According to JCN Network, NTT DoCoMo announced December 17 that it succeeded in achieving 1Gbps in downlink packet data transmission in a laboratory experiment using forth-generation (4G) mobile communication radio access equipment on August 20, 2004.
The company employed two wireless access techniques, variable-spreading-factor spread orthogonal frequency division multiplexing (VSF-Spread OFDM) and multple-input-multple-output (MIMO) multiplexing, in the latest test.
The company also used its proprietary signal separation technique to enable data transmission at 1Gbps in realtime using a bandwidth of 100MHz in a area with low radio signal receptivity.
NTT DoCoMo aims to develop a 4G global standard in coordination with the International Telecommunication Union Radiocommunication Sector.
Explore further: NTT DoCoMo Achieves World's First 2.5Gbps Packet Transmission in 4G Field Experiment