11.2 Consider the case of a pulsed radar at RF of 9.4 GHz that is being jammed b
ID: 2084622 • Letter: 1
Question
11.2 Consider the case of a pulsed radar at RF of 9.4 GHz that is being jammed by a broadband jammer covering the bandwidth from 9.0 to 10.0 GHz with uniform random noise. If the radar has a 20 MHz bandwidth preselect filter, what is the potential reduction in jammer power due to the preselect filter?
Answer: 50x, or 17 dB
12.1(a) Determine the total phase noise spectral density, in dBc/Hz, at an offset frequency of 12 kHz, without the effects of self-coherence, using the following parameters: Assume the phase noise is at the minimum level at frequencies above the PRF. s(12 kHz)= 100 dBc/Hz- smin= 117 dBc/Hz Receiver bandwidth = 1.2 MHz Radar PRF = 24 kHz Clutter cell distance = 1.0 km
Answer a) -94 dBc
Explanation / Answer
For pulsed radar at radio frequency of 9.4gh that is being jammed by a broadband jammer covering and bandwith from the given frequency of 10 ghz with uniform random noise we have a 20 mhz bandwidth preselect filter the potential reduction in jammer power due to the preselect filter is given by the 50X OR 17 decibles
the total phase noise spectrial density was given by -94dbc for the given radio frequency of the minimum level at frequencies of the cultter cell distance of 1.0km of the offset freqeuncy.
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