Bandspeed Announces Patent for Improved Wireless Crosstalk Cancellation and Interference Suppression
Posted: 11.30.04 -

Bandspeed, a leader in next-generation semiconductor solutions for wireless LAN access points, today announced that the company has been awarded a patent on improved wireless crosstalk cancellation and interference suppression technology. The patent (#6804313), generated by Dr. Stan Skafidas, co-founder and CTO of Bandspeed, describes new techniques which can improve 802.11n signal reliability and clarity, and it is applicable in MIMO (multiple-in, multiple-out) systems.

The new patented Bandspeed technology provides optimal filter implementation and includes Discrete Multi-Tone Technology (DMT) and Orthogonal Frequency Division Multiplexing (OFDM) – key technologies for developing future MIMO OFDM systems. Discrete Multi-Tone and Orthogonal Frequency Division Multiplexing are closely related modulation technologies that have superior performance in frequency selective and dispersive channels, compared to their single-carrier counterparts. These technologies also allow source separation to be performed on a tone-by-tone basis.

“The patent describes methods to perform source separation, which can be used to enhance standard source separation (MIMO) techniques that separate frequency overlapped streams by also exploiting diversity in time,” said Stan Skafidas, co-founder and CTO, Bandspeed. “This allows an extra degree of freedom to help provide a more reliable link or the ability to remove noise. Bandspeed’s strong signal processing background was instrumental in developing this technology to help improve 802.11 networks.”


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