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Cognitive Wireless Networking in the TV Bands - page 44 / 56

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Time-Spectrum Block

If node vi is allocated time-spectrum block B

Amount of data it can transmit is

Channel-Width

Time Duration

Signal propagation

properties of band

Overhead

(protocol overhead,

switching time, coding scheme,…)

Capacity of Time-Spectrum Block

In this paper:

Capacity linear in

the channel-width

Constant-time overhead

for switching to new block

Time

Frequency

t

t+¢t

f

f+¢f

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