# Questions tagged [capacity]

Capacity refers to the capability of a channel to transport data, typically measured in bits per channel usage.

24 questions
Filter by
Sorted by
Tagged with
68 views

### OFDM system capacity if we double the subcarriers

Suppose we have two OFDM based systems A & B. System A has $N$ subcarriers and bandwidth $W$, and the number of samples in the CP is 10% of $N$. System B has $2N$ subcarriers, $2W$ bandwidth and ...
• 11
1 vote
266 views

### What is the intuition explaining the Shannon-Hartley theorem?

In the digital domain, the signal to noise ratio (SNR) may be interpreted loosely but usefully as the number of discrete or quantized levels one can transmit reliably. For instance, loosely speaking, ...
• 301
46 views

### Binary-Input AWGN Channel Capacity

I am trying to reproduce graph 1.7 from the book Channel Codes: Classical and Modern. The graph contains the capacity plots for both soft-decision and hard-decision decoding plus the Shannon limit. I ...
60 views

### Are there any techniques that can achieve higher transmission rate than Shannon capacity?

The maximum bit rate that can be transmitted over a channel with bandwidth B is determined by Shannon C=B log(1+S/N) Are there any techniques that could break this limit?
• 367
75 views

• 169
1 vote
40 views

### Modulation with Maximum Likelihood decoder and capacity

My question comes from the high spectrum efficiency claim of OFDM. This seems not correct IMHO, at least theoretically. For me, we lose energy in using cyclic prefix, hence OFDM should be a waste of ...
• 53
52 views

### Assessing relative wireless channel quality using Capacity and Condition Number CDFs

I have Channel capacity analysis figures for two wireless channels show below: My question: While ergodic capacity in the first subplots are very clear in conveying the channel capacity, How to make ...
• 418
1 vote