Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1996-01-19
1999-01-26
Chin, Stephen
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375355, 371 436, 371 46, H03M 1300, H04L 700
Patent
active
058645900
ABSTRACT:
A procedure for information transmission utilizing a system for reception of data signals using clock signals in which the phase shift between clock signals and data signals is calculated using a formulation of the gradient t.sub.n+1 =t.sub.n +p/q-.alpha.e.sub.n (t.sub.n)e'.sub.n (t.sub.n). The phase shift signal (t.sub.n+1) is calculated for an (n+1) data signal, the phase shift signal (t.sub.n) is calculated for a (.sub.n) data signal, and (p/q) in the ratio of the clock period to the data period. In addition, e.sub.n (t.sub.n) is the error between a real sample and an assumed theoretical value and e'.sub.n (t.sub.n) is the derivative of e.sub.n (t.sub.n) with respect to (t.sub.n).
REFERENCES:
patent: 5263033 (1993-11-01), Seshadri
IREECON '91, Australia's Electronics Convention Proceedings, vol. 2, Sep. 16-20, 1991, pp. 634-637, L. P. Sabel, "The Effect of Improved Signal Slope Estimation on the Performance of Symbol Timing Recovery for Digital Communications".
C.N. Georghiades, et al., "Sequence Estimation and Synchronization from Nonsynchronized Samples", IEEE Transactions on Information Theory, vol. 37, No. 6, Nov. 1991, (pp. 1649-1657).
K. Okanoue, et al., "A Fractionally Spaced MLSE Receiver Improving Degradation Caused by Sampling Phase Offset", Radio Communication System Research Meeting Report RCS 92-93, The Institute of Electronics, Information and Communication Engineers in Japan, Jun. 26, 1992, (pp. 71-76).
Ascheid, G., Oerder, M., Stahl., J., and Meyr, H., "An all Digital Receiver Architecture for Bandwidth Efficienct Transmission at High Data Rates," IEEE Transactions on Communications, vol. 37, No. 8, pp. 804-813, Aug. 1989.
"Thomson-CSF"
Chin Stephen
Gluck Jeffrey W.
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