Reference no: EM133104418
EE7330 Modern Radar Theory - Wright State University
Project - Find Target in Measured Data Due
Project Description - The Steering Vector Model
Write a one-page (or less) summary of the results. The summary must include the following graphic and table:
1. Choose one data file where the target is detected and submit a 2D range-Doppler map showing the target. Annotate the azimuth angle in degrees, range in km, Doppler frequency in Hz,
2. Construct a table of target location in range, Doppler, and azimuth for each data file. Specify which data file(s) has undetected targets.
Points will be deducted for poor graphics or table format, unscaled, improperly scaled or unlabeled axes. Note, project has a minimal amount of writing. The primary effort is in writing the code and the proof of success is in the one-page presentation.
Data description
1. Build the space-time steering vector according to the physical radar parameters listed below:
Azimuth element spacing dx is 0.10922 m. Elevation element spacing dz is 5.54 in or 0.14072 m. Transmit frequency Fo is 1240 MHz.
Pulse repetition frequency Fp is provided in the file as prf.
Range cells L the total number of range cells available to the radar processor is contained in the variable RangeCellsPerIPP.
Number of pulses M the number of pulses within the Coherent Processing Interval (CPI) is given by the variable IppsPerCpi. This abbreviation stands for "interpulse periods per CPI".
Number of azimuth channels N the 2D array is a rectangular array with 11 azimuth channels.
Number of elevation channels P the 2D array has 2 elevation channels.
CPI the complex signal data for the complete CPI and all array elements is contained in a matrix called CPI1. This matrix is of dimension
(RangeCellsPerIPP ∗ IppsPerCpi) × (NP + 2) .
2. The format of the matrix CPI1 matches what one would receive as the radar operated in real time. Each matrix column represents an antenna channel. There are 24 columns in the matrix as described below.
H Columns 1 and 9 represent the sum and difference channels of the array, respectively, and are not
The remaining columns are arranged such that every other column corresponds to a single az- imuthal row of the array. Hence, to pick off the upper row of the 2 11 array select columns as
Upper Row = 2 : 2 : 8 11 : 2 : 23 .
H Similarly, the lower azimuthal row of the array is given by
Lower Row = Σ3 : 2 : 7 10 : 2 : 24Σ .
A single column in the matrix represents one sample per range bin for all range bins in the CPI and all pulses in the CPI. Hence, there are ML samples in each column.
The first L samples represent the range cell returns for pulse 0. The second set of L samples represents the range cell returns for pulse 1. The data continues in this manner.
This data must be reformatted to the same format as the space-time snapshot. Item 6 reinforces the data structure established in class.
3. Once the CPI is formatted in a suitable manner, scan through it using the space-time steering vector. Hence, this operation will be a four-dimensional scan across azimuth, elevation, Doppler, and range. Given the small number of elevation elements, assume the target is at elevation θ = 0.
After scanning, the result should be a matrix of beamformed and Doppler filtered returns corresponding to the azimuth and Doppler bins you choose. The azimuth scan can be limited to φ = 90? because the array cannot sense returns from behind itself due to the aircraft fuselage.
4. From the azimuth-range-Doppler data, individual range-Doppler plots can be constructed for each azimuth angle "bin". Visually scan through these, perhaps using a pcolor plot for each one, to look for the highest return.
5. Only provide a single range-Doppler plot corresponding to where you think the target is located in azimuth. In the title of the plot, put the corresponding azimuth angle. Also, mark on the plot the target location. Once the target location is determined, provide 2 line plots. The first is a cut along Doppler for the target location in azimuth, elevation, and range. The second plot is along range for the target location in Doppler, elevation, and azimuth. All axis labels should marked appropriately with degrees, meters, or Hertz (un-normalize the Doppler).
6. The following equation is an explicit representation of the data format developed in class. The space- time snapshot and space-time steering vector (reference vector) have the same format.
7. The (pmn)-th element of the space-time snapshot data for the lth range cell is denoted as χlpmn(A). The format of the space-time snapshot vector for the MCARM data (p = 0, 1) is
Attachment:- Modern Radar Theory.rar