300 Mbps mobile broadband
data rates 'achievable'
Results from field experiments and research conducted by Motorola Labs,
has proven existing Orthogonal Frequency Division Multiplexing (OFDM)
technology can support high-speed mobile networks with a peak downlink
speed of up to 300 Mbps. This research demonstrates that future all-IP
mobile networks using OFDM technology have the capability to provide a
broadband user experience that was previously thought to be unattainable.
Motorola Labs recently completed a series of mobile wide area broadband
wireless field experiments using OFDM on a 20 MHz bandwidth channel with
multiple antenna handheld devices. Applying data from the field experiments
in laboratory tests, they validated that a 20 MHz mobile OFDM channel
can support peak uncoded channel data rates of up to 300 Mbps.
The field tests of the mobile OFDM system were conducted in the greater
Chicago area, in both urban and suburban environments. In the field tests
they attained data throughputs exceeding 20 Mbps with a latency of just
25 milliseconds while simultaneously demonstrating real-time applications
including videoconferencing, multi-Mbps streaming video, and voice over
IP and traveling at typical highway speeds (in excess of 100 kilometers
per hour or 62 mph).
The promise of faster wireless networks that can meet the demand for
mobile broadband that supports multi-media applications has great appeal
to operators.
“As the telecomm industry becomes more complex and competitive,
operators need to get the most efficiency and speed from their networks
while delivering a superior end user experience at a greatly reduced cost
per bit,” said Adrian Nemcek, president and chief executive officer
of Motorola’s Global Telecom Solutions Sector. “Several leading
telecom operators from around the world have witnessed our continuing
OFDM field trials in Chicago and have been favorably impressed with the
performance. “
Motorola will be sharing its OFDM research experience in cooperation
with IEEE, ITU, ETSI, 3GPP and 3GPP2, and will be an active contributor
in introducing OFDM to the standards bodies. They also recently joined
the WiMAX Forum as a principal member. The WiMAX Forum promotes and certifies
compatibility of wireless broadband products based on the IEEE 802.16
standards.
OFDM is a radio technology that combines time and frequency multiplexing
to implement extremely high data rate wireless systems efficiently. It
is currently being adopted for fixed and nomadic broadband wireless applications
such as WiFi and WiMAX, and is being studied for use in the next generation
of cellular equipment.
The combination of OFDM with other technologies is seen as a key enabler
of the next generation of wide area broadband wireless systems. Some of
those other technologies include adaptive modulation and coding (AMC),
fast automatic repeat request (hybrid ARQ), multiple antenna techniques,
advanced error control coding techniques (turbo and LDPC coding) and a
unified approach to system development.
Motorola Labs also is conducting research into physical layer, data link
layer, medium access control, network and system designs for future broadband
cellular, public and private wide-area wireless systems. These systems,
broadly characterized as the next generation wireless service after 3G,
have additional applications into public and private systems. These systems
are expected to have sustained data rates beyond 20 Mbps, and peak data
rates upwards of 100 Mbps. Motorola has published reports and papers on
its research in OFDM and these topics at several IEEE conferences and
in journal publications. A reference list is available.
For more information about Motorola Labs, visit their website
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