Method and device for measuring the successive amplitude levels

Details Method and device for measuring the successive amplitude levels Method and device for measuring the successive amplitude levels

1992-12-17

1994-09-27

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 20, 375 94, 375106, 4552261, 371 54, 341 56, H04L 702

Patent

active

053512715

ABSTRACT:
Measurement of the successive levels of a received signal is achieved by combining together the elements of groups of digitized samples (E1 to Em) which are taken from the signal during successive sampling windows (W) positioned by a local clock (H) kept thoroughly synchronous with the signal. The combination consists of a weighted average so as to take account of the transmission conditions: passband of the channel, required flow rate, background noise, etc, likely to distort the signals transmitted and therefore to lead to errors in the measurement of the actual levels thereof. Such weighting is achieved by using the set of digital samples (E1 to Em) corresponding to a single group, for addressing a memory (10) in which the values to be selected for each one of the digital words have been previously stored.

REFERENCES:
patent: 3754237 (1973-08-01), de Laage de Meux
patent: 3913093 (1975-10-01), De Vincentiis et al.
patent: 4313194 (1982-01-01), Maitre et al.
patent: 4628297 (1986-12-01), Mita et al.
patent: 5216697 (1993-06-01), Ohnuki
patent: 5230008 (1993-07-01), Duch et al.
Patent Abstracts of Japan, vol. 7, no. 107, 11 May 1983 & JP-A-58-029 226 (Nippon Denki K.K.) 21 Fevrier 1983 -Abrege-.
IEEE 1986 Region 5 Conference Proceedings, 8-11 Avril 1986, New York, US, R. R. Henry; `An Improved Receiver System for Asynchronous Communication Sysytems`, pp. 129-134; FIG. 2-4.

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