ARCchart suggests how WiFi could break the 100 Mbps speed barrier:
MIMO (Multiple Input, Multiple Output) distributes packet traffic across multiple WLAN channels, boosting over-the-air throughput, while improved signal processing produces an improved range. Spatial multiplexing puts the data back together again, based on Orthogonal Frequency Division Multiplexing (OFDM), the same modulation technique used by 802.11a and g. The key element to the MIMO system however is multiple antennae and the performance of this system is scalable simply via the addition of more antennae. 100Mbps is easily achievable.
The Stanford-based developers of the MIMO system have set up Airgo Networks to develop silicon that uses this technology.
Intel is another major MIMO advocate. The company has acquired the MIMO system IP from another Stanford-based start-up, IOSpan, and at the recent Intel Developer Forum, Intel CTO, Pat Gelsinger stated Were going to drive MIMO into every platform we build. By implication this extends Intels intended use for MIMO to cellular, WiMAX or UWB platforms, not just Wi-Fi.