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NTT DoCoMo reports speeds of 1Gbps over wireless networks
Posted on 17-Dec-2004 20:50 | Filed under: News



NTT DoCoMo, Inc. has achieved high-speed packet transmission of up to 1 Gbps data rate in the downlink. The experiment is part of a laboratory testo on using fourth-generation (4G) mobile communication radio access equipments. The achievement was registered on 20 August but information was only now released.

The implemented 4G radio access equipments employ variable-spreading-factor spread orthogonal frequency division multiplexing (VSF-Spread OFDM) radio access method and multiple-input-multiple-output (MIMO) multiplexing technique using new signal detection algorithm in order to achieve 1Gbps data transmission with 100MHz bandwidth in the downlink.

DoCoMo achieved 100Mbps and 20Mbps data rate transmission in the downlink and uplink, respectively, in the outdoor environments with the moving speed of about 30 km/h in July 2003.

NTT DoCoMo is currently conducting indoor tests with various radio conditions as preparation for future field tests to develop a 4G global standard in coordination with the International Telecommunication Union Radiocommunication Sector. In Japan, the telecommunications council of the Ministry of Internal Affairs and Communications is overseeing efforts to develop technologies for 4G commercial services by 2010.

The announcement comes a few days after the British operator mmO2 released information of an experimental high speed wireless network based on HSDPA, to be deployed in the Isle of Man.





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