Registers – Transfer mechanism – Traveling pawl
Patent
1975-10-01
1976-11-16
Gruber, Felix D.
Registers
Transfer mechanism
Traveling pawl
178 66A, 325320, 329104, G06G 719, H04L 2714
Patent
active
039926176
ABSTRACT:
The MSK signal is distributed to eight choppers, each of which also has coupled thereto a different sum or difference cosine or sum or difference sine chopping signal. The output signals from the choppers are summed in selected pairs in summers whose output signals are integrated over a predetermined number of unit time intervals. Coupled between four of the summers and four of the associated integrators there is an integrated time selector which enables adjusting the integrator output for different baud rates of the MSK signal input. The output signals of the integrators are coupled in pairs of multiplexers whose output signals in turn are coupled to sample and hold circuits. The output signals of the sample and hold circuits are coupled to another multiplexer whose output signal is coupled to an analog-to-digital converter to provide the data carried by the MSK signal in digital form. The correlator will provide an output from the analog-to-digital converter at a steady rate of two correlation coefficient values per unit interval for a given baud rate.
REFERENCES:
patent: 3743775 (1973-07-01), Hutchinson et al.
Mengali: Phase Noncoherent Reception of Binary FSK Signals, IEEE Transitions on Communication Technology, Feb. 1971, vol. COM-19, No. 1 pp. 85-88.
B498,775; 3-1976 Balcewicz Minimum Shift Keying Communication System.
Gruber Felix D.
Hill Alfred C.
International Telephone and Telegraph Corporation
O'Halloran John T.
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