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Motorola to push OFDM for high-speed wireless apps

Posted: 30 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:orthogonal frequency division multiplexing? ofdm? ieee? itu? etsi?

Motorola will be pushing for the use of orthogonal frequency division multiplexing (OFDM) as the technology of choice for ultra high-speed wireless communications following field experiments and research at Motorola Labs which demonstrate that OFDM can support networks with a peak downlink speed of up to 300Mbps.

The company plans to share the research with and promote the technique at standards setting bodies such as the IEEE, ITU, ETSI, 3GPP and 3GPP2.

Motorola Labs has just completed a series of mobile wide area broadband wireless field experiments using OFDM on a 20MHz bandwidth channel with multiple antenna handheld devices. Applying data from the field experiments in laboratory tests, Motorola Labs validated that a 20MHz mobile OFDM channel can support peak uncoded channel data rates of up to 300Mbps.

The tests were conducted in the greater Chicago area in both urban and suburban environments. Data throughputs of 20Mbps were achieved with a latency of just 25ms while simultaneously demonstrating real-time applications including videoconferencing, multi-Mbps streaming video, and voice over IP and traveling at typically 60MPH.

Motorola says the combination of OFDM with other technologies such as adaptive modulation and coding, fast automatic repeat request (hybrid ARQ), multiple antennas and advanced error control coding offers the best prospects for future wide area broadband wireless systems.

- John Walko

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