Noise Power Calculations in dB or dBm

Click For Summary
SUMMARY

The output noise power (No) is calculated using the formula No = k(Ts + Te)BG, where k is the Boltzmann constant, Ts is the system temperature, Te is the equivalent noise temperature, B is the bandwidth, and G is the gain. When expressing noise power in dB or dBm, the calculation involves using 10Log10(Value) for dB and 10Log10(P/P0) for dBm, where P is the power and P0 is 1 mW. It is essential to use dBm for noise power calculations to ensure accurate representation.

PREREQUISITES
  • Understanding of noise power calculations
  • Familiarity with dB and dBm units
  • Knowledge of Boltzmann constant (k)
  • Basic concepts of system temperature (Ts) and equivalent noise temperature (Te)
NEXT STEPS
  • Research the Boltzmann constant and its applications in noise calculations
  • Learn about the relationship between bandwidth (B) and noise power
  • Explore advanced noise figure calculations in communication systems
  • Study the impact of gain (G) on overall system performance
USEFUL FOR

Electrical engineers, telecommunications professionals, and anyone involved in signal processing or noise analysis will benefit from this discussion.

Kartik.Sulakh
Messages
7
Reaction score
0
The ourput Noise Power is given as
No = kTsBG + kTeBG
...= k.(Ts+Te).B.G
But when it is asked in dB or dBm,
How to calculate it something like 10Log10(Value) or 20Log10(Value)
 
Engineering news on Phys.org
dBm is a unit of power (dB referenced to 1 mW)
dB is a (dimensionless) ratio (value/reference in dB).

Hence, if you want noise power you need to use dBm.
All you need is 10log10 (P/P0) where P is the power and P0 is 1 mW.
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
Replies
19
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 18 ·
Replies
18
Views
8K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 3 ·
Replies
3
Views
7K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 7 ·
Replies
7
Views
23K