KEYWORDS: Radar, Signal processing, Interference (communication), Human-machine interfaces, Analog electronics, Signal generators, Radar signal processing, Clocks, Control systems, Linear filtering
The approach, when the waveforms of different types are exploited in the same radar (waveform diversity) requires new-generation sources of initial signals. For generating of different types of waveforms in the same radar we suggest using
Arbitrary Waveform Generator, that allows output any type of pre-programmed signal in real time. We have carried out
preliminary experimental tests of the stepped-delay mode of UHF-band radar evaluation kit. The series of experimental
testing shows efficiency AWG application in radar with variety of sounding waveforms.
KEYWORDS: Radar, Signal processing, Interference (communication), Digital signal processing, Radar signal processing, Analog electronics, Signal generators, High dynamic range imaging, Optical correlators, Target detection
Conventional digital signal processing scheme in noise radars has some limitations related to combination of high
resolution and high dynamic range. Those limitations are caused by a tradeoff in performance of currently available
ADCs: the faster is ADC the smaller is its depth (number of bits) available. Depth of the ADC determines relation
between the smallest and highest observable signals and thus limits its dynamic range. In noise radar with conventional
processing the sounding and reference signals are to be digitized at intermediate frequency band and to be processed
digitally. The power spectrum bandwidth of noise signal which can be digitized with ADC depends on its sampling rate.
The bandwidth of radar signal defines range resolution of any radar: the wider the spectrum the better the resolution.
Actually this is the main bottleneck of high resolution Noise Radars: conventional processing doesn't enable to get both
high range resolution and high dynamic range. In the paper we present a way to go around this drawback by changing
signal processing ideology in noise radar. We present results of our consideration and design of high resolution Noise
Radar which uses slow ADCs. The design is based upon generation of both probing and reference signals digitally and
realization of their cross-correlation in an analog correlator. The output of the correlator is a narrowband signal that
requires rather slow ADC to be sampled which nowadays may give up to 130 dB dynamic range.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.