| OVERVIEW
OF UN RECEIVER |
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| W-CDMA
TRANSMITTER |
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| W-CDMA
RECEIVER |
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| USER
ACTIVITIES |
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| SAMPLE
SCREEN |
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| MODEL
DIAGRAM OF UN RECEIVER |
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The way the UN Receiver communicates with the broadcasting station
is exactly the same way as the current mobile cellular phones do.
The central broadcasting station is connected via landlines (most
probably optic fibres) to transmission towers. The transmission
towers are located at various locations, may be at 10 km distance
from each other, and serving customers within 5 km radius of each
tower. There are preset control frequencies through which the towers
and the handset establish communication channels, and once this
is done, the transmission happens in full duplex mode on the chosen
frequencies.
SMS is indeed digital data being transmitted from the towers to
the handset. The UN Receiver modulates music into voice like data,
and transmitts using CDMA technology. And there’s nothing new
about CDMA itself or the modulation and demodulation techniques
or frequency spectrum usage. How UN Receiver differs is the way
it applies known technologies for achieving a purpose that has not
been achieved so far.
- BBC uses FM and AM technologies to transmit their programs,
whereas the UN Receiver proposes to use CDMA.
- Whereas the people at BBC can only guess how many users are
tuned in, the administrative module of UN Receiver can indicate
the number of users at any point of time.
- The listeners of BBC cannot decide what they want to listen,
whereas the users of UN Receiver can.
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