Pulse or digital communications – Synchronizers
Patent
1993-12-09
1995-08-08
Chin, Stephen
Pulse or digital communications
Synchronizers
375358, H04L 700
Patent
active
054405947
ABSTRACT:
In digital transmission, the combination of transmitted pulse shape and receiver sampling time that maximizes the magnitude of the channel output pulse sample is determined. The transmitted pulse shape is represented as a linear combination of orthonormal functions. The coefficients that multiply each of the functions are determined by measuring at the receiver and transmitting back to the transmitter the response of the channel to each independently transmitted function at an approximation to the optimal sampling time. A pulse shape is formed using the calculated coefficients and is transmitted to the receiver where the timing of its maximum is determined, which represents a next approximation to the optimal sampling time. By repeating a plurality of times the processes of transmitting the functions, measuring at the receiver and transmitting back to the transmitter the responses at the approximation to the optimal sampling time, calculating the coefficients, transmitting a pulse, and determining a next approximation to the optimal sampling time from the timing of the maximum in the received pulse, the coefficients and optimal sampling time will converge.
REFERENCES:
patent: 4031317 (1977-06-01), McClain et al.
patent: 4249206 (1993-09-01), Appelbaum et al.
Members of the Technical Staff Bell Telephone Laboratories, Transmission Systems for Communications, Fifth Edition, 1982, pp. 1438-1444.
J. Lechleider, A New Interpolation Theorem with Application to Pulse Transmission, IEEE Transactions on Communications, vol. 39, No. 10, Oct. 1991, pp. 1438-1444.
R. Courant, D. Hilbert "Methods of Mathematical Physics," vol. 1, 1937, pp. 2, 49, John Wiley & Sons.
Bell Communications Research Inc.
Bocure Tesfaldet
Chin Stephen
Gurey Stephen M.
Suchyta Leonard Charles
LandOfFree
Method and apparatus for joint optimization of transmitted pulse does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for joint optimization of transmitted pulse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for joint optimization of transmitted pulse will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-977144