v-goncharenko / freespace

Implementation of signal propagation in free space

Free Space

Implements signal proragation in free space. Inspiered by Matlab's phased.FreeSpace and tested to have the same results. Accounts in calculations:

• time delay
• doppler effect
• signal loss

Assumptions

• Propagation speed > origin velocity
• Propagation speed > destination velocity
• Initial distance >> relative velocity * broadcast time

Test suite

generateTests.m - код на матлабе для генерации тестов

generateTests.py - generates a set of tests with different parameters (random or predefined), saves it in .mat file (and maybe .pickle file for Python) Outputs: * operating_frequency * sample_rate * two_way_propagation * signal * origin_pos * dest_pos * origin_vel * dest_vel

testMatlab.py - runs existing tests (reads form .mat files) in Matlab by Matlab API for Python and saves results (to .mat or .picle). Internally runs matlab function. Outputs: * y

testFreeSpace.py - runs existing tests in FreeSpace and saves results (or compares with Matlab's?)

compareTests.py - checks if Matlab's and Python's results are equal

Enviroment

Project uses Python 3.5.4 (it pointed in .python-version file) Python requirements for using this code listed in requirements.txt, also development requirements listed in dev-requirements.txt

Matlab version is R2016b (9.1), 64-bit(glnxa64)

Code style

We use Google Python Style Guide except line length set to 120.