matchinggain

Gain due to matched filtering

Since R2021a

Syntax

gain = matchinggain(pw,bw)

gain = matchinggain(pw,bw,lr)

Description

gain = matchinggain(pw,bw) returns the gain due to matched filtering.

gain = matchinggain(pw,bw,lr) specifies the reduction in signal-to-noise ratio (SNR) gain due to nonideal filtering.

Examples

Range Processing Gain

Compute the range processing gain of a side-looking airborne synthetic aperture radar (SAR). The waveform has an effective pulse width of 100 microseconds. The antenna noise bandwidth is 5 MHz. Assume a nonideal range filtering loss of 1.3 dB.

pw = 100e-6;
bw = 5e6;
lr = 1.3;

Compute the range processing gain.

gain = matchinggain(pw,bw,lr)

gain = 
25.6897

Input Arguments

pw — Effective pulse width

positive real scalar | vector

Effective pulse width of the radar waveform in seconds, specified as a positive real scalar or a vector.

Data Types: double

bw — Noise bandwidth

positive real scalar | vector

Noise bandwidth at the antenna in hertz, specified as a positive real scalar or a vector.

Data Types: double

lr — Reduction in SNR gain

0 (default) | nonnegative scalar

Reduction in signal-to-noise ratio (SNR) gain in decibels, specified as a nonnegative scalar. This argument corresponds to the loss with respect to the ideal gain. Typical window functions like hamming and hann exhibit losses on the order of 1 dB. The argument defaults to 0, which assumes a rectangular window.

Data Types: double

Output Arguments

gain — Gain due to matched filtering

matrix

Gain due to matched filtering in decibels, returned as a matrix. The rows of gain correspond to the pulse width values in pw. The columns of gain correspond to the bandwidth values in bw.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2021a