this should help you.

http://www.mathworks.com.au/products/connections/product_detail/product_35405.html

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6153945&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6153945

Dear Mohamed,

To get detailed implementation of GPS signals using Matlab/ Simulink please follow the links:

https://www.researchgate.net/publication/260182830_Simulation_of_the_E1_and_E6_Galileo_Signals_using_SIMULINK?ev=prf_pub

and

https://www.researchgate.net/publication/236217926_Implementation_of_a_Complete_GPS_Receiver_on_the_C6713_DSP_through_Simulink_Receiver?ev=pr

wish you success.

Article Simulation of the E1 and E6 Galileo Signals using SIMULINK

Article “Implementation of a Complete GPS Receiver on the C6713 DSP ...

You could also try this one:

http://chameleonchips.com/gnss-sdr-toolbox-for-matlab/toolbox_v3/

Hi mohamed 

Did u find the perfect tool???

http://chameleonchips.com/gnss-sdr-toolbox-for-matlab/toolbox_v3/               

is not working anymore, Can anybody sugesst a link

Can you help me to download gpsoft toolbox matlab

please , can you help me to dowload the GNSS SDR toolbox for matlab and i note thate the site http://chameleonchips.com/gnss-sdr-toolbox-for-matlab is note working