A download data rate of 1Gbit/s has been achieved on fourth-generation (4G) mobile communication equipment in a lab experiment carried out by Japanese network operator NTT DoCoMo.

The 4G equipment used variable-spreading-factor spread orthogonal frequency division multiplexing (VSF-Spread OFDM) radio access method and multiple-input-multiple-output (MIMO) multiplexing with a signal detection algorithm in order to achieve the 1Gbit/s data transmission with 100MHz bandwidth in the downlink.

DoCoMo said it is currently conducting indoor tests with various radio conditions in preparation for future field tests to develop a 4G global standard in co-ordination with the ITU standards body. In Japan the telecom council is overseeing efforts to develop technologies for 4G commercial services by 2010.

DoCoMo is now looking at carrying out field experiments in early 2005.

By: DocMemory
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