Satellite navigation system for optimal time to first fix using code and carrier diversity

摘要

A satellite navigation receiver and method for enhancing time to first fix are provided. The receiver comprises a radio frequency (RF) translator, correlator blocks, and a navigation data processor. The RF translator conditions navigation signals over carrier frequencies. The correlator blocks comprise a predetermined number of correlator channels configured for the carrier frequencies. The predetermined number of correlator channels is divided for parallel collection of sub-frames of navigation data across one or more operation service codes. The sub-frames of navigation data are collected across one or more operation service codes and on one of the carrier frequencies. The sub-frames of navigation data are collected across the carrier frequencies and on one of the operation service codes. The sub-frames of navigation data are collected across the carrier frequencies and across the operation service codes. The navigation data processor processes the parallelly collected sub-frames to estimate position of the satellite navigation receiver.

主权项

1. A satellite navigation receiver, comprising:
a radio frequency translator comprising two input channels for receiving navigation signals over one or more of a first carrier frequency and a second carrier frequency from one or more satellites, wherein said radio frequency translator conditions said navigation signals over said one or more of said first carrier frequency and said second carrier frequency; one or more correlator blocks comprising a predetermined number of correlator channels configured for said first carrier frequency and said second carrier frequency, wherein said predetermined number of said correlator channels is divided for parallel collection of sub-frames of navigation data from said navigation signals across one or more operation service codes, wherein said parallel collection of said sub-frames of said navigation data comprises one of:
parallelly collecting said sub-frames of said navigation data across said one or more operation service codes and on one of said first carrier frequency and said second carrier frequency;parallelly collecting said sub-frames of said navigation data across said first carrier frequency and said second carrier frequency and on one of said one or more operation service codes; andparallelly collecting said sub-frames of said navigation data across said first carrier frequency and said second carrier frequency and across said one or more operation service codes; and a navigation data processor for processing said parallelly collected sub-frames of said navigation data to estimate position of said satellite navigation receiver;whereby said parallel collection of said sub-frames of said navigation data across said first carrier frequency and said second carrier frequency and/or across said one or more operation service codes reduces a time to first fix parameter of said position of said satellite navigation receiver.