v1.0.0: Channel Coding, OFDM & Information Theory: From Modulation Toolkit to Full Comms Stack

CommPy grows from a small modulation/channel-model toolkit into a comprehensive
communications-engineering library: forward error correction, a generic PHY layer,
OFDM, information theory, and queuing theory — all vectorized on NumPy/SciPy, with
an optional Numba fast path for the one inherently sequential hot loop (Viterbi
decoding).

No breaking changes to the public API. Three imports broken since an earlier
package rename are fixed as part of this release.

Highlights

Channel coding (FEC)

• Block codes: CRC (CRC-8/16-XMODEM/32 presets + custom CRCConfig),
  HammingCode, generic CyclicCode, BCHCode, ReedSolomonCode — error decoding
  via Berlekamp-Massey/Chien search/Forney, plus a separate erasures-only decoder
  correcting up to n-k erasures (double the error-only capability).
• Convolutional codes: Trellis, ConvolutionalEncoder, viterbi_decode
  (hard- and soft-decision, zero-tail termination, optional Numba JIT acceleration).
• Interleaving: BlockInterleaver, ConvolutionalInterleaver (Ramsey type-II).

Modulation & PHY

• A generic, Gray-coded Modulator engine — MPSKModulator, MQAMModulator,
  MPAMModulator — with vectorized hard-decision demodulation and soft-decision
  (LLR) output for feeding straight into Viterbi.
• Original per-scheme classes (OOK_Modulator, BPSK_Modulator, etc.) kept for
  backward compatibility; the QPSK_Modulator list-vs-array bug is fixed.
• raised_cosine_filter / root_raised_cosine_filter pulse shaping, drop-in
  compatible with IQWaveform.
• zf_equalizer / mmse_equalizer linear FIR channel equalizers.
• gardner_timing_error, estimate_cfo_mth_power, costas_loop_bpsk
  synchronization primitives.

OFDM

• OFDMModulator / OFDMDemodulator with configurable active subcarriers and
  cyclic prefix.
• papr, papr_db, papr_ccdf for peak-to-average power ratio analysis.

Information theory

• binary_entropy, mutual_information, channel_capacity_bsc,
  channel_capacity_awgn, channel_capacity_dmc (Blahut-Arimoto).
• huffman_codes/huffman_encode/huffman_decode and
  arithmetic_encode/arithmetic_decode (exact-rational arithmetic coding).
• rate_distortion_binary (closed-form binary rate-distortion function).

Networking

• MM1Queue, MM1KQueue, MMcQueue — closed-form M/M/1-family queuing models.

Galois fields

• PrimeField (GF(p)) generalized onto a new FiniteField base; new GF2m
  (GF(2^m)) via vectorized log/antilog tables — the algebraic foundation for
  BCH/Reed-Solomon.

Fixed

• Three stale CommPy → commpy imports (from an earlier package rename) that
  broke PrimeField, the test suite, and IQWaveform's demo block.
• QPSK_Modulator's list-vs-array equality bug (silently produced wrong/empty
  output for ndarray/tuple input).
• commpy.__version__ now actually exists (previously documented but absent).

Infrastructure

• CI now runs ruff, mypy --strict, and pytest on every push/PR across
  Python 3.10–3.12, including a dedicated job for the Numba-absent fallback path.
• scipy is now a hard dependency; numba is an optional commpy[fast] extra.
• Test suite grew from 3 tests to 324, including exhaustive brute-force
  cross-validation for BCH/Reed-Solomon decoding and Viterbi-vs-maximum-likelihood
  checks.
• New examples/ directory: 8 runnable, tested scripts, including a full-chain
  capstone (Huffman → convolutional code → BPSK → multipath channel → ZF
  equalization → soft-decision Viterbi → decompression).

Stats

• Source: ~760 → ~3,750 lines
• Tests: 3 → 324 (all passing)
• Public API surface: 12 → ~65 exported names

Full changelog: see docs/CHANGELOG.md