Free interactive DSP and wireless calculators. Use them to check homework, validate simulations, or sanity-check a link budget, then jump into the matching tutorials on GaussianWaves.
Jump to: Link & capacity · Modulation · Waveform & FFT · OFDM & 5G · RF · Also useful
Link & capacity
- Shannon-Hartley capacity — channel capacity from bandwidth and SNR
- FSPL & link budget — free-space path loss and simple link budget
- Throughput & transfer time — data rate to transfer-time estimates
Modulation quality
- Eb/N0 ↔ Es/N0 ↔ SNR — modulation-aware conversions for BER sims
- BER vs Eb/N0 — theoretical BER for BPSK, QPSK, QAM
- EVM to SNR — convert error vector magnitude to SNR
- Diversity & multiplexing — SC/MRC BER & outage vs spatial multiplexing trade-off
Waveform & FFT
- Nyquist sampling & aliasing — waveform, spectrum replicas, phase trap at Fs = 2Fm
- Bandpass sampling — undersampling zones, alias map, noise folding, jitter
- RRC filter & bandwidth — root-raised cosine design with canvas plot
- FFT bin & resolution — bin frequencies and FFT frequency resolution
- FFT window functions — Hann / Hamming / Blackman / flat-top / Kaiser with ENBW and scalloping
- Gibbs phenomenon — Fourier overshoot lab (time series + FIR dual)
- Analytic signal & Hilbert — envelope, instantaneous phase and frequency
- Parseval’s theorem — time vs frequency energy check for the DFT
OFDM & 5G channels
- OFDM CP overhead — subcarriers and cyclic-prefix overhead
- Power delay profile — mean/RMS delay spread and coherence bandwidth
- 3GPP TR 38.901 TDL — tapped delay line models and coherence bandwidth
- 3GPP CDL / Doppler — CDL models, Doppler spread and coherence time
RF measurement
- Antenna factor & gain — convert between antenna factor and gain
Also useful
- IPv4 subnet & CIDR — general networking helper
Want the theory behind a calculator? Start with the learning paths on the homepage, or the tutorials on analytic signals, multipath, and MIMO. Books with full simulation code are on the products page.