Sdr

*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

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))

*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

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))

*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

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))

*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

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))

*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

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))

*Released July 9, 2023*

Changes

- Added Farrow arbitrary resampling in `sdr.FarrowResampler`. ([1](https://github.com/mhostetter/sdr/pull/1))
- Added infinite impulse response (IIR) filters in `sdr.IIR`. ([3](https://github.com/mhostetter/sdr/pull/3))
- Added numerically-controlled oscillators (NCO) in `sdr.NCO`. ([4](https://github.com/mhostetter/sdr/pull/4))
- Added direct digital synthesizers (DDS) in `sdr.DDS`. ([4](https://github.com/mhostetter/sdr/pull/4))
- Added 2nd order, proportional-plus-integrator loop filters in `sdr.LoopFilter`. ([4](https://github.com/mhostetter/sdr/pull/4))
- Added closed-loop PLL analysis in `sdr.ClosedLoopPLL`. ([5](https://github.com/mhostetter/sdr/pull/5))

Contributors

- Matt Hostetter ([mhostetter](https://github.com/mhostetter))