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Adaptive Coding and Modulation: Does the Bit rate change?

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blade88

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Hi,

In adaptive coding and modulation (ACM) the modulation and coding change, according to the channel conditions.

As I understand, the useful information throughput is changed: when the channel is "bad", the coding bits increase and when the channel is "good", the coding bits decrease.

However, does the bit rate change?

thank you
 

greygoo2012

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Bit rate changes when the modulation changes. However, if you are just choosing different code rates, bit rate doesn't change.
 
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