Advanced Search
 
    English | Deutsch | Chinese  中文
Home New             
About us    
GPS / GALILEO Products
GPS Technology
A-GPS Services
Support, Tools and Help
u-blox 5 Products
ANTARIS 4 Products
ANTARIS Products
u-center    
u-center mobile
FAQ              
FAQ about GPS
u-blox 5 FAQ
ANTARIS FAQ
Legacy Products FAQ
GPS Tutorial
GPS Links  
Investor Relations
Media Relations, News New 
Careers      
Buy Samples 

Frequently Asked Questions: FAQ about GPS

Topic

 4What's Coherent/Non Coherent Integration?

What's Coherent/Non Coherent Integration?


Question:

What's Coherent/Non Coherent Integration?

Answer:

Coherent Integration means that the unit is Integrating the 1kHz repeating Spread-Spectrum Sequence (chip rate 1.023 MHz) in Sync with the Data bits from the SV. One databit has a length of 20 ms, and in coherent integration, it can integrate the correlation results over the full data bit.

Non-Coherent Integration is an integration mode which is not in sync with the data bit, and therefore results in lower C/N0 (lower SNR). Since the Data Bit edge can be in the middle of an integration period, there is the possibility that we don't see the peak in the integration result - although we are in full lock with the signal.

 
Further Information
FAQ about GPS
 
Previous EntryPrevious Entry
Next EntryNext Entry
 
 
/customersupport/faq_generic/c...
last modified: 06.10.2004

Important legal information - please read the disclaimer before proceeding.

© u-blox ag, 1997-2008