George W. Stimson introduction to Airborne Radar (Se)
Подождите немного. Документ загружается.
INDEX
Index Terms Links
583
This page has been reformatted by knovel to provide easier navigation.
O
Optical processing, SAR 399
OR gate 538
P
P-channel MOSFET 539
Parabolic-reflector antenna 16 95
Passive ESA 474 556
Passive ESA design 556
air (power)strip line 486
corporate feed 485
dielectric strip line 486
selection of phase shifters 485
space feed 486
traveling-wave feed 485
waveguide 487
Passive lobing ECCM 462
Passive ranging:
angle rate 459
triangulation 460
PE (processing element) 536 537
Pencil beam 8
Phase:
correction 410
definition of 58
rotation 279
Phased array antenna (ESA) 473
Phasor illustration of:
a signal 59
amplitude modulation 64
frequency translation 63
image-frequency creation 64
scintillation 62
sidebands, creation of 65
signal combination 61 62
the complex variable 69
Phenomenology model (phenom) 497
Phoenix missile 43
INDEX
Index Terms Links
584
This page has been reformatted by knovel to provide easier navigation.
Photonic TTD implementation:
BIFODEL 513
brute-force approach 512
direct-modulation, laser diode 511
external modulation, CW laser 514
hybrid implementation 515
optical fiber 511
switchable fiber-optic delay lines 513
wavelength-division multiplexing 513
Pipeline:
gate arrays (AWAX) 548
processing 536
Pixel 393
Planar array antenna 28
Power management 528
Power supply 22 552
PPI display 21
Precision strategic bombing 45 557
Precision velocity update (PVU) 38 44
PRF:
basic categories of 329
choice of 325
defined 4 110
interleaving 379
jittering, ambiguity resolution 155
jittering, ECCM application 461
switching 156
PRI (pulse repetition interval) 110
Processor architecture:
advanced developments 543
approaches to clustering 540 541
CMOS technology 539
COTS hardware 541
distributed processing 536
fault tolerance 541
gate arrays 537
integrated processing 542
INDEX
Index Terms Links
585
This page has been reformatted by knovel to provide easier navigation.
Processor architecture (Cont.):
logic gates 538
modular design 540
pipeline processing 536
software for 544
throughput growth 535
VLSIs, types used 537
Processor developments:
cooling options 543
higher clock rates 543
higher density gate arrays 543
massive parallel processing 544
Proximity fuses 45
Pulse compression:
advantage of 163
Barker codes 172
binary phase modulation 169
chirp 163
complimentary Barker codes 172
incremental frequency modulation
164
phase coding, limitations of 173
polyphase codes 174
range, sidelobes 165 172
ratio, for chirp 167
stretch radar decoding of chirp 165
Pulse length 109
Pulse width 109
Pulse-delay ranging:
ambiguous return, eliminating 155
basic technique 6 151
ghosts, eliminating 157
in pulse-doppler radars 152
in simple analog radars 152
maximum unambiguous range 154
number of PRFs required 159
INDEX
Index Terms Links
586
This page has been reformatted by knovel to provide easier navigation.
PRF switching 156
range ambiguities 153
ranging times 152
Pulse-doppler radar (generic) 25
Pulsed operation:
advantages of 107
average power 113
duty factor 113
interpulse modulation 109
interpulse period 110
peak power 111
pulse length 109
pulse repetition frequency (PRF) 110
pulse repetition interval (PRI) 110
pulse width 109
spectral lines 110
transmitted energy 15
waveform 108
Pulsed radar (generic) 15
Pulsed radar, shortcomings 24
Q
Quantization noise 250
R
Radar beacon system 37
Radar cross section (RCS) 122 123 142
Radar warning receiver (RWR) 472
Radiation pattern:
basic types 8
cosecant squared 106
ground mapping, requirements 106
for linear array, calculation of 105
Radio waves:
direction and propagation 52
frequency 56
intensity 55
period 57
phase 58
INDEX
Index Terms Links
587
This page has been reformatted by knovel to provide easier navigation.
Radio waves (Cont.):
polarization 53
speed 52
wavelength 56
Raid assessment (raid mode) 42 551 553
Range:
bin 152
gate 23 152 384
Range equation 135
antenna trained on target 136
beam-shape losses 137
blip-scan ratio 143
computing the range 147
cumulative detection probability 147
detection probability 142
detection threshold, setting of 145
effects of varying parameters 138
false-alarm probability 143
false-alarm rate/time 143
many forms of 148
non-doppler radars 136
omissions from 137
RCS fluctuations, effect of 142
SNR =1 138
single scan of antenna, for 136
single-look probability of detection
143
Swerling curves 146
volume search 140
Range-rate measurement:
doppler method 283
doppler ambiguities, potential 284
range differentiation method 281
resolving doppler ambiguities 286
Range sidelobes 165 172
Range sweep 20
Range trace 20
INDEX
Index Terms Links
588
This page has been reformatted by knovel to provide easier navigation.
Range tracking:
discriminant 385
gate 385
loop 384
Range zones 312
Rapid relock, ECCM 462
RDR-4B weather radar 560
Receiver:
pulse-doppler radar, for 28
pulsed radar, for 17
protection device 17
Reflection, of radio waves 54
Refraction, of radar waves 54
Repeater:
false target generation 447
retrodirective 449
velocity-bin masking 445
Resolving I and Q components 67
RISC microprocessor 537
Rotodome 547 548
S
SAR:
basic concepts 403
doppler processing 419
rotations required 420
focused array 410
line-by-line processing 404
unfocused array 404
doppler processing 415
SAR design:
choice of PRF 425
doppler ambiguities, avoiding 420
grating lobes, avoiding 427
motion compensation 429
phase errors, limit on 430
sidelobes, minimizing 428
INDEX
Index Terms Links
589
This page has been reformatted by knovel to provide easier navigation.
SAR modes:
doppler beam sharp (DBS) 434
inverse SAR (ISAR) 435
moving target display 434
multilook mapping 432
spotlight 13 433
squinted array 432
strip map 404 414
Search scan 5 474
Sequential detection:
alert-confirm 506 551
track before detection 506
Semi-active-missile guidance 43
Sensitivity time control 337
Serrodyne modulation 446
Sidebands 65
Sidelobe clutter 299
Signal processor, programmable 29 535
Silent lobing 462
SIMFAR 500
Simultaneous SAR/GMTI 554
Simultaneous transmission/reception 501
Sine theta space 484
Sine-x-over-x shape 93
Single target tracking:
concept 22 383
discriminant 384
filtering 383
tracking loop 383
range tracking 384
doppler (range-rate) tracking 386
angle tracking 386
Situation awareness modes 503 523 553
SLAR real-beam mapping 39 399
INDEX
Index Terms Links
590
This page has been reformatted by knovel to provide easier navigation.
Small-target detection:
bistatic target 507
conventional refinements 505
long coherent integration time 504
sequential detection 506
Snapback ECCM 462
Space feed 486
Space stabilization, antenna 24 387
Space-time adaptive processing 509
Sparrow missile 43 552 553
Spectral lines 110
Spectrum of a pulsed signal:
bandwidth 200
effect of coherence on 202
line width vs. length of pulse train
204
mathematical derivation of 225
spectral lines, what they represent 218
spectral sidelobes 206
Squinted-array, SAR mode 432
Stabilized search scan 22
STAR 501
Stealth, meeting requirements for 30
Straight-through repeater 445
Stretch radar 165 166
Stripline 486
Superheterodyne receiver 17 28
Swerling curves 146
Synchronizer 15
Synchronous detector 28
T
Tactical-missile targeting 43 558
Target identification 42
Terrain avoidance mode 38 553 556
Terrain avoidance mode 38 553 556
Terrain contour mapping (TERCOM) 38
Terrain following mode 38 556
Terrain mapping applications 39
INDEX
Index Terms Links
591
This page has been reformatted by knovel to provide easier navigation.
Test and maintenance (TM)bus 540
Three-D SAR (see InSAR)
Threshold detector 29
TIER II Plus 542 546
Track-while -scan (TWS):
basic steps in 388
correlation 388
definition 388
filtering 389
gate formation 390
preprocessing 388
track creation and deletion 389
Traffic collision avoidance system 37 559
(TCAS)
Transponder, false target generation 446
Transponder, radar beacon 36
Traveling-wave feed 485
True-time-delay beam steering
(TTD):
basic concept 511
potential applications 515
problem of affordability 512
TWT:
dual mode, operation 551
gridded 26
transmitter implementation 27
U
UAV 542 546
V
Velocity (doppler)tracking:
discriminant 386
gate 386
loop 386
Velocity-gate pull-off 462
Video:
detection 17 28
signal 20
INDEX
Index Terms Links
592
This page has been reformatted by knovel to provide easier navigation.
W
W (complex operator) 271
Wave guide, hollow:
metal 16 487
plastic 487
Weather, mapping 36 559 560
Windshear warning 36 559 560