The Maximum Data Rate on Radio Channel

In order to implement reliable data transmission on radio channel, we must gurantee that link margin $M \geq 0$ . Here, we assume M = P_r,o - P_r,n = 0 . That is

P_t + G_t + G_r - L₀ - S / N - W - F + 204 = 0 (5)

Therefore,

W = P_t + G_t + G_r - L₀ - S / N - F + 204 (6)

Given the conditions:

d = 10   km (7)

$$1 ~ Watt \left ( 0 ~ dB \right )$$ P_t = (8)

G_t = G_r = 0   dB (9)

S / N = 10   dB (10)

F = 2   dB (11)

f_c = 900   MHz (12)