Satellite Communications Payload and System

Abbreviations

°	Convolution
*	Complex conjugation
≈	Is approximately equal to
	Is defined as
	Is much less than
	Is much greater than
∝	Is proportional to
ϕ(f)	Phase of transfer function in radians, a function of frequency f; also called “phase response”
ϕ	Azimuth angle in spherical coordinates
σ	Standard deviation
θ	Polar angle in spherical coordinates
θ(t)	Signal phase in radians as a function of time t
8PSK	8-ary phase-shift-keying
16QAM	16-ary quadrature amplitude modulation
AC	Alternating current
ADC	Analog-to-digital converter
A/D	Analog-to-digital converter
A(f)	Signal-amplitude multiplication function of a filter as a function of frequency f; called for shorthand the “amplitude function” of the filter
AIAA	American Institute of Aeronautics and Astronautics, Inc.
ALC	Automatic level control
A-to-D	Analog-to-digital (converter)
AWGN	Additive white Gaussian noise
B	Bandwidth in Hz
BER	Bit error rate
BFN	Beam-forming network
BL	Loop bandwidth (one-sided baseband) of phase-locked loop
BOL	Beginning of life
BPF	Bandpass filter
BPSK	Binary phase-shift-keying
C	Carrier or signal power in a given bandwidth
CAMP	Channel amplifier ...