O'Reilly Network: When Is 54 Not Equal to 54? A Look at 802.11a, b, and g Throughput: "Now that the 802.11g standard has been finalized, comparisons with the other standards in the 802.11 family are inevitable. One conclusion that is frequently drawn is that 802.11g offers similar speeds to 802.11a. After all, both products are advertised as having a data rate of 54 Mbps.
This article develops a simple model for the maximum TCP throughput of 802.11 networks "