21
Hong Y Chung: Technique for achieving the theoretical coding gain of digital signals incorporating error correction. AT&T Bell Laboratories, David R Padnes, February 19, 1991: US04995057 (47 worldwide citation)

The theoretical coding gain associated with an error correction technique can be realized in a digital communications system employing this error correction by providing the equalization in the transmitter instead of the receiver. In a first embodiment, an automatic equalizer in the receiver of a di ...


22
Peter D Karabinis: Asynchronous and non-data decision directed equalizer adjustment. AT&T Bell Laboratories, David R Padnes, January 6, 1987: US04635276 (44 worldwide citation)

Equalizers, which provide distortion compensation for a modulated carrier signal having a time-varying signal envelope, are adjusted at selected times in response to the signal envelope and the data signals regenerated therefrom. Each selected time corresponds to a time when the signal envelope has ...


23
Peter K Runge: Optical fiber connector. AT&T Bell Laboratories, Sylvan Sherman, David R Padnes, April 23, 1985: US04512630 (43 worldwide citation)

In a disconnectable low-loss optical connection for optical fibers, each fiber in a pair of optical fibers is surrounded by a connector body to the conical frustum mating end of which is applied a tiny, transparent, flexible index matching dome of silicone rubber or equivalent material. The connecto ...


24
Hong Y Chung, Michael D Rauchwerk: Data communications with alternation of signaling constellations. AT&T Bell Laboratories, Ronald D Slusky, David R Padnes, June 4, 1991: US05022053 (42 worldwide citation)

Primary and secondary data are communicated from a transmitter to a receiver in a communication system. The value of an individual primary data word is communicated by transmitting an individual one of first plurality of channel symbols associated with that value while the value of a combined data w ...


25
Gary A Turner: High capacity elastic store having continuously variable delay. Bell Telephone Laboratories Incorporated, David R Padnes, April 27, 1982: US04327411 (41 worldwide citation)

A commutator-type data store (102) is serially connected to a variable length shift register (104). Data is first written in the commutator store at the incoming varying line rate. A predetermined time later, the stored bits are read out from the commutator-type store and stored in the shift registe ...


26
Norman R Lampert: Stripline support assembly. Bell Telephone Laboratories Incorporated, David R Padnes, December 21, 1982: US04365222 (41 worldwide citation)

In a stripline transmission assembly, precise positioning of the metallic conductor (10) within the grounded channel (11) is achieved through the use of one or more support posts (20). Each post is inserted into a hole (30) in the channel bottom and extends through a hole (31) in the metallic conduc ...


27
Gerald L Fenderson, Mitchell A Skinner: Method and apparatus for signal-eye tracking in digital transmission systems. Bell Telephone Laboratories Incorporated, David R Padnes, March 8, 1983: US04376309 (39 worldwide citation)

An improvement in tracking the signal-eyes (FIG. 4) formed by a digital signal is disclosed. This improvement is achieved by forming a sample at a regeneration sampling time (e.g., 404), a first sampling time (e.g., 401) and a second sampling time (e.g., 402). The first and second sampling times res ...


28
Carl E Gunnersen, Terry D Mathis: Resilient optical fiber connector. Bell Telephone Laboratories Incorporated, Sylvia J Chin, David R Padnes, March 23, 1982: US04320938 (39 worldwide citation)

A connector assembly (10) has been developed with an aligning coupler (300) and connectors (100, 200) which simplify the joining of a pair of mateable optical fiber termination structures (112, 212). The coupler (300) comprises a pair of rigid elongated members (310, 340) having inner surfaces (312, ...


29
David G Shaw: Predistortion technique for communications systems. AT&T Bell Laboratories, David R Padnes, October 5, 1993: US05251328 (39 worldwide citation)

The problem of noise enhancement is eliminated in communications systems by predistorting the amplitude of the transmitted information signal in a manner which compensates for the amplitude distortion introduced in a portion of the communications channel. In the disclosed embodiments, the communicat ...


30
Kevin J Oye, Enzo Paterno, Thomas L Smith: Variable data compression announcement circuit. American Telephone and Telegraph Company, AT&T Information Systems, David H Tannenbaum, David R Padnes, December 13, 1988: US04791660 (38 worldwide citation)

There is disclosed a call announcement circuit integrated into the switching network of a PBX switching system such that the announcement board resides in one of the port slots and has direct access to the internal system buses. The circuit can handle many separate announcements each stored at a sel ...