wireless network config

8/10/2019 wireless network config

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RESULT

Part A

Line Replaceable Unit Features

Antenna Width (m) and Height (m) can be

varied, and will affect the Antenna Gain (dB)

and3dBBeamwidth (Az). Antenna Switch Loss (dB) and Plumbing Loss

(dB) will affect the Maximum Effective Range

of the radar.

Scan Width (Degrees) determines the azimuth

extent of both the simulator scan, and the

Range Markers.

Scan Speed (Deg/sec),in conjunction with

Beamwidth, and PRF, determines the number

of Hits per Scan of the radar.

The Antenna Type option buttons allow you to

select one of three types of antenna -Parabola, Cassegrain or Phased Array. Each

one has its own Antenna Efficiency (%), and

1st Sidelobe level.

The (azimuth) Scan Type is dependant on the

Antenna Type, with Cassegrain and Parabolic

antennas only being capable of Mechanical

scanning, whereas a Phased Array scan can be

Transmitter

Synchronizer

Receiver

Control Unit

Antenna


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Electronic or Mechanical.

Once the antenna type has been selected, and

the parameters entered into the white text

boxes, press the Calculate button to update

the grey (computed) fields.

The Transmitter is basically an RF poweramplifier, which boosts the power level of the

signal generated in the Synchronizer/Exciter.

Peak Power, in conjunction with the Pulse

Width (PW) and Pulse Recurrence Frequency

(PRF) affects the Mean Power level. The value

entered for Peak Power is automatically

transferred to the Blake Chart, to assist with

computation of the Effective Maximum Range

of the radar.

With Pulse Compression Coding selected to

'None' the PRF and PW values entered here

are used to calculate the Duty Cycle, and (in

conjunction with Peak Power) Mean Power.

The PW determines the Range Resolution and

the RF Bandwidth requirement of the radar.

The Carrier Frequency determines the RF

Wavelength.

PW and RF Wavelength are automatically

transferred to the Blake Chart to aid

computation of the Maximum Effective Range

of the radar. Once a suitable set of values have

been determined, they can be entered into

one of the Range Settings in the CDU Form foruse in the Simulator.

When Pulse Compression Coding is set to

either 'Barker' or 'Linear FM', the Range

Resolution (m) and optimum Receiver RF

Bandwidth (MHz) are modified by the value of

the selected coding scheme.

The effective Compressed Pulse Width (s)and

the Processing Gain (dB) are also calculated.

For Barker (phase) coding, there are four

selectable values (5, 7, 11 and13) for the

number of 'bits' in the pulse. For Linear FM, the Deviation can be set

anywhere between 0.1MHz and 10MHz.

However, if the Deviation is set at a value less

than the reciprocal of the uncompressed pulse

width, no processing gain or resolution

enhancement will be obtained.


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The Receiver Noise Factor (dB), IF Bandwidth

(MHz) and Rx Temperature all combine to

determine the Rx Noise Level (dBm).

The Rx Gain (dB) and Rx Threshold (V), in

conjunction with the Rx Noise Level (dBm),

determine the Threshold/Noise Ratio (dB) forthe radar. This is, for practical purposes, the

same as the minimum signal/noise ratio for

the radar.

The Probability of False Alarm (Pfa) shown

here is based on the T/N Ratio.

Various Signal Processing options such as

IAGC, CFAR, FTC, and STC can be enabled in

the Simulator by checking the appropriate box.

The Gain Type for the radar can be set to

Linear or Logarithmic. In either case, the

Receiver amplifiers saturate at a signal level of

10V.

This Form allows the user to enter four sets of

values of PRF (kHz), PW (s) and Maximum

Range (km) for use in the Simulator.

Pulse Compression can also be selected on

Ranges 3 and 4.

The Simulator Display Type can be selected to

either Sector Scan or B Type.

An A-Scope display is permanently available on

the Simulator.

Range Markers and a Freeze Button can be

enabled on the Simulator by checking theappropriate boxes on this Form.

Once all of the characteristics have been

entered, select accept values to transfer them

to the PREP Simulator database.


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Part B

1.

Height=1, Width=1

Ae Azimuth


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Ae Elevation

Ae 3D Plot


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Height=1, Width=15

Ae Azimuth

Ae Elevation


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Ae 3D Plot


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Height=1, Width=30

Ae Azimuth

Ae Elevation


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Ae 3D Plot


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Width=1, Height=1

Ae Azimuth

Ae Elevation


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Ae 3D Plot


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Width=1, Height=15

Ae Azimuth

Ae Elevation


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Ae 3D Plot


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Width=1, Height=30

Ae Azimuth

Ae Elevation


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Ae 3D Plot


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2.

Synchronizer width=1, Control Unit=1


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3.

Object 1 2

Position

-35o 55

o

7km 16km

Size 5m2 15m

2

wireless network config

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