GPSSIGSTRUCTURE - IMASIG-1 GPS SIGNAL STRUCTURE IMASIG-2...

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Unformatted text preview: IMASIG-1 GPS SIGNAL STRUCTURE IMASIG-2 GPS SIGNAL PARAMETERS PARAMETER C/A SIGNAL P SIGNAL CODE CLOCK RATE - R c 1.023 MCHIPS/SEC 10.23 MCHIPS/SEC CODE LENGTH 1023 CHIPS (1 ms) » 6 TRILLION CHIPS (1 WEEK) DATA RATE 50 BITS/SEC 50 BITS/SEC TRANSMISSION FREQUENCY L1 = 1575.42 MHz = 1540 R c L1 = 1575.42 MHz = 154 R c L2 = 1227.6 MHz = 120 R c DATA INCLUDES • TELEMETRY • SYNCHRONIZATION INFORMATION (PREAMBLE, TIME) • SATELLITE CLOCK AND EPHEMERIS PARAMETERS • ALMANACS • IONOSPHERIC DELAY AND UTC TIME MODELS IMASIG-3 MATHEMATICAL SIGNAL REPRESENTATION • s t AP t D t f t AC t D t f t L 1 1 01 1 01 2 2 2 ( ) ( ) ( )cos ( ) ( )sin = + + + π φ π φ b g b g • s t A P t D t f t L 2 2 02 2 2 ( ) ( ) ( )cos = + π φ b g • A = L1 P SIGNAL AMPLITUDE • P t af AND C t af = ±1 P AND C/A CODE PRN SEQUENCES • D t a f = ±1 MESSAGE DATA BIT SEQUENCE • f 1 AND f 2 = L1 AND L2 CARRIER FREQUENCIES • φ 01 AND φ 02 = AMBIGUOUS L1 AND L2 CARRIER PHASES IMASIG-4 PRN CODES • C t G t G...
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This note was uploaded on 03/24/2012 for the course CSE 459 taught by Professor Alix during the Spring '12 term at California Baptist University.

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GPSSIGSTRUCTURE - IMASIG-1 GPS SIGNAL STRUCTURE IMASIG-2...

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