System and method for a digital navigation satellite receiver

US5347284A · kind A · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• John P. Volpi · Garland, US
• Leonard John LaPadula, III · Rochester, US
• Chyi H. Lu · Plano, US
• Hugh Logan Scott · Breckenridge, US
• Mitchel B. Stiles · Plano, US
• David W. Rekieta · Allen, US

Key dates

• Filing date: Feb 28, 1991
• Grant date: Sep 13, 1994
• Expiry date: Feb 28, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/37
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

There is disclosed a global positioning system receiver method and system which converts the analog signals to digital signals prior to performing signal acquisition and GPS unique processing functions. The A/D converter uses full null zone processing to increase anti-jamming capability and 4-level output to reduce signal processing. A single analog and digital channel is used for both the L1 and L2 channels as well as for all P(Y)-code and C/A-code thus allowing full multi channel tracking with several channels each tracking a separate signal while the remainder of the channels rove over all of the signals on the alternate L-band with programmable duty cycles. The system allows for Y-code substitution for P-code by multiplexing a portion of the Y-code generated between multiple channels.