Yafeng Li E-Mail: [email protected] [email protected]

Nagaraj Channarayapatna Shivaramaiah E-Mail: [email protected]

Dennis Akos
E-Mail: [email protected] HP: http://www.colorado.edu/aerospace/dennis-akos

• GNSS signal processing functions written in MATLAB
  • Code generations
  • Signal acquisition / tracking (data + pilot)
  • Decoding navigation messages
  • Pseudo-range mesurement generation
  • Calculation of position
• Support following signals
  • Beidou Phase III B2a
  • Beidou Phase III B1C
• Support RF binary file for post processing
  • All the SDRs have been tested with IF signals collected by the NUT4NT sampler of the Amungo Navigation company

./Doc Summary PowerPoint documents for each SDR receiver ./Common Common functions between differnt SDR receivers ./IF_Data_Set Folder containing the IF data sets to be processed and corresponding Metadata files ./BDS_B1C Beidou B1/B2 SDR receiver ./include Functions related to NAV data decoding and PVT computation
./init.m Strating function of the receiver
./initSettings.m Parameter configurations of the receiver
./postProcessing.m Top level processing function of the receiver
./acquisition.m Signal acquisition function
./tracking.m Signal tracking function ./postNavigation.m PVT computation ./BDS_B2a Beidou B1/B2 SDR receiver ./include Functions related to NAV data decoding and PVT computation
./init.m Strating function of the receiver
./initSettings.m Parameter configurations of the receiver
./postProcessing.m Top level processing function of the receiver
./acquisition.m Signal acquisition function
./tracking.m Signal tracking function ./postNavigation.m PVT computation

• All the SDRs have been tested on MATLAB R2016b and R2013b. Some functions of the MATLAB Communications System Toolbox are needed: -- Create Galois field array: gf() -- BCH decoder: bchdec() -- Detect errors in input data using CRC: comm.CRCDetector() -- Convert convolutional code polynomials to trellis description: poly2trellis() -- Convolutionally decode binary data using Viterbi algorithm: vitdec() -- Detect errors in input data using CRC: step()

• Step 1: Copy the IF data file into folder "IF_Data_Set";
• Step 2: Configue parameters related to IF data file in function "initSettings.m";
• Step 2: Start processing by runing function "init.m".

See the reference: Li, Y., Shivaramaiah, N.C. & Akos, D.M. Design and implementation of an open-source BDS-3 B1C/B2a SDR receiver. GPS Solut (2019) 23: 60. https://doi.org/10.1007/s10291-019-0853-z