Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
All Engineering Dictionary Terms
Definition of "sliding correlation" |
a principle of operation of a correlation receiver in channel measurement, where pseudo-random sequences are utilized. The transmitted signal consists of a carrier modulated (typically employing phase shift keying) by a pseudorandom sequence. The received signal is correlated (multiplied) by a similar reference signal, in which the pseudorandom sequence has a clock rate slightly lower than in the transmitted signal. The difference in clock frequencies causes the relative phase (chip position) of the pseudorandom sequences to slide by each other. The output of a sliding correlator is a time-scaled version of the autocorrelation function of the pseudorandom sequence. The time-scaling factor depends on the difference of the clock frequencies, and typically cannot be lower than 1000 without significant distortion in the resulting correlation function. This sets an upper bound to the rate of producing complete autocorrelation functions, making sliding correlation not ideally suited to measurement of channels with fast time variance. A sliding correlator must be implemented using analogue signal processing |
Please type any word or choose alphabet below... |
A
B
C
D
E
F
G
H
I
J
K
L
M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 0 |