Appeal No. 1997-3850 Page 2
Application No. 08/355,973
transmission quality, is made by a simple calculation of the
ratio between a number of erroneous samples and a total number
of samples, this calculated ratio being inversely proportional
to the Eb/No ratio.
Representative independent claim 1 is reproduced as
follows:
1. A process for indirectly determining the Eb/No
ratio of a digital transmission, said process being applied to
a signal having a plurality of phases made up of two data
streams in phase quadrature providing in each symbol time a
received sample whose position in the constellation is defined
by its coordinates obtained by quantizing said data streams,
which process includes the steps of:
-determining the number of erroneous samples received
during a given time period whose coordinates correspond to
those of indicative samples, the coordinates of said indicative
samples being different from those of optimal samples received
under optimal transmission conditions; and
-calculating the ratio between said number of
erroneous samples and the total number of samples received in
said time period, the calculated ratio being inversely
proportional to said Eb/No ratio.
The examiner relies on the following references:
Birchler et al. [Birchler ‘582] 5,440,582 Aug. 8,
1995
Birchler et al. [Birchler ‘590] 5,440,590 Aug. 8,
1995
Claims 1, 5, 6, 10 and 11 stand rejected under 35 U.S.C.
102(e) as anticipated by Birchler ‘590. However, the examiner
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