# Group 9 - CONSTRAINED CHANNELS By Pim Linders What are...

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CONSTRAINED CHANNELS By: Pim Linders

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What are Constrained Channels?
Channel Capacity What is channel capacity? The maximum number of bits that can be handled in a particular channel with small error probability. Unlimited amounts of error-free data could theoretically be transmitted over an infinite bandwidth, noise-free communications channel. However, real- world signals are limited by both bandwidth constraints and noise. Can we calculate the maximum number of bits that can be handled in a particular channel? Yes! using the Shannon–Hartley theorem.

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Shannon–Hartley theorem What is the Shannon–Hartley theorem? The Shannon-Hartley theorem tells us the maximum amount of error-free data that can be transmitted over a communications channel such as a copper wire or an optical fiber.
Shannon–Hartley theorem C apacity = b andwidth x log 2 (1 + S/N ) C is the channel capacity B is the bandwidth of the channel S is the total signal power N is the total noise power S/N is the signal-to-noise ratio (SNR)

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Shannon–Hartley theorem Example
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