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OMEGA |
Global radio navigation system |
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OS |
Open service (Galileo) |
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OSD |
Office of the Secretary of Defense |
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P-code |
Precision code |
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PAD |
Flat surface in the integrated circuit used to make electrical |
|
contact soldering the bonding wire |
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PC |
Personal computer |
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PCB |
Printed circuit board |
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Signal detection probability |
|
|
Probability density function |
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False alarm probability |
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PFD |
Phase frequency detector |
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Input power |
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PLL |
Phase-locked loop |
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PMOS |
p-type channel metal-oxide semiconductor |
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PN |
Phase noise |
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PN-junction |
A junction formed by combining p-type and n-type |
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semiconductors |
|
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PNP |
Bipolar junction transistor type |
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Output power |
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ppm |
Parts per million |
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PPP |
Public-private partnerships |
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PPS |
Precise positioning service |
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PQFP |
Plastic quad flat pack |
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PRN code |
Pseudorandom noise code |
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PRS |
Public regulated services (Galileo) |
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PVT |
Position, velocity, and time |
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Q |
Spread spectrum processing gain adjustment factor |
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(dimensionless) |
|
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Q |
Quality factor |
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q |
Electronic charge |
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QPSK |
Quadrature phase-shift keying |
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QZSS |
Quasi-zenith satellite system |
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Base resistance |
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Bias resistor |
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RC |
Replacement code |
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Collector resistance |
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Chipping rate (chips/s) |
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Collector resistor |
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RC-code |
Replacement code |
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Emitter resistance |
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Emitter resistor |
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RF |
Radio frequency |
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RFIC |
Radio frequency integrated circuit |
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Load resistance |
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RLC network |
Network composed of at least a resistance, inductance, and |
|
capacitance |
|
|
RMS |
Root mean square |
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ROM |
Read-only memory |
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Rs |
Source resistance |
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S/N |
Signal-to-noise ratio (dB) |
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Signal-to-noise ratio (expressed as a ratio) |
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Sll |
Input port voltage reflection coefficient |
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S22 |
Output port voltage reflection coefficient |
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SA |
Standard accuracy (GLONASS) |
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SA |
Selective availability (GPS) |
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SAR |
Search and rescue |
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SAW |
Surface acoustic wave |
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SBAS |
Satellite-based augmentation system |
 |
Silicon germanium |
 |
Root mean square noise power |
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SNR |
Signal-to-noise ratio (dB) |
 |
Safety of life (Galileo) |
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SOLAS |
Safety of life at sea |
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SPP |
Serial port profile |
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SPS |
Standard positioning service (GPS) |
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SRAM |
Static random access memory |
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SSB |
Single-side band |
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StarFire |
Satellite-based augmentation and navigation system |
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StarFix |
DGPS system |
|
System 621B |
Satellite navigation system |
|
T |
Integration time for every cell before signal detection |
|
T |
Temperature |
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tbd |
To be defined |
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TFT |
Thin-film transistor |
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Timation |
Global radio navigation system |
|
TQFP48 |
48-pin thin quad flat pack |
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Transit |
Satellite navigation system |
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Tsikada |
Satellite navigation system |
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TTFF |
Time to first fix |
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UMTS |
Universal mobile telecommunications system |
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U.S. |
United States |
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USB |
Universal serial bus |
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UTC |
Coordinated universal time |
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Bias voltage |
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VCO |
Voltage-controlled oscillator |
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Power supply voltage |
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Gate-source voltage |
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VHF |
Very high frequency |
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Intermediate frequency voltage |
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Input voltage |
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Local oscillator voltage |
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VNA |
Vector network analyzer |
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Base-emitter shot noise |
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Collector emitter shot noise |
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Noise of the mixer converted to a voltage source at the input |
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Thermal noise of parasitic resistances |
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Noise generated within the source |
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Differential output voltage |
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VOR |
VHF omnidirectional radio range |
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Radio frequency voltage |
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VSWR |
Voltage standing wave ratio |
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Threshold voltage |
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Thermal voltage |
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W |
Transistor’s width |
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Resonance frequency |
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WAAS |
Wide area augmentation system |
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WAGE |
Wide area GPS enhancement |
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Open loop gain bandwidth (third-order filter) |
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Open loop gain bandwidth (second-order filter) |
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Unity gain frequency |
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Input impedance |
