Signal correlation means employing charged-coupled device type s

Details Signal correlation means employing charged-coupled device type s Signal correlation means employing charged-coupled device type s

1980-07-25

1983-01-25

Gruber, Felix D.

Boots, shoes, and leggings

364728, G06F 1534

Patent

active

043707262

ABSTRACT:
A system for correlating a sampled received analog signal against a sampled reference waveform which is approximated by three quantized levels. The three levels are organized to minimize undesirable odd harmonics with the reference and to maximize the correlator output signal-to-noise ratio. The invention comprises first and second signal summers and first, second and third registers each having M corresponding stages and logic for generating and entering into the first, second and third registers, respectively, a quantized form of the received signal, at least one two-level reference signal, and at least one two-level enable signal corresponding to the at least one two-level reference signal. Further logic responds to the contents of corresponding single stages of the second and third registers to supply the sampled contents of the corresponding stage of the first register to the first signal summer when the corresponding single stages of the second and third registers both contain first logic level signals, to gate the sampled contents of the second signal summer when the corresponding single stages of the second and third registers contain second and first logic level signals, respectively, and to gate the sampled contents to neither signal summing means when the corresponding stage of the third register contains a second logic level signal.

REFERENCES:
patent: 3987292 (1976-10-01), Means
patent: 4088960 (1978-05-01), Osborne
patent: 4097844 (1978-06-01), Moyer
patent: 4100378 (1978-07-01), Claasen et al.
patent: 4120035 (1978-10-01), Cases et al.
patent: 4161033 (1979-07-01), Martinson
patent: 4224679 (1980-09-01), Nossen et al.
patent: 4295204 (1981-10-01), Sunstein

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