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tactical-radio

military tactical radio

L3Harris Falcon, Thales PR4G, Rohde & Schwarz SOVERON

SystemTechniques · 20Primitives · 68 tactical-radio Deterministic simulation testingdistributed · medium: Run the whole system in one thread under a seeded scheduler with simulated network, disk and clock, so every failure replays from its seed.›Primary-backup replicationdistributed · medium: One node orders all writes and ships them to standbys; the acknowledgement rule (none, one, all) sets what a crash loses, and an external arbiter decides who takes over.›Jitter buffermedia · medium: A receiver-side buffer holds packets just long enough, a delay tracked from recent arrivals, to reorder them and hand out media at a steady rate.›Coverage-guided fuzzingsecurity · medium: Mutate inputs, run an instrumented target, and keep any input that reaches a new code edge; feedback turns blind guessing into incremental search.›Key rotationsecurity · medium: Rotating keys without downtime: key ids, overlap windows, re-wrapping, JWKS publication, revocationChannel estimationsignal-processing · medium: Pilot-based LS/MMSE channel estimation and interpolation across time and frequencyFrequency hopping spread spectrumsignal-processing · medium: Hop carrier frequency over a pseudorandom sequence shared by key and time so jamming and interception cover only a few hopsOfdm modulationsignal-processing · low: OFDM via IFFT/FFT, cyclic prefix, subcarrier mapping and PAPR handlingGraceful drainingsystems · low: On a termination signal, stop taking new work, finish in-flight work until a deadline, tell clients to reconnect elsewhere, then exit; clients resume from a token.›Linear predictive coding (LPC)media · low: Predict each sample from the previous p; code only the small prediction error plus p coefficients. Core of FLAC, speech codecs and the Opus SILK layer.›AEAD (AES-GCM, ChaCha20-Poly1305)security · low: Authenticated encryption that encrypts and detects tampering in one call; the only kind of symmetric encryption you should use.›Aes key wrapsecurity · low: AES Key Wrap (RFC 3394/5649) and AES-GCM-SIV for deterministic, authenticated wrapping of key materialHdr histogramdata-structures · low: Log-linear bucketed histograms with bounded relative error for latency percentilesProcess supervisionhardware-os · low: A parent process starts services, reaps their exits and restarts them under a delay and burst-limit policy, then stops them with SIGTERM before SIGKILL.›IP multicastnetworking · low: Send each datagram once to a class D group address; the network copies it to every joined receiver, and sequence numbers let receivers find loss.›Mutual TLSsecurity · low: TLS where the client also proves a certificate key, so every connection carries a verified, rotatable machine identity.›Secure memory zeroizationsecurity · low: Keep secrets in one locked, fixed-size, non-copyable region, erase them with writes the compiler must keep, and exclude them from dumps and swap.›Adaptive equalizationsignal-processing · low: LMS/RLS equalizer filters that invert channel distortion from training or decisionsAloha random accesssignal-processing · low: Pure/slotted ALOHA random access MAC: collisions, throughput limits, backoffConvolutional codes and the Viterbi…signal-processing · low: Streaming error-correcting code: each output bit is a parity of the last K input bits; the Viterbi decoder finds the most likely path through a 2^(K-1)-state trellis.›Phase-locked loop (digital)signal-processing · low: Feedback loop that locks a local oscillator to the phase and frequency of an input tone; the core of carrier recovery, clock recovery and GNSS tracking.›Reed-Solomon codessignal-processing · low: Byte-oriented MDS code: n-k parity symbols correct (n-k)/2 unknown symbol errors or n-k known erasures; the workhorse for bursts, QR codes, discs and storage.›Symbol timing recoverysignal-processing · low: Gardner/Mueller-Muller timing error detectors with interpolators for symbol synchronization+ 13 more techniques+ 52 more primitives

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