3 ms·
Or using the word "bandwidth" to refer to "capacity" or "data throughput" rather than "the width of the band that the signal occupies". Arrrrgh. Yes the two thi
by myself248 5y ago
Or using the word "bandwidth" to refer to "capacity" or "data throughput" rather than "the width of the band that the signal occupies". Arrrrgh. Yes the two things are the same for certain naïve modulations, but the whole point of using a better modulation is that you get more throughput for the same bandwidth. Understanding this requires first unlearning the abuse of the term, and that's hard work for a lot of engineers who really need to understand this.
- jbay808 5y agoShannon's channel theorem states that the information capacity of a channel is directly related to the bandwidth and the signal-to-noise ratio, even if you use the best possible modulation scheme: https://en.m.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem https://en.m.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theo...
- p1esk 5y agoHe’s talking about throughput, not the information capacity of the channel.
- jbay808 5y agoCan you explain the difference? They seem to me like virtually the same concept, but you seem to see an important distinction.
- p1esk 5y agoChannel capacity is an ideal theoretical concept establishing a maximum data transmission rate over a channel with strong assumptions about the noise in that channel. Throughput is what you actually get in the real world, and it depends on many things, including a modulation scheme, retransmission protocols, specific noise models, etc.
- jbay808 5y agoFair enough. But in review, they were indeed talking about the capacity: > Or using the word "bandwidth" to refer to "capacity"[...]