Documentation

This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

stretchfreq2rng

Convert frequency offset to range

Syntax

R = stretchfreq2rng(FREQ,SLOPE,REFRNG)
R = stretchfreq2rng(FREQ,SLOPE,REFRNG,V)

Description

R = stretchfreq2rng(FREQ,SLOPE,REFRNG) returns the range corresponding to the frequency offset FREQ. The computation assumes you obtained FREQ through stretch processing with a reference range of REFRNG. The sweeping slope of the linear FM waveform is SLOPE.

R = stretchfreq2rng(FREQ,SLOPE,REFRNG,V) specifies the propagation speed V.

Input Arguments

FREQ

Frequency offset in hertz, specified as a scalar or vector.

SLOPE

Sweeping slope of the linear FM waveform, in hertz per second, specified as a nonzero scalar.

REFRNG

Reference range, in meters, specified as a scalar.

V

Propagation speed, in meters per second, specified as a positive scalar.

Default: Speed of light

Output Arguments

R

Range in meters. R has the same dimensions as FREQ .

Examples

collapse all

Calculate the range corresponding to a frequency offset of 2 kHz obtained from stretch processing. Assume the reference range is 5000 m and the linear FM waveform has a sweeping slope of 2 GHz/s.

r = stretchfreq2rng(2e3,2e9,5000)
r =

   4.8501e+03

Related Examples

References

[1] Richards, M. A. Fundamentals of Radar Signal Processing. New York: McGraw-Hill, 2005.

Introduced in R2012a

Was this topic helpful?