Designing transmitters for spectral conformity: power amplifier design issues and strategies

Baylis, Charles; Wang, L.; Moldovan, Matthew; Martin, Josh; Miller, Hunter; Cohen, Lawrence S.; Graaf, Jean de

doi:10.1049/iet-rsn.2010.0334

Cited by 22 publications

(5 citation statements)

References 3 publications

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“…Given that one may expect even greater distortion for tube amplifiers that achieve even higher powers, it can be inferred that high power radar systems may not be able to produce notch depths that completely avoid interference at all distances from the transmitter. That said, efforts involving hardware-in-the-loop waveform optimization [16,17] and waveform/transmitter co-design [18,19] could eventually address this limitation.…”

Section: Practical Considerationsmentioning

confidence: 99%

Analysis of Spectral Notching in FM Noise Radar Using Measured Interference

Ravenscroft¹,

Blunt²,

Allen³

et al. 2017

International Conference on Radar Systems (Radar 2017)

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It was recently shown that spectral notches can be incorporated into a physically realizable form of FM noise radar. Here it is shown how these spectral notches can be used to permit radar operation in a band where narrowband interference sources are present. The impact of interference and associated notches in different regions of the waveform spectrum (i.e. passband versus roll-off regions) is examined through assessment of the matched filter response when considering different receive power levels for the radar relative to measured interference. This assessment is performed for both simulated and experimentally measured notched waveforms.

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Section: Practical Considerationsmentioning

confidence: 99%

Analysis of Spectral Notching in FM Noise Radar Using Measured Interference

Ravenscroft¹,

Blunt²,

Allen³

et al. 2017

International Conference on Radar Systems (Radar 2017)

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“…As follow-on to addressing transmitter effects there arises the possibility to jointly design the transmitter hardware and associated waveforms [13]. Such a strategy is a departure from traditional design methodology in which either the transmit hardware is fixed with the waveforms modified to suit or a class of waveforms is defined and the system specifications determined to meet the requirements.…”

Section: E Co-design Of Transmitter and Waveformsmentioning

confidence: 99%

Challenge problems in spectrum engineering and waveform diversity

Griffiths

Blunt

Cohen

et al. 2013

2013 IEEE Radar Conference (RadarCon13)

141

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We describe and discuss some of the current challenges facing radar that result from continued spectral encroachment, which necessitating enhanced robustness to interference, agile waveform-diverse operation, and greater synergy between the signal processing and the physical radar/environment. Subsequently, specific research topics are suggested in which spectrum engineering and waveform diversity may yield viable solutions. In so doing, this paper also provides an introduction to the special session on radar spectrum engineering and waveform diversity affiliated with NATO Task Groups SET-182 and SET-179, respectively.I.

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“…Miettenen discusses multiple-objective optimization and provides examples from economics, mathematics, and engineering [15]. A similar situation requiring the use of Pareto analysis is the optimization of load reflection coefficient for linearity and efficiency [16–19] in power amplifiers. However, the power amplifier problem is a nonlinear optimization that must be performed sequentially.…”

Section: Introductionmentioning

confidence: 99%

Pareto optimization of radar receiver low-noise amplifier source impedance for low noise and high gain

Baylis

Marks

Cohen

2015

Int. J. Microw. Wireless Technol.

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In radar receivers, the low noise amplifier(LNA)must provide very low noise figure and high gain to successfully receive very low signals reflected off of illuminated targets. Obtaining low noise figure and high gain, unfortunately, is a well-known trade-off that has been carefully negotiated by design engineers for years. This paper presents a fundamental solution method for the source reflection coefficient providing the maximum available gain under a given noise figure constraint, and also for the lowest possible noise figure under a gain constraint. The design approach is based solely on the small-signal S-parameters and noise parameters of the device; no additional measurements or information are required. This method is demonstrated through examples. The results are expected to find application in design of LNAs and in real-time reconfigurable amplifiers for microwave communication and radar receivers.

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Designing transmitters for spectral conformity: power amplifier design issues and strategies

Cited by 22 publications

References 3 publications

Analysis of Spectral Notching in FM Noise Radar Using Measured Interference

Analysis of Spectral Notching in FM Noise Radar Using Measured Interference

Challenge problems in spectrum engineering and waveform diversity

Pareto optimization of radar receiver low-noise amplifier source impedance for low noise and high gain

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