Fujitsu has developed ExpressCard device for Long Term Evolution (LTE) systems.This device is provided for Xi "crossy," an LTE service offered by NTT DOCOMO in Japan, and it achieves a downlink speed of up to about 75 Mb/s, which is more than ten times faster than the existing systems.In order to achieve a high data transmission rate with a device that is in the form of a card, state-of-the-art technologies have been applied such as current consumption reduction with thermal release technologies or breakthroughs in techniques for installing multiple antennas and LSIs onto a small and thin circuit board.This device uses an LSI developed as a communication platform which provides a fundamental communication function for future mobile devices for LTE systems.This paper also touches on several aspects of this baseband LSI and its future direction.
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