Fig.1 The prototype device of the world's first packet mode OFDM-based high-speed wireless LAN

The prototype device of the world's first packet mode OFDM-based high-speed wireless LAN

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In March 1999, NTT developed the prototype system of the world's first packet mode OFDM-based wireless LAN. The system realized 20 Mbit/s transmission data rate with a 802.11 compliant CSMA/CA media access control and a packet mode DQPSK-OFDM modulation.

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