GNSS_SDR_C

This is a software GNSS receiver in C based on the receiver in "A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach"

Get start

step1: run "make" command step2: run "./GNSS_Receiver"

Requirements

gsl libirary is needed, if you don't install it, you can execute the following steps to install it.

1. download the gsl source code(https://ftp.gnu.org/gnu/gsl/)
2. step into the source code file
3. run ./configuration
4. run make and wait untill it finishs.
5. run sudo make install
6. install the gls-dev sudo apt-get install libgsl-dev After these steps, you are ready to compile this project.

Test Environment

code has just tested in ubuntu 20.04.1

Running the GNSS SDR software

1. step into this folder
2. config this software receiver to suit your signal file all configuration can be done in only one file named initSetting.c these are variables you may need to modify
   • fileName( the name of your signal file )
   • msToProcess( total processed time )
   • intermediatFreq( intermediate frequency )
   • samplingFreq( sampling frequency )
3. run make
4. run ./GNSS_Receiver

Results description

• L1Ant1.dat is a signal file generated by a simulator(NOT I/Q FILE). it's intermediate frequency is 1.42MHz, and sampling frequency is 10MHz. Data type is int8.
• IE.dat, IP.dat and IL.dat are I path results of ealy code path, prompt code path and late code path respectively. QE.dat, QP.dat and QL.dat have the similar meaning.
• pos.dat is the output of postion, once one millisecond.

Notes

this code most is ported from the software receiver in "A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach". So if you want to know more details, you can read this book or send email to me.