speed2dop
Convert speed to Doppler shift
Description
Examples
Calculate Doppler Shift from Speed
Calculate the Doppler shift in hertz for a given carrier wavelength and source speed. The radar frequency is 24.15 GHz. Assume a radial speed of 35.76 m/s.
radvel = 35.76;
f0 = 24.15e9;
lambda = physconst('LightSpeed')/f0;
doppler_shift = speed2dop(radvel,lambda)
doppler_shift = 2.8807e+03
Input Arguments
radvel
— Radial velocity
scalar | vector | matrix
Radial velocity in meters per second, specified as a scalar, vector, or matrix.
Data Types: double
lambda
— Wavelength
positive scalar
Wavelength in meters, specified as a positive scalar.
Data Types: double
Output Arguments
dps
— One-way Doppler shift
scalar | vector | matrix
One-way Doppler shift in hertz, returned as a scalar, vector, or matrix.
More About
Doppler-Radial Velocity Relation
The Doppler shift of a source relative to a receiver can be computed from the relative radial velocity between the source and receiver:
where Δf is the Doppler shift in hertz, Vs,r denotes the radial velocity of the source relative to the receiver, and λ is the carrier frequency wavelength in meters.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
Does not support variable-size inputs.
References
[1] Rappaport, T. Wireless Communications: Principles & Practices. Upper Saddle River, NJ: Prentice Hall, 1996.
[2] Skolnik, M. Introduction to Radar Systems, 3rd Ed. New York: McGraw-Hill, 2001.
Version History
Introduced in R2011a
See Also
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