Nortel has achieved another wireless technology milestone, demonstrating a significant increase in data throughput using beyond 3G (third generation) MIMO (multiple-input, multiple-output) and OFDM (orthogonal frequency division multiplexing).
The demonstration took place at Nortel's Wireless Technology Lab in Ottawa. Nortel will highlight its 3G MIMO and OFDM success and recent learnings from its lab at CTIA Wireless 2005 in New Orleans.
MIMO and OFDM will make it possible for wireless subscribers to download bandwidth-hungry applications, large file transfers, streaming video and mobile gaming, at speeds higher than today's commercial 3G networks. Nortel has invested in advanced development of OFDM and MIMO for the past six years and has demonstrated the benefits and commercial feasibility of these technologies to more than 100 customers.
OFDM and MIMO together can support up to two times more subscribers than OFDM alone. This will position service providers to make more efficient use of existing spectrum.
In Ottawa, Nortel demonstrated large information transfers with peak data rates at 37 Mbps over a standard 5MHz PCS mobility band, taking into account noise and fading conditions found on a real-world cellular network. The test network showed that with OFDM and MIMO, wireless subscribers can download a 128 MB file in approximately 30 seconds, four to 10 times faster than today's 3G wireless networks.
OFDM is the base radio technology used by WiFi (802.11) and WiMAX (802.16). MIMO is an advanced antenna and space-time processing technology. The first broad deployment of standards-based wireless wide area networks employing OFDM technology is anticipated in 2006 with the introduction of WiMAX 802.16e products. In addition, Nortel is also proposing OFDM/MIMO as its evolution vision beyond HSDPA/HSUPA and CDMA 1xEV-DO into 3GPP and 3GPP2 wireless standards.
In 2001, Nortel completed an extensive propagation trial in central London, England, proving the feasibility of MIMO to provide substantial performance gains in an urban deployment. In February 2003, Nortel demonstrated OFDM and MIMO peak data rates of 20 Mbps over a standard 5MHz PCS band. The recent Ottawa demonstration nearly doubled that speed.