v0.0

v0.0.24

Released September 5, 2024

Changes

  • Added support for NumPy 2.1.

Contributors

v0.0.23

Released July 28, 2024

Changes

  • Added calculation of filter noise bandwidth in sdr.FIR.noise_bandwidth() and sdr.IIR.noise_bandwidth().

  • Added calculation of threshold level above the noise power in sdr.threshold_factor().

  • Added numerical calculation of the PDF of the sum and product of random variables in sdr.sum_distribution(), sdr.sum_distributions(), and sdr.multiply_distributions().

  • Renamed sdr.design_frac_delay_fir() to sdr.fractional_delay_fir().

  • Renamed sdr.design_lowpass_fir() to sdr.lowpass_fir().

  • Renamed sdr.design_highpass_fir() to sdr.highpass_fir().

  • Renamed sdr.design_bandpass_fir() to sdr.bandpass_fir().

  • Renamed sdr.design_bandstop_fir() to sdr.bandstop_fir().

  • Renamed sdr.design_multirate_fir() to sdr.multirate_fir().

  • Allowed use of SciPy window definition using scipy.signal.windows.get_window() for all filter design and plotting functions.

Contributors

v0.0.22

Released July 13, 2024

Changes

  • Added support for NumPy v2.

  • Increased required galois version to v0.4.1.

  • Added calculation of instantaneous power in sdr.power().

  • Refactored sdr.binary_code() and sdr.gray_code() to accept length, not degree.

  • Reworked argument verification of entire public API.

  • Improved nuisance warning suppression.

  • Improved documentation.

  • Fixed minor bugs.

Contributors

v0.0.21

Released June 15, 2024

Changes

  • Added Gold codes in sdr.gold_code().

  • Added calculation of primitive polynomials that generate preferred pair \(m\)-sequences in sdr.preferred_pairs().

  • Added check if two primitive polynomials form a preferred pair in sdr.is_preferred_pair().

  • Added plot of the discrete Fourier transform (DFT) in sdr.plot.dft().

  • Added plot of the discrete-time Fourier transform (DTFT) in sdr.plot.dtft().

  • Added plot of periodic and non-periodic auto- and cross-correlations (PACF, ACF, PCCF, and CCF) in sdr.plot.correlation().

  • Added general-purpose stem plot, styled like MATLAB, in sdr.plot.stem().

  • Added plot of Shannon’s limit on \(E_b/N_0\) in sdr.plot.shannon_limit_ebn0().

  • Added support for python -OO optimization.

  • Increased required galois version to v0.3.9.

Contributors

v0.0.20

Released June 9, 2024

Changes

  • Removed sdr.percent(), sdr.ppm(), and sdr.ppb().

  • Added Shnidman’s minimum required SNR approximation in sdr.shnidman().

  • Added Shannon’s limit on \(E_b/N_0\) over the AWGN channel in sdr.shannon_limit_ebn0().

  • Added Shannon’s limit on \(S/N\) over the AWGN channel in sdr.shannon_limit_snr().

  • Added axis keyword argument ax to each sdr.plot function.

  • Modified sdr.sample_rate_offset() and sdr.frequency_offset() APIs to use offset and not ppm.

  • Renamed sdr.fspl() to sdr.free_space_path_loss().

Contributors

v0.0.19

Released May 27, 2024

Changes

  • Added calculation of Cramér-Rao lower bounds (CRLBs) for TOA, TDOA, FOA, and FDOA in sdr.toa_crlb(), sdr.tdoa_crlb(), sdr.foa_crlb(), and sdr.fdoa_crlb().

  • Added calculation of the effective SNR of the product of two signals in sdr.composite_snr().

  • Added calculation of RMS integration time in sdr.rms_integration_time().

  • Added calculation of RMS bandwidth in sdr.rms_bandwidth().

  • Added calculation of Shannon’s capacity for the binary-input additive white Gaussian noise (BI-AWGN) channel in sdr.biawgn_capacity().

  • Renamed sdr.to_real_pb() to sdr.to_real_passband().

  • Renamed sdr.to_complex_bb() to sdr.to_complex_baseband().

Contributors

v0.0.18

Released May 12, 2024

Changes

  • Added support for coherent integration n_c and non-coherent integration n_nc to detection functions sdr.h0(), sdr.h1(), sdr.p_d(), sdr.p_fa(), and sdr.threshold().

  • Added support for real/complex signals and linear/square-law detectors to sdr.non_coherent_gain().

  • Added calculation of minimum required SNR to achieve specified detection performance in sdr.min_snr().

  • Added Peebles’s approximation of non-coherent gain using a square-law detector in sdr.peebles().

  • Renamed sdr.h0_theory() to sdr.h0().

  • Renamed sdr.h1_theory() to sdr.h1().

Contributors

v0.0.17

Released March 10, 2024

Changes

  • Added theoretical detection threshold calculation in sdr.threshold().

  • Added theoretical probability of detection calculation in sdr.p_d().

  • Added theoretical probability of false alarm calculation in sdr.p_fa().

  • Added test statistic distributions in sdr.h0_theory() and sdr.h1_theory().

  • Added support for coherent, linear, and square-law detectors.

  • Added support for detection of real and complex signals.

  • Added plot helper for detection distributions in sdr.plot.detection_pdfs().

Contributors

v0.0.16

Released March 3, 2024

Changes

  • Removed Python 3.7 support.

  • Added Kasami codes in sdr.kasami_code().

  • Added coherent integration gain in sdr.coherent_gain().

  • Added coherent gain loss in sdr.coherent_gain_loss().

  • Added maximum integration time for coherent integration in sdr.max_integration_time().

  • Added maximum frequency offset for coherent integration in sdr.max_frequency_offset().

  • Added non-coherent integration gain in sdr.non_coherent_gain().

Contributors

v0.0.15

Released February 4, 2024

Changes

  • Fixed bug in support for Python 3.12.

  • Made characteristic polynomial the default input for LFSRs, additive scramblers, and m-sequences.

Contributors

v0.0.14

Released February 2, 2024

Changes

  • Added support for Python 3.12.

  • Added support for NumPy 1.26.

  • Pinned galois to v0.3.8.

Contributors

v0.0.13

Released January 28, 2024

Changes

  • Added Fibonacci LFSRs in sdr.FLFSR.

  • Added Galois LFSRs in sdr.GLFSR.

  • Added maximum-length sequences in sdr.m_sequence().

  • Added additive scrambling in sdr.AdditiveScrambler.

  • Added interleavers in sdr.Interleaver and sdr.BlockInterleaver.

  • Added generic continuous-phase modulation in sdr.CPM.

  • Added channel models sdr.BinarySymmetricChannel, sdr.BinaryErasureChannel, and sdr.DiscreteMemorylessChannel.

  • Added the Berlekamp-Massey LFSR synthesis algorithm in sdr.berlekamp_massey().

  • Added persistence plots in sdr.plot.raster(), sdr.plot.eye(), and sdr.plot.constellation().

  • Added galois dependency.

  • Renamed sdr.barker() to sdr.barker_code().

  • Renamed sdr.hadamard() to sdr.hadamard_code().

  • Renamed sdr.walsh() to sdr.walsh_code().

  • Renamed sdr.zadoff_chu() to sdr.zadoff_chu_sequence().

Contributors

v0.0.12

Released January 7, 2024

Changes

  • Added automatic gain control in sdr.AGC.

  • Added fractional delay FIR filters in sdr.FractionalDelay.

  • Added generic polyphase FIR filters in sdr.PolyphaseFIR.

  • Added polyphase FIR channelizers in sdr.Channelizer.

  • Added linear, quadratic, and quartic polynomials to sdr.FarrowResampler.

  • Added FarrowResampler.flush() method.

  • Added offset keyword argument sdr.plot.impulse_response().

  • Added Numba dependency with minimum version 0.55.

  • Modified design_multirate_taps() and polyphase_decompose() APIs.

  • Enabled Kaiser-method prototype filter design using polyphase_order and atten keyword arguments to polyphase FIR classes.

  • Standardized interpolation, decimation, rate, and delay properties of polyphase FIR classes.

  • Supported span of 1 for all pulse shape functions.

  • Fixed bug in phase of first NCO output sample.

Contributors

v0.0.11

Released December 14, 2023

Changes

  • Added heuristic phase error detector in sdr.PED.

  • Added maximum-likelihood PED in sdr.MLPED.

  • Added Hadamard codes in sdr.hadamard().

  • Added Walsh codes in sdr.walsh().

  • Added moving average FIR filter in sdr.MovingAverager.

  • Added leaky integrating IIR filter in sdr.LeakyIntegrator.

  • Added FIR.group_delay() method.

  • Added FIR.phase_delay() method.

  • Reworked {FIR|IIR}.frequency_response() and removed {FIR|IIR}.frequency_response_log().

  • Added support for explicit time axes in sdr.plot.time_domain(t, x).

  • Added y_axis option to frequency-domain plots.

  • Added x_axis="auto" option to frequency-domain filter plots.

  • Added NCO output formats of sine, cosine, complex exponential, or accumulated phase.

  • Improved bandwidth of discrete-time differentiator in sdr.Differentiator.

  • Added backward, trapezoidal, and forward discrete-time integration methods in sdr.Integrator.

  • Updated Jupyter notebook examples.

Contributors

v0.0.10

Released November 19, 2023

Changes

  • Added window-based FIR filter design in sdr.design_lowpass_fir(), sdr.design_highpass_fir(), sdr.design_bandpass_fir(), and sdr.design_bandstop_fir().

  • Added fractional delay FIR filter design in sdr.design_frac_delay_fir().

  • Added ability to measure Euclidean distance in sdr.euclidean().

  • Added ability to measure Hamming distance in sdr.hamming().

  • Renamed sdr.multirate_taps() to sdr.design_multirate_fir().

  • Renamed sdr.polyphase_matrix() to sdr.polyphase_decompose().

Contributors

v0.0.9

Released November 12, 2023

Changes

  • Added polyphase rational resampling in sdr.Resampler.

  • Added discrete-time FIR differentiating filters in sdr.Differentiator.

  • Added discrete-time IIR integrating filters in sdr.Integrator.

  • Added sdr.percent(), sdr.ppm(), and sdr.ppb().

  • Moved sdr.DDS functionality into sdr.NCO. Removed sdr.DDS.

  • Added ability to seed the channel models.

  • Added option to compute measurements along a specified axis.

  • Added option to return measurements in decibels.

  • Replaced pylint with ruff.

  • Replaced black with ruff.

  • Improved type annotations.

Contributors

v0.0.8

Released September 4, 2023

Changes

  • Added minimum-shift keying (MSK) in sdr.MSK.

  • Added pulse shape customization to linear modulations.

  • Added theoretic detection performance of a matched filter in sdr.ReplicaCorrelator and an energy detector in sdr.EnergyDetector.

  • Added Albersheim’s minimum required SNR approximation in sdr.albersheim().

  • Added plotting of receiver operating characteristic (ROC) curves in sdr.plot.roc().

  • Added plotting of probability of detection curves in sdr.plot.p_d().

  • Added plotting of phase trees of continuous-phase modulation (CPM) in sdr.plot.phase_tree().

  • Added sensible time and frequency units to plots.

Contributors

v0.0.7

Released August 27, 2023

Changes

  • Added generic linear modulation schemes in sdr.LinearModulation.

  • Added \(\pi/M\) PSK modulation in sdr.PiMPSK.

  • Added offset QPSK modulation in sdr.OQPSK.

  • Added rectangular pulse shapes in sdr.rectangular().

  • Added half-sine pulse shapes in sdr.half_sine().

  • Added pulse shaping in linear modulations. Now map_symbols() and decide_symbols() operate on 1 sample per symbol and modulate() and demodulate() operate on multiple samples per symbol.

Contributors

v0.0.6

Released August 20, 2023

Changes

  • Added raster plots in sdr.plot.raster().

  • Added eye diagrams in sdr.plot.eye().

  • Added upsampling (without anti-aliasing filtering) in sdr.upsample().

  • Added downsampling (without anti-aliasing filtering) in sdr.downsample().

  • Added wavelength calculation in sdr.wavelength().

  • Supported real sinusoid mixing.

  • Supported returning measurements in dB.

Contributors

v0.0.5

Released August 13, 2023

Changes

  • Added polyphase FIR decimator in sdr.Decimator().

  • Added multirate FIR filter design in sdr.multirate_taps().

  • Added polyphase decomposition in sdr.polyphase_matrix().

  • Added linear to decibel conversion in sdr.db().

  • Added decibel to linear conversion in sdr.linear().

  • Added linear and zero-order hold polyphase FIR interpolators.

  • Added a state property to FIR filters.

  • Added a flush() method to FIR filters.

  • Added support for passing filter objects into filter plotting functions.

  • Added ability to center or offset a time-domain plot.

  • Improved the string representation of classes.

  • Renamed sdr.plot.frequency_response() to sdr.plot.magnitude_response().

  • Removed superfluous methods like FIR.filter() and replaced with FIR.__call__().

Contributors

v0.0.4

Released August 6, 2023

Changes

  • Added error vector magnitude measurement in sdr.evm().

  • Added complex mixing (frequency translation) in sdr.mix().

  • Added real passband to complex baseband conversion in sdr.to_complex_bb().

  • Added complex baseband to real passband conversion in sdr.to_real_pb().

  • Added binary and bipolar Barker sequences in sdr.barker().

  • Added complex-valued Zadoff-Chu sequences in sdr.zadoff_chu().

  • Added theoretical BER/SER for DE-PSK.

  • Fixed theoretical BER/SER for PSK.

Contributors

v0.0.3

Released July 30, 2023

Changes

  • Added PSK modulation in sdr.PSK.

  • Added symbol mapping: sdr.binary_code(), sdr.gray_code().

  • Added differential codes: sdr.diff_encode(), sdr.diff_decode().

  • Added a FIR interpolating filter in sdr.FIRInterpolator.

  • Added error rate measurement in sdr.ErrorRate.

  • Added signal measurement functions: sdr.energy(), sdr.peak_power(), sdr.average_power(), sdr.papr(), sdr.peak_voltage(), sdr.rms_voltage(), sdr.crest_factor().

  • Added channel models: sdr.bec(), sdr.bsc(), sdr.dmc().

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

  • Added probability functions: sdr.Q(), sdr.Qinv().

  • Added link budget functions: sdr.fpsl(), sdr.parabolic_antenna().

  • Added channel capacity functions: sdr.awgn_capacity(), sdr.bec_capacity(), sdr.bsc_capacity().

  • Added SNR conversion functions: sdr.ebn0_to_esn0(), sdr.ebn0_to_snr(), sdr.esn0_to_ebn0(), sdr.esn0_to_snr(), sdr.snr_to_ebn0(), sdr.snr_to_esn0().

  • Added plotting functions for modulation: sdr.plot.ber(), sdr.plot.ser(), sdr.plot.constellation(), sdr.plot.symbol_map().

  • Added more filter plotting functions: sdr.plot.phase_response(), sdr.plot.phase_delay().

Contributors

v0.0.2

Released July 16, 2023

Changes

  • Added finite impulse response (FIR) filters in sdr.FIR.

  • Added pulse shapes: sdr.raised_cosine(), sdr.root_raised_cosine(), sdr.gaussian().

  • Added plotting helper functions in sdr.plot:

    • sdr.plot.time_domain()

    • sdr.plot.periodogram(), sdr.plot.spectrogram()

    • sdr.plot.filter(), sdr.plot.frequency_response, sdr.plot.group_delay(), sdr.plot.impulse_response(), sdr.plot.step_response(), sdr.plot.zeros_poles()

  • Added measurement functions: sdr.papr(), sdr.crest_factor().

  • Added bit packing and unpacking functions: sdr.pack(), sdr.unpack().

  • Added hexdump helper function in sdr.hexdump().

  • Improved type annotations.

Contributors

v0.0.1

Released July 9, 2023

Changes

  • Added Farrow arbitrary resampling in sdr.FarrowResampler. (#1)

  • Added infinite impulse response (IIR) filters in sdr.IIR. (#3)

  • Added numerically controlled oscillators (NCO) in sdr.NCO. (#4)

  • Added direct digital synthesizers (DDS) in sdr.DDS. (#4)

  • Added 2nd order, proportional-plus-integrator loop filters in sdr.LoopFilter. (#4)

  • Added closed-loop PLL analysis in sdr.ClosedLoopPLL. (#5)

Contributors

Last update: Sep 06, 2024