sdr¶

The sdr library is a Python 3 package for software-defined radio (SDR).

The goal of sdr is to provide tools to design, analyze, build, and test digital communication systems in Python. The library relies on and is designed to be interoperable with NumPy, SciPy, and Matplotlib. Performance is also very important. So, where possible, Numba is used to accelerate computationally-intensive functions.

Additionally, the library aims to replicate relevant functionality from Matlab’s Communications and DSP Toolboxes.

We are progressively adding functionality to the library. If there is something you’d like to see included in sdr, please open an issue on GitHub.

Installation¶

The latest version of sdr can be installed from PyPI using pip.

python3 -m pip install sdr

Features¶

• Digital signal processing:

  • Filtering: sdr.FIR, sdr.FIRInterpolator, sdr.IIR

  • Resampling: sdr.FarrowResampler

  • Signal manipulation: sdr.mix(), sdr.to_complex_bb(), sdr.to_real_pb()

• Sequences: sdr.barker(), sdr.zadoff_chu()

• Modulation:

  • Classes: sdr.PSK

  • Pulse shapes: sdr.raised_cosine(), sdr.root_raised_cosine(), sdr.gaussian()

  • Symbol mapping: sdr.binary_code(), sdr.gray_code()

  • Symbol encoding: sdr.diff_encode(), sdr.diff_decode()

• Synchronization: sdr.NCO, sdr.DDS, sdr.LoopFilter, sdr.ClosedLoopPLL

• Measurement:

  • Energy: sdr.energy()

  • Power: sdr.peak_power(), sdr.average_power(), sdr.papr()

  • Voltage: sdr.peak_voltage(), sdr.rms_voltage(), sdr.crest_factor()

  • Modulation: sdr.ErrorRate, sdr.evm()

• Conversions:

  • From \(E_b/N_0\): sdr.ebn0_to_esn0(), sdr.ebn0_to_snr()

  • From \(E_s/N_0\): sdr.esn0_to_ebn0(), sdr.esn0_to_snr()

  • From \(S/N\): sdr.snr_to_ebn0(), sdr.snr_to_esn0()

• Simulation:

  • Channel models: sdr.bec(), sdr.bsc(), sdr.dmc()

  • Signal impairments: sdr.awgn(), sdr.frequency_offset(), sdr.sample_rate_offset(), sdr.iq_imbalance()

• Link budgets:

  • Channel capacity: sdr.awgn_capacity(), sdr.bec_capacity(), sdr.bsc_capacity()

  • Path losses: sdr.fspl()

  • Antennas: sdr.parabolic_antenna()

• Probability: sdr.Q(), sdr.Qinv()

• Data manipulation: sdr.pack(), sdr.unpack(), sdr.hexdump()

• Plotting:

  • Time-domain: sdr.plot.time_domain()

  • Spectral estimation: sdr.plot.periodogram(), sdr.plot.spectrogram()

  • Modulation: sdr.plot.ber(), sdr.plot.ser(), sdr.plot.constellation(), sdr.plot.symbol_map()

  • Filters: sdr.plot.impulse_response(), sdr.plot.step_response(), sdr.plot.frequency_response(), sdr.plot.phase_response(), sdr.plot.phase_delay(), sdr.plot.group_delay(), sdr.plot.zeros_poles(), sdr.plot.filter()