Lee Fang Wei: Trellis coded modulation employing lower dimensionality convolutional encoder. Lucent Technologies, R D Slusky, January 6, 1998: US05706312 (93 worldwide citation)

Coding gain is improved by employing an N-dimensional trellis encoder incorporating an N'-dimensional convolutional encoder where N' is less than N. The additional coding gain is realized as a shaping gain. This unique modulator encodes a digital signal by generating a sequence of N-dimensional symb ...

Victor B Lawrence, Arun N Netravali, Jean Jacques Werner: Coding for digital transmission. AT&T Bell Laboratories, R D Slusky, November 17, 1992: US05164963 (76 worldwide citation)

Digital signals, such as digitized television signals, are subjected to a source coding step followed by a channel mapping step. The source coding step causes the television signal to be represented by two or more data streams while, in the channel mapping step, the mapping is such that the data ele ...

Willem B Kleijn: Decomposition in noise and periodic signal waveforms in waveform interpolation. AT&T, Thomas A Restaino, R D Slusky, May 14, 1996: US05517595 (62 worldwide citation)

A method of coding a speech signal is described. In accordance with the method, a plurality of sets of indexed parameters are generated based on samples of the speech signal. Each set of indexed parameters corresponds to a waveform characterizing the speech signal at a discrete point in time. Parame ...

Jean J Werner: Echo canceller. Bell Telephone Laboratories Incorporated, R D Slusky, August 7, 1984: US04464545 (53 worldwide citation)

An echo canceller for passband data signals is comprised of a pair of real passband filters which generate samples of the echo replica in response to respective streams of rotated data symbol components.

William L Betts, Stanley Bottoms: Inband coding of secondary data. AT&T Bell Laboratories, R D Slusky, April 14, 1992: US05105443 (29 worldwide citation)

A modem which represents the transmitted primary data stream using signal points selected via a trellis code is provided with the further capability of transmitting secondary data. In particular, a standard constellation of signal points is expanded to include a number of signal points which is grea ...

Sanja Durinovic Johri, Patricia E Wirth: Access control system with lockout. AT&T, T A Restaino, R D Slusky, February 27, 1996: US05495235 (26 worldwide citation)

An access control system stores two codes for each user that is authorized to access a resource, a primary code and a secondary code. When a user desiring access inputs the primary code to the system, the code is compared with the stored code for that user. If the primary code is valid, the user is ...

Vishwani D Agrawal, Tapan J Chakraborty: Method and apparatus for test generation and fault simulation for sequential circuits with embedded random access memories (RAMs). AT&T, R B Levy, R D Slusky, March 12, 1996: US05499249 (23 worldwide citation)

Testing of a sequential circuit (10) containing at least one embedded RAM (16) is accomplished by first generating a set of sequential vectors and then applying the vectors in sequence to a set of primary circuit inputs (PO.sub.o -PO.sub.j). The vectors are generated such that upon application to th ...

Lee Fang Wei: Technique for compensating for intersymbol interference. AT&T Bell Laboratories, R D Slusky, G A deBlasi, March 16, 1993: US05195107 (19 worldwide citation)

In a communications system, a generalized partial response signaling (GPRS) technique is employed to compensate for intersymbol interference. To this end, signal points representative of data to be transmitted are selected from a signal constellation. This signal constellation includes a multiplicit ...

Joze Bevk, Leonard C Feldman, Hans Joachim L Gossmann, Henry S Luftman, Ran Hong Yan: Method for making a semiconductor device including diffusion control. AT&T, M I Finston, R D Slusky, March 19, 1996: US05500391 (5 worldwide citation)

A process for making a MOS device on a silicon substrate includes the step of forming a buried layer of germanium-silicon alloy in the substrate, or, alternatively, a buried layer of silicon enclosed between thin, germanium-rich layers. This buried layer is doped with boron, and tends to confine the ...

Richard T Flanagan: Phase-lock loop with adaptive scaling element. AT&T Bell Laboratories, R D Slusky, November 10, 1992: US05162762 (5 worldwide citation)

A phase-lock loop includes a scaling element whose scale factor is adaptively adjusted as a function of the value of a state variable in the loop--illustratively, the magnitude thereof. That function is such that, after the adjustment has been made, the value taken on by the state variable is within ...