Using the 802.11p standard, mobile vehicles can communicate each other.
IEEE 802.11p standard typically uses channels of 10 MHz bandwidth in the 5.9 GHz band (5.850-5.925 GHz).
And the transmission power is typically 20 mW.
In BPSK OFDM and 1/2 code rate of 802.11p standard documents, data rate of 802.11p is 3 Mbps. But in some overview, the 1 Mbps is ensured in 1 km transmission range.
Is the data rate is changed in the real environment?
If so, how was the data rate 1 Mbps calculated?