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Axis
Network Technology launches high power WiMAX Remote Radio Heads
Other Topics: WiMAX Developers Kit,
Denver WiMAX Network
Axis Network Technology
August 21, 2008
High efficiency mast-mounted MIMO subsystems with up to 28W downlink
power deliver lower CAPEX and OPEX for 2.5GHz and 3.5GHz WiMAX networks
Axis Network Technology (AxisNT) has announced the immediate
availability of a family of MIMO Remote Radio Heads (RRH) for OEM
deployment of WiMAX networks worldwide. The RRHs are available for both
2.5GHz and 3.5GHz networks, and can be customised to meet the specific
interface and packaging requirements of the OEM. Designing WiMAX
basestations using a distributed RRH approach with highly efficient
digital-to-RF conversion and amplification considerably reduces both
CAPEX and OPEX of the overall system as well as maintenance costs. |
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The use of an RRH allows the radio to be
located alongside the antennas and physically separate from the
basestation (BTS), removing the losses associated with long cable runs
by replacing them with an optical fibre data interface. The AxisNT RRH
presents flexible multi-gigabit BTS connections, communicating via
OBSAI, CPRI or custom OEM fibre interfaces.
Axis RRH models are available for use in the 2.3 – 2.7GHz and 3.3 –
3.8GHz spectrum bands, and Axis radios are configurable for frequencies
between 400MHz and 4GHz. Each of the models offers dual channel
operation for MIMO, to comply with WiMAX and IEEE 802.16 d/e standards.
They are also capable of 4-channel MIMO operation using 2-channel units
driven separately from OBSAI/CPRI or daisy chained. Channel bandwidth is
variable between 3.5MHz and 20MHz for TDD or FDD air interfaces.
Employing high efficiency advanced power amplifier technologies, the RRH
units are available in several options with downlink output power levels
of up to 28W . The advanced power amplifier design features include
PowerDPD™ Digital Pre-Distortion, digitally controlled Doherty
amplifiers and flexible wideband crest factor reduction (CFR).
The RRH also feature automatic calibration of transmit, receive and PA
bias control loops, and are fitted with OBSAI RP3-01 or CPRI V2 digital
baseband interfaces with either 1 or 2 optical connectors as required.
They integrate an AxisIPR™ configurable IP radio processor, along with
an AxisOS™ remote management and local craft interfaces. Support for
Adaptive Antenna Systems (AAS) and AISG v2.0 antenna control is
provided.
Superior receiver performance of better than -98dBm can be achieved with
single channel operation, and better than -100dBm using MIMO. A
distributed BTS using 2-channel RRH with 28W downlink power is the
equivalent of transmitting 56W downlink power from a traditional ground
based BTS (assuming 3dB cable losses). Power consumption is reduced to a
fraction of a traditional base station, thus reducing OPEX.
“Using a distributed Remote Radio Head design triples basestation
efficiency, which not only makes them around 60% cheaper to run but also
makes them a greener option,” commented Simon Mellor, CEO of AxisNT.
“The flexibility in deployment that results from using fibre optic
cables rather than RF cables reduces the basestation footprint too,
meaning lower site rental costs for the operator and a further reduction
in environmental impact.”
A standard RRH implementation involves a close cooperation between the
customer and the AxisNT engineering team, to perform interoperability on
the OBSAI and/or CPRI digital interface implementation. Products are
available with a variety of interface connector options, with a single
or dual fibre optic interface for up to 10km of FO cables, a choice of
compact and lightweight packaging, and they can also be fitted with an
optional customised solar shield. The RRH are optimised for low power
consumption and feature a wide input voltage range to provide
flexibility in site installation. A built in handle and a variety of
mounting brackets allow ease of installation. Additionally AxisNT will
customise its RRH for the specific requirements of OEM customers, in
respect of connectors, packaging and labels.
About Axis Network Technology
Axis Network Technology (AxisNT) was founded in the UK by a team of
highly experienced telecommunication executives, with the aim of
developing and marketing the next generation of re-configurable digital
radio platforms. One of the Company’s main strengths is that it combines
expertise in RF technology with digital and baseband design experience,
and this allows it to deliver fully operational end-to-end systems
direct to the OEM.
Axis' goal is to be the number one provider of compact digital radio
platform technology and Radio Remote Heads for current and emerging
wireless standards, delivering flexible, energy-efficient converged
basestation systems for use with global broadband wireless standards –
TD-SCDMA, UMTS, WiMAX, LTE and DVB – including triple-play and quad-play
voice, video and data services.
The Company’s in-house design expertise in digital radios is combined
with an established logistics chain that includes circuit manufacture
via global EMS and strategic device technology partnerships. For more
information see www.axisnt.com. |
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