© Fraunhofer IIS/Alexander Rügamer
The following Flexiband L125 III-1b configuration was used:
| Band | Band width |
Center freq |
Inter-mediate frequ ency |
Sampling rate |
Sample
|
USB data rate |
[MHz] |
[MHz] |
[MHz] |
[MHz] |
[MBit/s] |
||
L1/E1bc |
18 |
1575,420 |
0 |
20 |
2x 4 (complex) |
640 |
L2/L2C |
18 |
1227,600 |
0 |
20 |
2x 4 (complex) |
|
L5/E5a |
38 |
1176,450 |
0 |
40 |
2x 4 (complex) |
Using a static scenario we recorded one 210 s and one 15 s long set of data using the previously described L125 Flexiband Configuration III-1b.
The multiplexed, raw data streams are available here (L125_III1b_15s.usb, L125_III1b_210s.usb). The description of the exact multiplexed data format will be provided in an updated version of this page. Please unzip before using.
The demultiplexed data streams were extended to an 8bit/sample I/Q format can be found here:
The following Matlab code example can be used to read in the raw, demultiplexed data, please unzip before using:
FS = 20e6; % Sampling Rate for L1 / L2; FS = 40e6 for L5 freqIF = 0; % Same for L1, L2 and L5 NrOfSamples = 1e6; fid = fopen(L125_III1b_15s_L1.bin', 'r'); A = fread(fid, NrOfSamples, 'int8'); % 8 bit / sample fclose(fid); data_i = A(1:2:end); data_q = A(2:2:end); input_cmplx=data_i + j*data_q; |
Note that the I and Q components are Multiplexed: 8bit-I | 8bit-Q | ....
The simulated Spirent scenario is depicted in figure "Simulated Spirent GPS/Galileo scenario":
The exact simulated satellite information is available upon request.
Moreover, 15 s and 210 s long raw data collections have been carried out with the same Flexiband unit and configuration using the roof antenna of Fraunhofer IIS. The filenames indicate the date/time when the data was collected.
The multiplexed, raw data streams are available here (20140923_20-15-55_L125_roof_15s.usb, 20140923_20-15-55_L125_roof_210s.usb). The description of the exact multiplexed data format will be provided in an updated version of this page.
The demultiplexed data streams were extended to an 8bit/sample I/Q format can be found here, please unzip before using:
All example files are provided under a “Creative Commons” BY- NC license:
That means you are free to use these recorded files for non-commercial work while giving credit to Fraunhofer IIS and citing this website.
Fraunhofer Institute for Integrated Circuits IIS