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Initiating mobile WiMAX coverage in areas where
broadband wireless overlays are required has become much easier with the fully self contained base stations similar
to MacroMAXeŽ from Fujitsu.
These base stations operate with the approved
WiMAX Forum profiles and support the 2.3 and 2.5 GHz frequency bands, the prime bands for mobile WiMAX. With 20 Mhz channels
and MIMO bit rates of 75 Mbps can be supported. The base stations are outdoor versions and feature power outputs of 10W.
Beceem BCS200
BCS 200 is designed
for use in wave 2 certification profiles of IEEE802.16e which includes the use
of MIMO and beam forming in mobile environment. The BCS 200 has many features which are designed to comply to the certification
profiles and provide highest data throughputs. These include for example the
use of multiband multichannel direct conversion radio(DCR).This not only improves the signal quality by eliminating the surface
acoustic wave(SAW) filters but also makes the use of the BCSB200/BCSR200chipset
assembly possible in different markets with spectrum bands of 2.3,2.5,3.5 and
3.3 GHz.
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RNA200 is however unique in some ways as the SoC not only includes
the implementation of the PHY and the MAC layer functions but also includes an embedded CPU (ARM 1136) and analog modules
to reduce the chip count and space footprint. The RNA200 baseband modem (called “Tornado”) needs only an RFIC,
SDRAM and serial Flash memory to complete all the functionalities. The RFIC in use would be dependent on the frequency band
in use.
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