called SiBEAM. SiBEAM became part
of the chip provider Silicon Image in
2011. They have further developed
and fine-tuned the standard that is
now promoted and managed by the
The WirelessHD standard also
uses 2. 16 GHz channels in the 57 to
64 GHz spectrum. Like WiGig, it
uses OFDM to achieve high data
rates. One version uses 512
subcarriers and QPSK or 16QAM to
achieve a data rate to 3. 8 Gbps. A
slower version uses 128 subcarriers
for data rates to 40 Mbps. Silicon
Image claims that even faster versions
are possible with data rates of 10 to
28 Gbps. This makes the WirelessHD
standard attractive for wireless HDMI
and other video cable standards like
MHL and DVI.
WirelessHD also uses the phased
antenna array for gain that produces
an effective radiated power (ERP) up
to 10 watts. The resulting narrow
beam is also steerable to avoid
interference and obstacles. Typical
maximum range is 10 meters.
The latest WirelessHD chip from
Silicon Image is the UltraGig 6400.
This transceiver is housed in a 7 x 10
mm chip that is easy to embed in
portable gear. Figure 1 shows its
potential incorporation into a smart
; FIGURE 1.
This illustration shows Silicon Image’s UltraGig 6400 60 GHz transceiver and
how it may be incorporated into a smartphone.
If you are okay with compressed
HDTV video, you do have some
other cable replacement choices.
For example, the IEEE 802.11n
standard with its MIMO feature can
crank out a data rate to 450 Mbps in
the 2. 4 and 5 GHz Wi-Fi bands.
Some TV sets, STBs, and DVD
players already use this technology.
Another alternative is the more
recent 802.11ac standard. It too
uses MIMO, but works in the 5
MHz band with wider bandwidths
of 40, 80, and 160 MHz to produce
data rates over 1 Gbps, with 900
Mbps being the most common.
One more choice is ultra
wideband (UWB). This has been
around for a while and works in the
3.1 to 10. 6 GHz unlicensed band
using OFDM. It can achieve a data
rate from 53 up to 480 Mbps. It is
already used in laptops, docking
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