From Telecom.com

The operator said the 4G equipment employs variable-spreading-factor spread OFDM radio access and multiple-input-multiple-output multiplexing techniques, achieving 1Gbps data transmission with 100MHz bandwidth in the downlink. DoCoMo said it achieved 100Mbps and 20Mbps data rate transmission in the downlink and uplink respectively in outdoor tests moving at speeds of about 30km/h.