Pulse or digital communications – Repeaters – Testing
Patent
1988-06-07
1990-02-27
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
371 43, 375 94, 375101, H04B 306
Patent
active
049052543
ABSTRACT:
An arrangement for combating intersymbol interference and noise, which are introduced into a data signal (a.sub.k) transmitted at a symbol rate 1/T by a dispersive transmission channel (CH), comprises an adaptive equalizer (EQ) with a symbol detector (ID) for forming tentative symbol decisions (a.sub.k) as well as a post-detector (PD) for forming final symbol decisions (a.sub.k-M) using an auxiliary signal which is derived from the transmitted data signal (r.sub.k) at the input of the arrangement. By using a priori knowledge of the main character of the transfer characteristic of the transmission channel (CH) and by using as an auxiliary signal for the post-detector (PD) the input signal (a.sub.k) of the symbol detector (ID) in lieu of the transmitted data signal (r.sub.k), this post-detector (PD) can be arranged in a non-adaptive and thus simpler way without a resulting noticeable loss of transmission quality. (FIG. 4).
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Barschall Anne E.
Briody Thomas A.
Haken Jack E.
Safourek Benedict V.
U.S. Philips Corporation
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