Correlator and communication system using it

Details Correlator and communication system using it Correlator and communication system using it

1993-12-15

1996-07-23

Mai, Tan V.

Boots, shoes, and leggings

310313D, G06G 712

Patent

active

055396879

ABSTRACT:
A correlator includes a reference signal generating device for generating a reference signal with period T, n-convolvers each having an action time of T
where n is an integer of at least 2, into each of which an information signal and a reference signal are input and each of which outputs a convolution signal of the information signal and the reference signal, a delay device for delaying an information signal input into a k-th convolver among the n convolvers for a time of (k-1)T
where k=1, 2, . . . , n and for delaying a reference signal input into the k-th convolver for a time of (n-k)T
, and an adder for adding convolution signals respectively output from the n convolvers. A receiver includes such a correlator for outputting a correlation signal of a received information signal and a reference signal, and a decoding circuit for decoding data from the correlation signal output from the correlator. A communication system includes a transmitter for transmitting an information signal, and a receiver for receiving the information signal transmitted from the transmitter and having the correlator.

REFERENCES:
patent: 3675163 (1972-07-01), Hartmann et al.
patent: 3770949 (1973-11-01), Whitehouse et al.
patent: 4207546 (1980-06-01), Grudkowski
patent: 4224683 (1980-09-01), Adkins
patent: 5043620 (1991-08-01), Mitsutsuka
patent: 5164628 (1992-11-01), Egara et al.
patent: 5200663 (1993-04-01), Mochizuki et al.
patent: 5220230 (1993-06-01), Niitsuma
"Applications of Surface Acoustic Wave" by Shibayama, Television, 30, 457 (1976) pp. 457-463.

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