News
Issue #2003 - 25 (September 2003)
(Updated Sept. 12, 2003)

TECHNOLOGY

COMSIS MultiDiverse Technology May Speed Up Wi-Fi Further

Paris, France, -- COMSIS® announced recently MultiDiverseTM V1.0 technology, a new additive transmission methodology applicable to any wireless transmission standard which significantly improves the performance of the transmission systems. This technology is a disruptive approach to multi-path wireless transmissions using a patented combination of multiple antennas and space/time diversity. Although MultiDiverseTM V1.0 technology is applicable to many transmission systems, for the time being, it has been implemented only to the IEEE 802.11a standard.

All transmission systems currently in use like 802.11a, b, and g are implementing several strategies in order to protect the transmission channels against interferences. These strategies are all trying to dynamically select the best path and eliminate all other paths. On the contrary, MultiDiverseTM V1.0 technology is building upon the statistical properties of multiple paths to successfully decode all the information transmitted by every path. This way, the efficiency of the transmission is dramatically increased, allowing the channel capacity to be increased by a factor of up to 64. In fact, there is no theoretical limit to the number of antennas to be used and therefore, there is no theoretical limit to the improvement factor which can be achieved over a standard transmission system.

Current WLAN IEEE standards provide adequate data rates and area coverage for usual Internet connections like email and Web browsing. Such applications are possible as long as the number of clients connected to the same access point or hot spot is limited and the level of interference is moderate. The current market success of Wi-Fi systems has already demonstrated the limitations inherent to the current standards. For reliable communications in crowded places with a high level of interference or for high data rate transmissions like home video distribution, the current standards are totally unable to provide the data rate, area coverage and QoS that are mandatory. MultiDiverseTM V1.0 technology provides enough data rate, area coverage and QoS to make such applications possible. The superior performances of COMSIS® ' technology reduces the cost and complexity of WLAN infrastructure and enables new high data rate transmission applications.

These improvements have also made possible reliable transmissions at the same data rate and zone coverage as the current standards but with only one tenth of the power consumption opening a whole new category of applications in the ultra portable devices.

COMSIS is a Research and Development and Design House Company in the field of Telecommunication Systems. Established in Paris 7 years ago, COMSIS has already developed several Telecom systems for major international Telecom and Semiconductor companies and the French Ministry of Defense.

COMSIS and MultiDiverseTM are trademarks or registered trademarks of COMSIS in France and other countries.

For more information: http://www.comsis.fr

MobileInfo Comments and Advisory: Success of Wi-Fi technology has spurred a lot of research into extending the reach of Wi-Fi network coverage as well as increase the speed. Major problem is to negate the effect of interference from other signals in the same band. In view of this, research by COMSIS is very desirable. 

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