List of Abbreviations

a.e. = almost everywhere

ACS = almost cyclostationary

AP = almost periodic

CDMA = code-division multiple access

DFS = discrete Fourier series

DFT = discrete Fourier transform

DSSS = direct-sequence spread-spectrum

DT-CCC = discrete-time cyclic cross-correlogram

fBm = fractional Brownian motion

FOT = fraction-of-time

FRESH = frequency shift

GACS = generalized almost-cyclostationary

H-CCC = hybrid cyclic cross-correlogram

LAPTV = linear almost-periodically time-variant

lhs = left-hand side

LTI = linear time-invariant

LTV = linear time-variant

MIMO = multi-input multi-output

MMSE = minimum mean-square error

PAM = pulse amplitude modulated

pdf = probability density function

QTI = quadratic time-invariant

RCS = radar cross-section

rhs = right-hand side

RX = receiver

SC = spectrally correlated

SCD = spectral correlation density

STFT = short-time Fourier transform

t.m.s.s. = temporal mean-square sense

TX = transmitter

w.a.p. = weakly almost periodic

w.p.1 = with probability 1

w.r.t. = with respect to

WSS = wide-sense stationary