Range Angle Response

The input signal data given as a complex matrix K by N or a complex array K by N by L. The content of the input data depends on the angle measurement method given by different parameters.

The number of samples for the first dimensionality of the input matrix may be varied to simulate a change in the duration of the signal. The change in dimension may occur, for example, in the case of a pulse waveform with a variable pulse repetition rate.

Pulse repetition frequency.

Dependencies

To enable this input argument, set the Range processing method parameters to FFT and do not select the Dechirp input signal checkbox.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

The reference signal used for matched filtering, given as a complex vector-column K by 1. The number of rows shall be equal to the number of fast time samples (within one sensing period) at port X.

Dependencies

To enable this input argument, set the Range processing method parameters to FFT and select the Dechirp input signal checkbox.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Support for complex numbers: Yes

The coefficients of the matched filter given as a complex vector-column P by 1. P must be less than or equal to the number of fast time samples K on port X.

Dependencies

To enable this input argument, set the Range processing method parameters to Matched filter.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Support for complex numbers: Yes

Elevation angle for the response from some bearing, set as a scalar in the range from −90° to 90°. The angle-distance response is calculated for this elevation angle. The units of measurement are degrees.

Dependencies

To enable this argument, set the Source of elevation angle parameters to Input port.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Range response data returned in one of the views:

The value of M depends on the type of processing.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Support for complex numbers: Yes

Range values by range, returned as a real-column vector M by 1. This vector defines the ranges corresponding to the fast time measurement (within one sensing period) of the RESP output data cube. M is the number of fast time or range samples in the RESP cube. Range values are monotonically increasing and uniformly distributed. The units of measurement are metres.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

The angle values corresponding to the bearing of interest are returned as a real vector-column P by 1. The units are degrees.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Signal propagation speed as a real positive scalar. By default, the value of the speed of light is 3e8 m/c.

The unit of measurement is metres per second.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Carrier frequency of the system specified as a positive scalar. The unit of measurement is hertz.

Range processing method specified as Matched filter or FFT.

Select the checkbox to inherit sample rate from upstream blocks. Otherwise, set the sample rate using the Sample rate (Hz) parameters.

The sampling frequency of the signal as a positive scalar. The unit of measurement is hertz.

Dependencies

To use this parameters, clear the Inherit sample rate checkbox.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

The slope of the linear FM sweep, specified as a scalar. The fast time dimension of the input port X must correspond to sweeps with this slope.

*Example: 1.5e9

Dependencies

To use this parameter, set the Range processing method parameters to FFT.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Select this check box to have the unit perform the input signal time filtering operation. Clear this check box to indicate that the input signal has already been filtered and no operation is required.

Dependencies

To use this parameter, set the Range processing method parameter to FFT.

The size of FFT used for processing decrypted signals in range is set as Auto or Property.

Dependencies

To use this parameter, set the Range processing method parameters to FFT.

The FFT length used for range processing is set as a positive integer.

Dependencies

To use this parameter, set the Range processing method parameter to FFT and the Source of FFT length in range processing parameter to Property.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Specify the window used to process the range using one of the following values: None, Hamming, Chebyshev, Hann, Kaiser, Taylor.

If you set this parameter to Taylor, the generated Taylor window will have four almost constant side petals adjacent to the main petal.

Dependencies

To use this parameter, set the Range processing method parameter to FFT.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Sidelobe attenuation level as a positive scalar.

This attenuation applies only to Chebyshev, Kaiser or Taylor windows. The unit of measurement is dB.

Dependencies

To use this parameter, set the Range processing method parameter to FFT and the Range processing window parameter to Chebyshev, Kaiser or Taylor.

Select this checkbox to set the discrete grid reference offset by range. Otherwise, the reference range will correspond to the start of the discrete grid.

Dependencies

To use this parameter, set the Range processing method parameter to FFT.

Data types: Bool.

The initial coordinate of the discrete range grid specified as a non-negative scalar.

The units of measurement are metres.

*Example: 1000.0

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

The source of elevation angle specified as Property or Input port.

The elevation angle used to calculate the range-angle response is specified as a scalar. The angle must be in the range of −90 to 90 degrees. This property is applied when you set the Elevation Angle Source parameters to Property. By default, the value of this property is 0.

The size of the angular sector, given as a real vector 1 by 2. The object calculates the angular response in the angle range, [min_angle, max_angle].

*Example: [-45, 45]

The number of bearings in the angular sector used for angle calculation is set as a positive integer greater than two.

*Example: [256]

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Array assignment method. Available values:

Type of antenna array element.

Available values:

The operating frequency range of the antenna array element as a 1-by-2 string-vector in the form of [LowerBound,UpperBound]. The element has no response outside this frequency range. Frequency measurement units are Hz.

Dependencies

To use this parameter, set the Element type parameters to Isotropic Antenna, Cosine Antenna or Omni Microphone.

Set this flag to exclude radiation to the rear hemisphere. The response from the rear hemisphere at all azimuth angles outside the ±90° interval from the broadside are set to zero. The broadside direction is defined as an azimuth angle of 0° and a place angle of 0°.

Dependencies

To use this parameter, set the Element type parameters to Isotropic Antenna or Omni Microphone.

Axis direction along the null radiation.

Dependencies

To use this parameter, set the Element type parameters to Cardioid Antenna.

The exponent of the degree of the exponent of cosine model as a non-negative scalar or a 1-by-2 real matrix of non-negative values. If the Exponent of cosine pattern is a 1 by 2 vector, the first element is the exponent of the exponent degree in the azimuth direction and the second element is the exponent of the exponent degree in the angle-of-place direction. When this parameters is scalar, the cosines in the azimuth and elevation directions are raised to the same degree.

Dependencies

To use this parameter, set the Element type parameter to Cosine Antenna.

The array of operating frequencies of the antenna array element as a string vector 1 on of increasing real values. The element has no response outside the frequency range given by the minimum and maximum elements of this vector. The units of frequency measurement are Hz.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna or Custom Microphone. To set the response at these frequencies, use the Frequency responses (dB) parameters.

The frequency response of custom antenna array elements is determined by the Operating frequency vector (Hz) parameters. The dimensions of the Frequency responses (dB) vector must match the dimensions of the vector defined by the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna or Custom Microphone.

Selects the user antenna pattern coordinate system, either az-el or phi-theta is specified. When az-el is selected, the Azimuth angles (deg) and Elevations angles (deg) parameters are used to specify the coordinates of the directional pattern points. When the `phi-theta parameter is specified, the Phi angle (deg) and Theta angles (deg) parameters are used to specify the coordinates of the pattern points.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

The azimuth angle values for which the antenna radiation pattern will be calculated as vector-string 1 at . must be greater than 2. The values of the azimuth angles must lie in the range from −180° to 180° inclusive and be in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to az-el.

The values of the place angles at which you want to calculate the radiation pattern as vector 1 at . must be greater than 2. The units of measurement of the angles are degrees. The elevation angles should lie in the range from −90° to 90° inclusive and should be in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to az-el.

Angular coordinates Phi of the points at which the antenna radiation pattern is specified. Defined as a real vector-string 1 on . must be greater than 2. The units of measurement of the angles are degrees. The values of the angles Phi must lie in the range from 0° to 360° and be arranged in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to phi-theta.

Theta angular coordinates of the points where the antenna radiation pattern is specified. Defined as a real vector-string 1 on . must be greater than 2. The units of measurement of the angles are degrees. Values of the angles Theta must lie in the range from 0° to 180° and be arranged in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to phi-theta.

Antenna pattern magnitude given as a matrix by or an array by by .

The value of is equal to the value of the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

The phase radiation pattern of the combined antenna, given as a matrix on or an array on on .

The value of is equal to the value of the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

If the parameters value is on, the pattern of the antenna element is rotated to align with the array normal. If off, the pattern of the element is not rotated.

If the antenna is used in an antenna array and the Input Pattern Coordinate System parameters is set to az-el, checking this checkbox rotates the pattern so that the x-axis of the element coordinate system points along the array normal. If no selection is made, the element pattern without rotation is used.

If the antenna is used in an antenna array and the Input Pattern Coordinate System parameters is set to phi-theta, checking this checkbox rotates the pattern so that the z-axis of the element coordinate system points along the array normal.

Use this parameter together with the Array Normal parameter of the URA and UCA arrays.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

Antenna pattern beamwidth in degrees.

Dependencies

To use this parameter, set the Element type parameters to Gaussian Antenna.

The frequency values for the polar radiation pattern are given as a real scalar or real vector-string 1 on . The frequencies lie within the frequency range specified by the parameter Operating frequency vector (Hz).

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

The angle values for the microphone’s polar pattern are specified as a vector . The angles are measured from the centre axis of the microphone and should range from −180° to 180° inclusive.

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

Set the polar pattern magnitude of the user microphone element as a real vector-string 1 by , where is the number of frequencies specified in the Polar pattern frequencies (Hz) parameters. The string represents the polar pattern magnitude measured at the corresponding frequency specified in Polar pattern frequencies (Hz). The directional pattern is measured in the azimuth plane. In the azimuth plane, the angle of place is 0° and the centre axis is 0° in azimuth and 0° in elevation. The polar pattern is symmetrical around the centre axis. Based on the polar diagram, you can construct the microphone’s directional pattern in three-dimensional space.

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

The antenna configuration specified as:

The number of elements for a ULA or UCA type array, specified as an integer greater than or equal to 2.

When the Specify sensor array as as to Replicated subarray parameter is set, this parameter is applied to each subarray.

Dependencies

To use this parameter, set the *Geometry parameters to ULA or UCA.

The distance between neighbouring elements of an array:

Dependencies

To use this parameter, set the Geometry parameters to ULA or URA.

The direction of the ULA linear axis specified as y, x or z. All elements of the ULA array are uniformly distributed along this axis in the local array coordinate system.

Dependencies

The size of the URA array, given as a positive integer or a 1 by 2 vector of positive integers.

For URA the array elements are indexed from top to bottom by the leftmost column of the array and then by the following columns from left to right.

Lattice of positions of URA elements specified as rectangular or triangular.

Dependencies

To use this parameter, set the Geometry parameter to URA.

The direction of normal to the lattice given as x, y or z.

Elements of planar arrays lie in a plane orthogonal to the selected array normal direction. The side view directions of the elements are directed along the normal direction.

Dependencies

To use this parameter, set the Geometry parameters to URA or UCA.

The radius of the array UCA given as a positive scalar.

Dependencies

To use this parameter, set the Geometry parameter to 'UCA'.

The positions of the elements of a conformal, given as a matrix of real values of dimension 3 by N, where N is the number of elements in the conformal array. Each column of this matrix represents the position ['x';'y';'z']of an array element in the array’s local coordinate system. The origin of the local coordinate system is (0,0,0). The units of measurement are metres.

Dependencies

To use this parameter, set the Geometry parameters to Conformal Array.

The direction of the normal vectors of elements in a conformal lattice, given as a 2-by-1 column vector or a 2-by-N matrix. N indicates the number of elements in the array. If the parameters are a matrix, each column specifies the direction of the normal of the corresponding element as [azimuth;elevation] with respect to the local coordinate system. The local coordinate system aligns the positive X-axis with the direction of the normal to the conformal lattice. If the parameter value is a 2-by-1 column vector, the same pointing direction is used for all array elements.

The parameters Element positions (m) and Element normals (deg) can be used to represent any arrangement in which pairs of elements differ by certain transformations. Transformations can combine translation, azimuth rotation, and elevation rotation. However, you cannot use transformations that require rotation with respect to the direction of the normal.

To use this parameter, set the Geometry parameter to Conformal Array.

The change of the directivity diagram of the antenna array elements is specified as a complex scalar or complex vector 1 at , where is the number of antenna array elements.

The coefficients that change the directivity pattern, also called element weights, multiply the responses of the antenna array elements. The coefficients change both the amplitude and phase of the response to reduce side lobes or the direction of the main response axis.

If the value of the Taper parameters is a scalar, the same weight is applied to each element. If Taper is a vector, then the weight from the vector is applied to the corresponding antenna array element. The number of weights must correspond to the number of antenna array elements.

Define a subarray selection as an M by N matrix. M is the number of subarrays and N is the total number of elements in the array. Each row of the matrix represents a subarray, and each entry in the row indicates when an element belongs to a subarray. If the entry is zero, the element does not belong to the subarray. A non-zero entry represents the complex-valued weight applied to the corresponding element. Each row must contain at least one non-zero entry.

The phase centre of each subarray is at the geometric centre of the subarray. The geometric centre of the subarray depends on the parameters Subarray definition matrix and Geometry.

Dependencies

To use this parameter, set the Specify sensor array as parameter to Partitioned array.

Subarray steering method specified as one of

Dependencies

To use this parameter, set the Specify sensor array as parameters to Partitioned array or Replicated subarray.

The operating frequency of the subarray rotary control phase shifters, specified as a positive real scalar. The units of measurement are hertz.

Dependencies

To use this parameters, set Sensor array to Partitioned array or Replicated subarray and set Subarray steering method to Phase.

Subarray steering phase shift quantisation bits of bits in phase shifters, set as a non-negative integer. A value equal to zero means that quantisation is not performed.

Dependencies

To use this parameters, set Sensor array to Partitioned array or Replicated subarray and set Subarray steering method to Phase.

Specify the layout of identical subarrays as Rectangular or Custom.

When setting this parameter to Rectangular, use the Grid size and Grid spacing parameters to position the subarrays.

When this parameter is set to Custom, use the Subarray positions (m) and Subarray normals parameters to place subarrays.

Dependencies

To use this parameter, set the Sensor array parameters to Replicated subarray.

Rectangular subarray grid size, specified as a single positive integer or as a 1 by 2 vector-string of positive integers.

If Grid size is an integer scalar, the array has an equal number of subarrays in each row and each column. If Grid size is a 1-by-2 vector of the form [NumberOfRows, NumberOfColumns], then the first entry is the number of subarrays in each column. The second entry is the number of subarrays in each row. A row is along the local y axis and a column is along the local z axis. The figure shows how you can reproduce a URA subarray of size 3 by 2 using a grid size of [1,2].

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Rectangular.

The distance between subarrays in a rectangular grid, given as a positive real scalar, a 1 by 2 vector of positive real values or `Auto'. The units of measure are metres.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Rectangular.

The positions of subarrays in the user grid, given as a 3-by-N real matrix, where N is the number of subarrays in the array. Each column of the matrix represents the position of one subarray in the local coordinate system of the array. The coordinates are expressed as [x; y; z]. The units of measurement are metres.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Custom.

Specify the directions of the subarray normals in the array. The value of this parameters is a 2 by N matrix, where N is the number of subarrays in the array. Each column of the matrix specifies the normal direction of the corresponding subarray in the form [azimuth;elevation]. The units of angles are degrees. Angles are defined relative to the local coordinate system.

The parameters Subarray positions and Subarray normals can be used to represent any arrangement in which pairs of subarrays are distinguished by certain transformations. The transformations can combine translation, azimuth rotation, and elevation rotation. However, you cannot use transformations that require rotation with respect to a normal.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Custom.