Apply decibel gain
The dB Gain block multiplies the input by the decibel values specified in the Gain parameter. For an M-by-N input matrix u with elements uij, the Gain parameter can be a real M-by-N matrix with elements gij to be multiplied element-wise with the input, or a real scalar.
The value of k is 10 for power signals (select Power as the Input signal parameter) and 20 for voltage signals (select Amplitude as the Input signal parameter).
The value of the equivalent linear gain
is displayed in the block icon below the dB gain value. The output is the same size as the input.
The dB Gain block supports real and complex floating-point and fixed-point data types.
The following diagram shows the data types used within the dB Gain subsystem block for fixed-point signals.
The settings for the fixed-point parameters of the Gain block in the diagram above are as follows:
Integer rounding mode: Floor
Saturate on integer overflow — unselected
Parameter data type mode — Inherit via internal rule
Output data type mode — Inherit via internal rule
See the Gain reference page for more information.
The dB gain to apply to the input, a scalar or a real M-by-N matrix. Tunable.
The type of input signal: Power or Amplitude. Tunable.
Double-precision floating point
Single-precision floating point
Fixed point (signed and unsigned)
8-, 16-, and 32-bit signed integers
8-, 16-, and 32-bit unsigned integers