Radar Target
Radar Target.
Description
The Radar Target block models a radar target that reflects a signal according to a given radar cross section (RCS). The block supports the non-fluctuating target model and all four Swerling target models. The unit does not support polarised signals.
Ports
Input
X - incident signal
complex vector-column N by 1 | complex matrix M by N
The incident signal is in the form of a complex vector-column N by 1 or a complex matrix M by N. The value of M is the number of signals. Each signal corresponds to a different target. The value N is the number of samples in each signal.
The size of the first dimension of the input matrix may be varied to simulate a varying signal length. The size variation may occur, for example, in the case of a pulse signal with a variable pulse repetition rate.
Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.
RCS - radar cross section
non-negative scalar | non-negative vector-string 1 on M
Average radar cross section as a non-negative scalar or non-negative vector-string 1 on M. M is the number of targets. This parameter applies to oscillating and non-varying targets. If you specify M incident signals, you can specify the effective target pattern as a scalar or as a vector of 1 on M. For a scalar, the same value will be applied to all signals. Units are given in m².
Dependencies
To use this port, set the Source of mean radar cross section parameters to Input port.
Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.
Update - radar cross section update indicator
0 | 1
Indicator for updating the radar cross section for oscillating targets as 0 or 1. When 0 is set, the radar cross section is constant. When set to 1, the effective reflective area of the radar fluctuates.
Dependencies
To use this port, set the Fluctuation model parameters to any value other than `Nonfluctuating'.
Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.
Parameters
Source of mean radar cross section - source of mean radar cross section
Property (by default) | Input port
Specify whether the source of the mean radar cross section (RCS) value is the Mean radar cross section parameter of this block or the input port. The values of this parameter are:
-
Property- The Mean radar cross section parameter for this block specifies the average RCS value. -
Input port- Selecting this value creates an RCS input port to set the average radar cross section.
Mean radar cross section (m^2) - the average radar cross section
1
Set the mean value of the target radar cross section in square metres as a non-negative scalar.
Dependencies
This parameter is used if the Source of mean radar cross section parameter is set to Property.
Fluctuation model - fluctuation model
Nonfluctuating (By default) | Swerling1 | Swerling2 | Swerling3 | Swerling4
Specify the statistical model of the target as one of Nonfluctuating, Swerling1, Swerling2, Swerling3 or Swerling4.
Setting this parameter to a value other than Nonfluctuating allows cross section parameters to be set via the Update input port.
*Propagation speed (m/s)` -signal propagation speed
299792458 (By default) | positive scalar
Signal propagation speed as a real positive scalar. By default, the value of the speed of light (299792458 m/s) is used.
Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.
Operating frequency (Hz) - carrier frequency of the signal
3e8 (By default) | Positive scalar
The carrier frequency of the signal that is reflected from the target, specified as a positive scalar. The unit of measurement is Hz.