intermediate frequency in digital format. The signal thus converted is processed by high level programming language to compute position and velocity. The radio occultation (RO) technique, which makes use of radio signals transmitted by the global positioning system (GPS) satellites, has emerged as a powerful and relatively inexpensive approach for sounding the global atmosphere with high precision, accuracy, and vertical resolution in all weather conditions over both land and ocean. Basic measurements for the GPS Radio Occultation are excess carrier phase and carrier Doppler from the GPS satellites because of refraction. To measure these carrier phases and Doppler one has to acquire the signals, first. The time window of occulted signals will be very narrow. So one has to acquire the signal as soon as possible, otherwise we will miss the occultation. Conventional acquisition algorithms usually take 8 to 32 seconds for the acquisition of occulted signals, depending upon the received signal strength and Doppler. This paper aims at reducing the acquisition time in the range of 1 second to few milliseconds. GPS signals are transmitted at L1 as well as L2C frequencies. The paper will be aiming at acquisition of L2C signals
Authors and Affiliations
Anila K*1
Keywords
Related Articles
- EP ID EP127652
- DOI -
- Views 72
- Downloads 0
EFFECT OF QUANTUM PARAMETER–H ON LONGITUDINAL ELECTRO– KINETIC WAVE CHARACTERISTICS IN MAGNETISED SEMICONDUCTOR PLASMA
Using quantum hydrodynamic model, linear characteristics of longitudinal electro-kinetic wave have been studied both analytically and numerically, in one component magnetised dense semiconductor quantum plasma in...
ENHANCING SECURITY OF CLOUD DATA FROM DATA MINING BASED ON FULLY HOMOMORPHIC ENCRYPTION
The advancement in technology, industry, e-commerce and research. A large amount of complex and pervasive digital data is being generated which is increasing at an exponential rate and often termed as Big data. For anal...
SUGAR FACTORY AUTOMATION USING 8051
The main aim of this paper is to design and employ of saving time and reduce human efforts in like sugar industry, foodindustry, and coal industry.Generally an industry consists of many number of electrical and electro...
PERFORMANCE ANALYSIS OF AIR COOLED WATER COOLER BY USING ECO - FRIENDLY REFRIGERANT S AS A POSSIBLE SUBS TITUTE OF R134A
The EU F - gas regulation would take effect from January 1,2015. The regulation implies an HFC phase - down from 2015 to 2030 by means of bans on high GWP refrigerants. Especially R134a is under pressure and likely...
A REVIEW: IMPROVED NETWORK MONITORING AND ANALYSIS BY MULTICHANNEL PACKET-ANALYSIS SYSTEM (MPAS)
Today we are seeing that computer networks are increasing in their sizes very rapidly. Number of its user increased in past few years and traffic flows in networks also increased, so it’s very important to mon...