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Two large industry " Pre-N " groups, the TGnSync Group and the World-Wide Spectrum Efficiency (WWiSE), have formed, and each espouses a different approach to achieving next-generation wireless technologies. WWiSE won the support of Texas Instruments , Broadcom , Conexant , STMicro, Airgo Networks and Bermai, and later Motorola . Leading the WWiSE group is Airgo Networks, which is headed by former Stanford researcher Greg Raleigh. Airgo is a chief proponent of MIMO (multiple in, multiple out) technology using multiple radios and multiple antennas. Its current chipset can currently be found in access points from Belkin and Linksys .