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Principles of Modern Radar - Volume 2 1891121537

Principles of Modern Radar - Volume 2 1891121537

Principles of Modern Radar - Volume 2 1891121537

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12.1 Introduction 531c speed <strong>of</strong> light = 3 × 10 8 m/sd j jammer duty factorF radar receive noise factorf c radar carrier frequencyf D Doppler frequencyf p radar pulse repetition frequency (PRF)g j,el jammer electronic gain between receive and transmit antenna portsG j,rx jammer receive antenna gain at the radar transmit polarizationG j,tx jammer transmit antenna gain at the radar receive polarizationG r radar receive antenna gainG rj radar receive antenna gain toward jammerG t radar transmit antenna gainG tj radar transmit antenna gain toward jammerJ jammer power (or energy) in radar detection bandwidthk Boltzman’s constant = 1.38 × 10 −23 joules/KL s radar system losses (defined ≥ 1)N thermal noise powern number <strong>of</strong> radar pulses coherently integratedP j jammer peak transmit powerP r radar peak received powerP t radar peak transmit powerR range from radar to targetR j range from radar to jammerS signal power (or energy) received from a target returnT reference noise temperature (typically 290 K)T cpi radar coherent processing interval (CPI) timev velocity (radial velocity or range rate) monopulse difference pattern or received voltageλ radar wavelength monopulse sum pattern or received voltageσ target radar cross sectionτ radar pulse width12.1.4 AbbreviationsKey abbreviations used in this chapter are defined in the following list.Abbrev. DefinitionADC analog-to-digital converterAGC automatic gain controlAM amplitude modulationARM antiradiation missileBBN blinking barrage noiseBN barrage noiseBSN blinking spot noiseCBN cooperative blinking noiseCFAR constant false alarm rateCONSCAN conical scan

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