Motorola claims wireless spread-spectrum breakthrough

Researchers in Motorola Labs announced on Tuesday that their Orthogonal Frequency Division Multiplexing (OFDM) technology can transmit data at speeds of up to 300Mbps

Working in the Chicago region, Motorola conducted a series of demonstrations using OFDM on a 20MHz channel with multiple-antenna handheld devices. This work, the company says, has proven that a 20MHz mobile OFDM channel can support peak uncoded channel data rates of up to 300Mbps.

During the tests, applications such as videoconferencing and high-quality streaming video worked effectively on mobile gadgets being operated in vehicles travelling at up to 60 miles per hour.

OFDM is a radio spread-spectrum technology that transmits data simultaneously at a number of different frequencies. This makes it an efficient and quick way to send data, and also results in less interference and distortion.

Motorola is now planning to play a major role in pushing OFDM as a broadband wireless standard.

"The promise of affordable, available mobile broadband is driving Motorola's vision of seamless mobility," said Padmasree Warrior, Motorola's chief technology officer, in a statement.

WiMax, or 802.16, has been widely tipped as the technology that will power broadband wireless networks that are much faster than the Wi-Fi hot spots of today. Motorola says that OFDM is already used in fixed and nomadic broadband wireless applications such as Wi-Fi and WiMAX, and is being studied for use in the next generation of cellular equipment.

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