Simulating Airband Am Radios
2 days ago
- The author is interested in realistic AM radio simulation for the BMS flight sim because the built-in voice chat lacks realistic interference and radio effects.
- Basic radio concepts explained: path loss, decibels, signal-to-noise ratio (SNR), amplitude modulation (AM), filtering, automatic gain control (AGC), squelch, and interference from beat frequencies.
- Digital implementation uses sampling, digital filters, IQ (in-phase/quadrature) representation, and baseband simulation to model multiple transmitters and noise.
- With only a few adjustable parameters (signal strengths, noise, AGC attack/decay, bandpass limits), the simulation produces realistic AM radio sounds as attested by pilots.