Pulse or digital communications – Repeaters – Testing
Patent
1982-07-01
1984-11-13
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
358905, 333 18, H04B 318
Patent
active
044830106
ABSTRACT:
An automatic equalizer includes two wave memories. These wave memories jointly constitute a wave integration memory for storing amplitude information of an input signal. The wave form of input signal to be equalized is divided into fragments along time base, and the amplitude components (analog) of respective fragments are sequentially converted to digital forms in a manner that these fragmentary digital components are alternatively distributed to respective wave memories. For instance, the digital components of odd number fragments are stored in one wave memory, and the digital components of even number fragments are stored in the other wave memory. In this case, the read/write speed of each wave memory may be half of the read/write speed of a prior art wave integration memory which should store all fragments of the digital components.
The fragmentary digital components corresponding to the input signal wave form are divided into at least two groups, e.g. an odd group and an even group. A correlator of the automatic equalizer possesses a function for differentiating the fragmentary digital components. The differentiation operation is carried out with the correlation operation by subtracting one fragmentary component of even group from that of odd group.
REFERENCES:
patent: 4224679 (1980-09-01), Nossen et al.
patent: 4389623 (1983-06-01), Onishi et al.
patent: 4404600 (1983-09-01), Murakami
patent: 4414641 (1983-11-01), Jarrett
EMCJ 80-67, (Oct. 1980), "Ghost Canceller Utilizing An Integrated CCD".
IEEE Transactions CE-26,3, p. 629, Aug. 1980, "A Novel Automatic Ghost Canceller".
Safourek Benedict V.
Tokyo Shibaura Denki Kabushiki Kaisha
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