Digital phase demodulation and correlation

Details Digital phase demodulation and correlation Digital phase demodulation and correlation

1980-12-15

1983-10-25

Malzahn, David H.

Boots, shoes, and leggings

329112, G06F 1534

Patent

active

044123027

ABSTRACT:
A system for digitally detecting the energy content of a received analog signal of frequency f.sub.c. The system comprises signal means for generating sampling pulses of repetition rate 4 f.sub.c, a first two level signal of frequency 2 f.sub.c, whose successive level transitions occur near successive sampling pulses, a second two level signal whose successive level transitions occur near successive level transition of a first polarity of said first two level signal, and first and second interleaved trains of clock pulses each having a repetition rate 2 f.sub.c, and with each clock pulse occurring between the level transitions of successive half cycles of said first two level signal. Also provided are signal means responsive to said sampling pulses to obtain alternate I and Q samplings of said analog signal with each sampling comprising a magnitude component and a sign component. A multiplying means multiplies the sign component of each sampling by said second two level signal to produce a corrected sign signal. First and second accumulating means are each responsive to said corrected sign signal and are respectively responsive to said first and said second trains of pulses to accumulate, respectively, said I and Q samplings with a sign bit whose polarity is in accordance with said corrected sign signal.

REFERENCES:
patent: 3598979 (1971-08-01), Moreau
patent: 3670151 (1972-06-01), Lindsay et al.
patent: 3812493 (1974-05-01), Afendykiw et al.
patent: 3819919 (1974-06-01), McGunigle
patent: 3831013 (1974-08-01), Alsup el al.
patent: 3955197 (1976-05-01), Gutleber et al.
patent: 3956623 (1976-05-01), Clark et al.
patent: 4025775 (1977-05-01), Beauvais et al.
patent: 4112358 (1978-09-01), Ashida
patent: 4112497 (1978-09-01), Layland et al.
patent: 4168529 (1979-09-01), Tomlinson
patent: 4181967 (1980-01-01), Nash

Affiliated with

Also associated with

Rating

Digital phase demodulation and correlation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital phase demodulation and correlation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital phase demodulation and correlation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-715658