A few days ago we reported how Japan’s NTT DoCoMo had developed the electronics necessary for mobile phone downloads at up to 200Mbit/s, so it’s only fitting that we should receive news that the base station technology has just been souped up to facilitate 900Mbit/s internet connections.

The latest development in the breakneck race towards gigabit-class internet connections on mobile phones is a prototype wireless base station from Fujitsu that relies, as expected, on MIMO technology to combine data streams.

3G on the way out

Fujitsu has been working with DoCoMo on the base stations since November 2006 as the giant carrier works to phase out its current 3G services in the near future.

tech.co.uk

Been waiting for the Nokia N95 with 3G? Well, the wait is now over. Nokia released the unlocked N95 into the wild today. If you’re lucky enough to have a Nokia store in your town, which means you live in NYC or Chicago. Get ready to pony up $700, though. Yikes.
The big deal is that it is optimized to latch onto our GSM 3G networks, so you can get your HSDPA or EDGE on stateside (it does the dance with both AT&T and T-Mobile.) It also has a few cosmetic changes—like the camera lens, as you can see. It’ll hit the states in September, and the price is an iPhone-esque $699 (mainly because it’ll only be sold unlocked, without carrier subsidies.)
crunchgear.com

NTT DoCoMo announced today that it has developed and successfully tested a trial large-scale-integration (LSI) chip incorporating advanced power-saving signal-processing technologies that enable the chip to work at a sufficiently low power consumption and to be made small enough to fit into forthcoming Super 3G handsets and beyond.

In the test, DoCoMo’s LSI achieved a transmission rate of 200Mbps with high precision over a high-speed wireless network, while power consumption did not exceed 0.1W thanks to DoCoMo’s proprietary signal-processing technology.
The LSI demodulates and separates MIMO (multiple-input multiple-output) -multiplexed OFDM (orthogonal frequency division multiplexing) signals transmitted in the 20MHz bandwidth from four antennas. Signal processing is based on MLD (maximum likelihood detection) technology that DoCoMo has originally developed for 4G wireless access.

Redundant circuits have been eliminated in the experimental chip, which was made with 65 nanometer processing.

DoCoMo will continue to develop Super 3G and 4G technologies in combination with its LSI technology, as well as cooperate in the establishment of related international standards.

* Super 3G will provide superfast downlinks in excess of 100Mbps. Super 3G is called Long Term Evolution (LTE) in the 3rd Generation Partnership Project (3GPP).
* DoCoMo’s proprietary signal-processing technology is based on MLD, the most accurate method available for separating MIMO-multiplexed signals. The MLD method separates MIMO-multiplexed signals by comparing the received signals and all possible signals to be transmitted to assess maximum likelihood. Although this guarantees accuracy it also requires very heavy computation, but DoCoMo’s signal-processing technology reduces computation load while maintaining accuracy.
* MIMO uses multiple antennas on the same frequency to create different data streams that are multiplexed spatially.
* OFDM transmits fast data series using multiple sub-carriers in parallel. The method is especially robust in areas with multipath propagation, such as urban environments.

phonemag.com