Table 5.

Parameter Specifications of IEEE 802.11a and IEEE 802.11p.

Parameters	IEEE 802.11a	IEEE 802.11p
Data Transmission Rate	Upto 54 Mbps	Upto 27 Mbps
Channel Bandwidth	20 MHz	10 MHz
Guard Time	0.8 µs	1.6 µs
Subcarrier Spacing	0.3125 MHz	0.15625 MHz
Orthogonal Frequency Division Multiplexing Symbol Duration	4 µs	8 µs
Preamble Duration	16 µs	32 µs
Subcarrier Count	52	52
Coding Rate	Upto ¾	Upto ¾
Basic Modulations Used	Binary Phase Shit Keying (BPSK), Quadrature Phase Shift Keying (QPSK)	Binary Phase Shit Keying (BPSK), Quadrature Phase Shift Keying (QPSK)
Quadrature Amplitude Modulation (QAM)	16QAM, 64QAM	16QAM, 64QAM