Wireless LAN Emissions Attenuation Technologies

Oberon proposes to use the results of the Phase I investigation to develop the methodology and technology to achieve EMCON emissions capability, substantially using current and emerging standards compliant wireless LAN devices. The method proposed is called the asymmetric power plan or APP. The APP presumes the largest contributor to EMCON emissions will be the multiplicity of client devices, which add logarithmically to the spatial power density at 1 nautical mile. To use the APP, an Active Access Point Diversity Antenna (AADA) needs to be developed. The AADA is envisioned as a device which can be added to any commercial, standards compliant access point. The desirable result of the APP and the AADA (reduced transmit power required) can be enhanced by using a multi-beam, multi-channel AADA, and a Multi-Input, Multi-output (MIMO) AADA. Additionally, software drivers and suitable client antennas must be developed to engage the low power level at the client device required by the APP. Finally, a software module is proposed to work within the emerging 802.11h standard for adaptive power control. This module is expected to be able to actively monitor and control emissions for EMCON compliance. In the Phase II option, Oberon proposes to test these technologies for EMCON compliance in a facility which would be representative of the end-use facility, using a multiplicity of APs and wireless client devices