Add release notes for v0.0.3

docs/release-notes/v0.0.md

@@ -4,6 +4,31 @@ tocdepth: 2
 
 # v0.0
 
+## 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
+
+- Matt Hostetter ([@mhostetter](https://github.com/mhostetter))
+
 ## v0.0.2
 
 *Released July 16, 2023*