System object: phased.RangeDopplerResponse
Package: phased
Calculate rangeDoppler response
[resp,rnggrid,dopgrid]
= step(H,x)
[resp,rnggrid,dopgrid]
= step(H,x,xref)
[resp,rnggrid,dopgrid]
= step(H,x,coeff)
[resp,rnggrid,dopgrid]
= step(H,___,prf)
Starting in R2016b, instead of using the step
method
to perform the operation defined by the System
object™, you can
call the object with arguments, as if it were a function. For example, y
= step(obj,x)
and y = obj(x)
perform
equivalent operations.
[
calculates
the rangeDoppler response of the input signal, resp
,rnggrid
,dopgrid
]
= step(H
,x
)x
. resp
is
the complex rangeDoppler response. rnggrid
and dopgrid
provide
the range samples and Doppler samples, respectively, at which the
rangeDoppler response is evaluated. This syntax is available when
you set the RangeMethod
property to 'FFT'
and
the DechirpInput
property to false
.
This syntax is most commonly used with FMCW signals.
[
uses resp
,rnggrid
,dopgrid
]
= step(H
,x
,xref
)xref
as
the reference signal to dechirp x
. This syntax
is available when you set the RangeMethod
property
to 'FFT'
and the DechirpInput
property
to true
. This syntax is most commonly used with
FMCW signals, where the reference signal is typically the transmitted
signal.
The object performs an initialization the first time the object is executed. This
initialization locks nontunable properties (MATLAB)
and input specifications, such as dimensions, complexity, and data type of the input data.
If you change a nontunable property or an input specification, the System
object issues an error. To change nontunable properties or inputs, you must first
call the release
method to unlock the object.

RangeDoppler response System object 

Input data, specified as a complexvalued KbyL matrix or KbyNbyL array where
Specific requirements depend on the syntax:
In the case of an FMCW waveform with a triangle sweep, the sweeps
alternate between positive and negative slopes. However,
You can specify this argument as single or double precision. 

Reference signal, specified as a column vector having the same number of rows as


Matched filter coefficients, specified as a column vector. You can specify this argument as single or double precision. 

Pulse repetition frequency, specified as a positive scalar. To enable this argument, set the 

RangeDoppler response of
 

Range samples at which the rangeDoppler response is evaluated.  

Doppler samples or speed samples at which the rangeDoppler
response is evaluated. 