DPCA Canceller

The propagation velocity of a signal as a real positive scalar.

System operating frequency, specified as a positive scalar.

The source of the PRF value specified as Property or Input port.

The pulse repetition frequency, PRF, specified as a positive scalar.

Set this parameter to the same value that is set in any library block used in the simulation Waveforms.

Dependencies

To enable this parameter, set the Specify PRF as parameter to Property.

Specify whether the positioning direction for the STAP processor block is determined by the block parameters or the AND input port.

The values of the Specify direction as parameters:

Specify the direction of the directional pattern of the antenna array of the antenna element as a 2 by 1 real vector. The direction is specified in the format [AzimuthAngle; ElevationAngle]. The azimuth angle must be in the range of -180° to 180°, and the elevation angle must be in the range of -90° to 90°.

Dependencies

To enable this parameter, set the Specify direction as parameter to Property.

Example: [100;-45].

The number of bits used to quantise the phase shift component of the beamformer or control vector weighting coefficients. Specify the number of bits as a non-negative integer. A value equal to zero means that quantisation is not performed.

Specify whether the target Doppler values for the STAP processor will come from the Targeting Doppler (Hz) parameters of this block or from the DOP input port.

The values of the Specify targeting Doppler as parameters:

Doppler positioning of the STAP processor, specified as a scalar.

Dependencies

Select this check box to receive beamformer weighting coefficients through the W output port.

Select this checkbox to output results before Doppler filtering.

Clear this check box to display the processing result after Doppler filtering.

The method of specifying the antenna array specified as Array (no subarrays).

A type of antenna or acoustic element specified as one of the following:

Specify the frequencies at which you want to set the frequency characteristics of the antenna and acoustic element as a vector of rows 1 to with increasing real values. The antenna or acoustic element has no response outside the frequency range specified by the minimum and maximum elements of this vector.

Dependencies

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

Frequency response of the user antenna or user acoustic element for frequencies defined by the Operating frequency vector (Hz) parameters. The dimensionality of Frequency responses (dB) must match the dimensionality of the vector defined by the Operating frequency vector (Hz) parameters.

Dependencies

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

The user antenna pattern coordinate system, specified as az-el or phi-theta.

Dependencies

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

Specify the azimuthal angles by which the antenna radiation pattern is calculated as a vector of lines 1 to . The azimuthal angles must be greater than 2. The azimuthal angles must lie between -180° and 180°, inclusive, and must be in strictly ascending order.

Dependencies

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

Specify the elevation angles at which the radiation pattern will be calculated as vector 1 at . must be greater than 2.

The elevation angles must lie in the range from -90° to 90° inclusive and be in strictly ascending order.

Dependencies

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

Phi-angles of the points where the antenna radiation pattern is specified are specified as a real vector 1 at . must be greater than 2.

Phi-angles must lie in the range from 0° to 360° and be arranged in strictly increasing order.

Dependencies

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

Theta angles of the points where the antenna radiation pattern is set are set as a real vector 1 at . must be greater than 2.

The Theta angles must lie in the range from 0° to 360° and be arranged in a strictly increasing order.

Dependencies

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

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

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

Dependencies

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

Combined antenna radiation phase diagram specified as a matrix to or an array to to .

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

Dependencies

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

Select this check box to rotate the antenna element pattern according to the array normal. If the check box is not selected, the element pattern is not rotated.

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

Dependencies

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

The response frequencies of a polar pattern acoustic element, specified as a real scalar or vector 1 at . The response frequencies lie within the frequency range specified by the Operating frequency vector (Hz).

Dependencies

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

Specify the response angles of the polar radiation pattern as vector 1 at . The angles are measured from the centre axis of the acoustic element and should be between -180° and 180° inclusive.

Dependencies

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

Specify the polar response value of a custom acoustic element as a matrix at . - is the number of frequencies specified in Polar pattern frequencies (Hz). - is the number of angles specified in Polar pattern angles (deg). Each row of the matrix represents the polar pattern magnitude measured at the corresponding frequency specified in Polar pattern frequencies (Hz) and all angles specified in Polar pattern angles (deg).

The pattern is measured in the azimuth plane. In the azimuth plane, the elevation angle is 0°, and the centre axis of capture is 0° deg in azimuth and 0° deg in elevation. The radiation pattern is symmetrical around the centre axis. Based on the polar radiation pattern, you can plot the radiation pattern of an acoustic element in three-dimensional space.

Dependencies

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

Specify the operating frequency range of the antenna or acoustic element as a 1 by 2 vector in the form [LowerBound,UpperBound]. The element has no response outside this frequency range.

Dependencies

To enable this parameter, set the Element type parameters to Isotropic Antenna, Cardioid Antenna, Cosine Antenna, Gaussian Antenna, Sinc Antenna or Omni Microphone.

Frequency units: `Hz

Angles of the directional pattern solution in degrees.

Dependencies

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

The direction of the zero emission axis.

Dependencies

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

Exponents of cosine pattern 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 in the azimuth direction and the second element is the exponent in the elevation direction. When this parameters is scalar, the cosines in the azimuth and elevation directions are raised to one degree.

Dependencies

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

Select this check box to blank out the element’s backward response. With a reverse deflector, the responses at all azimuth angles greater than 90° from the broadside are set to zero. The broadside is defined as 0° of azimuth angle and 0° of elevation angle.

Dependencies

To enable this checkbox, set the Element type parameters to Isotropic Antenna or Omni Microphone.

Specify the type of antenna elements of the antenna array as one of the following:

The number of array elements for ULA arrays, specified as an integer greater than or equal to two.

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

Dependencies

To enable this parameter, set the Geometry parameter to UCA.

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

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

In this figure, the value [3,2] of the Array size parameter creates an array with three rows and two columns.

Dependencies

To enable this parameter, set the Geometry parameters to URA.

The distance between neighbouring ULA elements, given as a positive scalar.

Example: 1.5

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

Dependencies

A lattice of URA element positions, specified as Rectangular or Triangular.

Dependencies

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

The normal direction of an array, specified as x, y, or z.

Elements of planar arrays lie in a plane orthogonal to the selected array normal direction.

The element sighting directions are specified along the array normal direction:

Dependencies

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

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

The units of measurement are m.

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

Dependencies

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

The direction of vectors of normal vectors of elements in a conformal array, given as a vector-column 2 by 1 or a matrix 2 by N. N indicates the number of elements in the array. For a matrix, each column specifies the direction of the normal of the corresponding element in the form [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 array.

If the parameters value is a 2 by 1 column vector, the same direction is used for all array elements.

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

You can use the parameters Element positions (m) and Element normals (deg) to represent any arrangement in which pairs of elements 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 the direction of the normal.

Dependencies

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

The taper of an element, given as a complex scalar or complex vector of rows 1 by _N. In this vector, N represents the number of elements in the antenna array.

Also known as weighting coefficients, cones multiply the responses of the elements of an antenna array. The cones change the amplitude and phase of the response to reduce side lobes or to direct the main axis of the response.

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