Link Budget Calculator

Kalkulasi daya sinyal end-to-end komunikasi satelit

Parameter Input

Formula: Pr = Pt + Gt − Lfs − Latm + Gr
S-band: 2–4 GHz | X-band: 8–12 GHz
Orbital altitude untuk zenith pass
Received Power Pr
—
dBW
C/N₀
—
dB-Hz
Link Margin
—
dB

Status Link

BELUM DIHITUNG
Free Space Loss Lfs
—
Eb/N₀
—
Noise Floor
—

Penjelasan Rumus

Lfs = 20·log₁₀(4π·d·f/c)     [Free Space Path Loss]
  d = jarak (m), f = frekuensi (Hz), c = 3×10⁸ m/s

Pr  = Pt + Gt − Lfs − Latm + Gr   [Received Power, dBW]

N₀  = −228.6 + 10·log₁₀(T)       [Noise Spectral Density, dBW/Hz]
  k = 1.38×10⁻²³ J/K (Boltzmann)

C/N₀ = Pr − N₀                    [Carrier-to-Noise density, dB-Hz]

Eb/N₀ = C/N₀ − 10·log₁₀(Rb)      [Energy per bit, dB]
  Rb = data rate (bps)

Link Margin = Eb/N₀ − min_required (≥3 dB untuk BPSK)