Pulse or digital communications – Repeaters – Testing
Patent
1980-11-28
1984-03-27
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 39, 340347DD, H03K 1311
Patent
active
044398638
ABSTRACT:
A simple system is disclosed for detecting an 8 PSK (Phase Shift Keyed) - PRS (Partial Response System) signal output set, and other multi-level PSK and APSK (Amplitude and Phase Shift Keyed) - PRS signal sets. Quadrature interdependent channel decision feedback translates a reduced output signal set which is a scaled down version of the original full response input signal set before partial response filtering. The reduced output signal set has the same number of points and the same distribution array pattern as the input signal set. This enables the use of a conventional detector which need only detect the reduced signal set, not the complete output signal set. A decoder controls selection of predetermined interdependent signal value adjustments for each channel to translate the reduced output signal set in accordance with each successive signal relative to the then current signal value.
REFERENCES:
patent: 3388330 (1968-06-01), Kretzmer
patent: 3508153 (1967-09-01), Gerrish et al.
patent: 3706054 (1970-11-01), Starr et al.
patent: 4110691 (1978-08-01), Lender
patent: 4123710 (1978-10-01), Stuart et al.
patent: 4140974 (1979-02-01), Lindner
A. Lender, "The Duobinary Technique for High-Speed Data Transmission," IEEE Transactions on Communications & Electronics, May 1963, pp. 124-128.
E. R. Kretzner, "Generalization of a Technique for Binary Data Communication," IEEE Transactions on Communications Technology, Feb. 1966, pp. 67-68.
C. W. Anderson and S. G. Barber, "Modulation Considerations for a 91 Mbit/s Digital Radio," IEEE Transactions on Communications, May 1978, pp. 523-528.
J. Alexander, R. Cheung and T. Kao, "A Four Bits/Hertz Radio at 8 GHZ" International Conference on Communication (IEEE), 1979, pp. 5.7.1-5.7.5.
P. Kabal and S. Pasupathy, "Partial Response Signaling" IEEE Transactions on Communications, Sep. 1975, pp. 921-934.
A. M. Gerrish and R. D. Howson, "Multilevel Partial-Response Signaling," International Conference on Communications Record (IEEE) 1967, p. 186.
G. D. Forney, Jr., "Maximum Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interference," IEEE Transactions on Information Theory, May 1972, pp. 363-378.
C. R. Hogge, Jr., "Carrier and Clock Recovery for 8PSK Synchronous Demodulation", IEEE Transactions on Communications, Vo. Com.-26, No. 5, May 1978, pp. 528-533.
A. Lender, "Correlative Level Coding for Binary-data Transmission," IEEE Spectrum, Feb. 1966, pp. 104-109.
Chin Stephen
Griffin Robert L.
Hamann H. Fredrick
Rockwell International Corporation
Sewell V. Lawrence
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