Peak Data Rate Calculator

Calculator Inputs

Channel Bandwidth (MHz)

Modulation Order

Coding Rate

Spatial Streams

Component Carriers

Usable Resource (%)

OFDM Efficiency (%)

Duplex Factor

Protocol Overhead (%)

Manual Spectral Efficiency Override (b/s/Hz)

Leave as 0 to use the calculated value from modulation, coding, and efficiency factors.

SNR for Shannon Comparison (dB)

This optional comparison estimates a theoretical upper bound, not a guaranteed practical rate.

Reset

Plotly Graph

Submit the calculator to generate the throughput comparison graph.

Example Data Table

Scenario	Bandwidth	Modulation	Coding Rate	Streams	Carriers	Usable %	OFDM %	Overhead %	Net Peak Rate
Wi-Fi style link	20 MHz	256	0.83	2	1	90	95	12	199.837 Mbps
Wideband radio	100 MHz	1024	0.90	4	2	92	96	10	5.722 Gbps
Conservative field setup	10 MHz	64	0.67	1	1	85	93	18	25.835 Mbps

Formula Used

This calculator combines modulation, coding, resource utilization, carrier aggregation, MIMO streams, duplexing, and protocol loss.

Bits per Symbol = log2(Modulation Order) Calculated Spectral Efficiency = Bits per Symbol × Coding Rate × Usable Resource Fraction × OFDM Efficiency Fraction Effective Spectral Efficiency = Manual Override or Calculated Spectral Efficiency Gross Peak Data Rate = Bandwidth(Hz) × Effective Spectral Efficiency × Spatial Streams × Component Carriers × Duplex Factor Net Peak Data Rate = Gross Peak Data Rate × (1 − Protocol Overhead Fraction) Shannon Reference = Bandwidth(Hz) × log2(1 + 10^(SNR/10)) × Streams × Carriers × Duplex Factor

Engineering note: Peak data rate is a theoretical maximum under chosen assumptions. Actual throughput depends on scheduling, retransmissions, guard intervals, interference, and implementation limits.

How to Use This Calculator

Enter the channel bandwidth in MHz for the radio channel or carrier block.
Choose the modulation order and enter the coding rate used by your system.
Set spatial streams and component carriers to represent MIMO and carrier aggregation.
Adjust usable resource and OFDM efficiency to reflect pilots, control, and framing overhead.
Set the duplex factor to represent full use, partial duty cycle, or half-duplex conditions.
Enter protocol overhead to convert gross physical layer rate into a practical net rate.
Optionally enter a manual spectral efficiency if your standard already defines it.
Submit the form, review the result box above the form, then export CSV or PDF.

FAQs

1) What does peak data rate mean?

Peak data rate is the maximum theoretical throughput a link can deliver under the selected bandwidth, modulation, coding, stream, and overhead assumptions.

2) Why is net rate lower than gross rate?

Net rate removes protocol overhead and payload inefficiencies. Headers, control signaling, guard resources, and framing reduce usable user throughput.

3) When should I use manual spectral efficiency?

Use it when a standard, datasheet, or vendor profile already provides spectral efficiency and you want to skip detailed modulation and coding assumptions.

4) What is the duplex factor for?

It scales throughput for duty cycle or duplex behavior. A value of 1 means full use, while 0.5 approximates half-time transmission.

5) Does the calculator predict real field throughput?

Not exactly. It estimates a best-case engineering rate based on your assumptions. Field results usually drop because of channel variation and scheduler behavior.

6) Why compare against Shannon capacity?

The Shannon reference gives a theoretical upper bound for the chosen SNR. It helps you judge how aggressive or conservative your design assumptions are.

7) How do MIMO streams affect throughput?

Each added spatial stream can increase throughput when the channel, hardware, and signal separation support independent data layers effectively.

8) Can I use this for Wi-Fi, LTE, 5G, and custom radios?

Yes. The structure is generic enough for many digital radio systems, provided your assumptions match the technology’s resource and overhead model.