Jack S Salz

7200631, Apr 3, 2007

Jan 10, 2003

10/340575

Laurence Eugene Mailaender - New York NY, US
Jack Salz - Fair Haven NJ, US
Sivarama Krishnan Venkatesan - Secaucus NJ, US

Lucent Technologies Inc. - Murray Hill NJ

G06F 7/32
G06F 7/38

708520, 708605

Generally, a method and apparatus are provided for computing a matrix inverse square root of a given positive-definite Hermitian matrix, K. The disclosed technique for computing an inverse square root of a matrix may be implemented, for example, by the noise whitener of a MIMO receiver. Conventional noise whitening algorithms whiten a non-white vector, X, by applying a matrix, Q, to X, such that the resulting vector, Y, equal to QX, is a white vector. Thus, the noise whitening algorithms attempt to identify a matrix, Q, that when multiplied by the non-white vector, will convert the vector to a white vector. The disclosed iterative algorithm determines the matrix, Q, given the covariance matrix, K. The disclosed matrix inverse square root determination process initially establishes an initial matrix, Q, by multiplying an identity matrix by a scalar value and then continues to iterate and compute another value of the matrix, Q, until a convergence threshold is satisfied. The disclosed iterative algorithm only requires multiplication and addition operations and allows incremental updates when the covariance matrix, K, changes.

7653120, Jan 26, 2010

Feb 4, 2006

11/347589

Aiyou Chen - New Providence NJ, US
Thomas Louis Marzetta - Summit NJ, US
Jack Salz - Fair Haven NJ, US

Alcatel-Lucent USA Inc. - Murray Hill NJ

H04B 1/00

375141, 375146, 375147, 375219, 375221, 375295, 375296, 375316, 375346, 375348

A method for transmitting a sequence of data blocks of equal length includes obtaining part of a matrix for the impulse response function of a communication channel between a transmitter and a receiver. The part relating to channel-induced interference between sampling intervals of adjacent ones of the data blocks. The method includes designing a set of one or more linearly independent waveforms based on the obtained part of the matrix for the impulse response function and transmitting a sequence of the data blocks over the channel from the transmitter to the receiver. Each data block of the sequence is a weighted linear superposition of the one or more waveforms of the designed set.

57486816, May 5, 1998

Oct 27, 1995

8/549363

Vittorio Comino - Keansburg NJ
Gerard Joseph Foschini - South Amboy NJ
Isam M. Habbab - Old Bridge NJ
Sanjay Kasturia - Middletown NJ
Jack Salz - Fair Haven NJ
Michael Edward Prise - Kirkland WA
Ravi Subramanian - Palo Alto CA

Lucent Technologies Inc - Murrvay Hill NJ

H04L 2506

375319

DC offset cancellation and timing recovery is provided in a homodyne receiver. The homodyne receiver demodulates an RF signal to produce a baseband signal. An initial offset correction module determines an initial DC offset of the baseband signal. An initial offset correction is applied to the baseband signal to provide an initial corrected baseband signal. Wherein, a dynamic DC offset correction module determines a dynamic DC offset. A dynamic DC offset correction is applied to the initial corrected baseband signal providing a dynamic corrected baseband signal. A timing signal is acquired from the baseband signal for synchronizing the receiver to a transmitter. A method for correcting DC offset of a baseband signal in a homodyne receiver is also described.

45944792, Jun 10, 1986

Aug 18, 1983

6/524421

Cecil W. Farrow - Highlands NJ
Jack Salz - Fair Haven NJ

AT&T Information Systems Inc. Bell Telephone Laboratories, Inc. - Murray Hill NJ

H04B 320

1791702

A method and apparatus for rapid initialization of the transversal filter efficients in an echo canceler or echo measurement device is described. During initialization, a first data sequence is applied to a transmission channel, and an error signal representing the difference between the resulting echo and a replica thereof generated by the transversal filter is formed. The coefficients used to form the replica (in the case of an echo canceler) or to model the transmission channel (in the case of an echo measurement device) are then updated as a function of the error and a second data sequence which is orthogonal to the first sequence.

46445625, Feb 17, 1987

Aug 28, 1985

6/770174

Mohsen Kavehrad - Holmdel NJ
Jack Salz - Fair Haven NJ

AT&T Company - Holmdel NJ
AT&T Bell Laboratories - Holmdel NJ

H04B 112

375 14

Data-aided equalization and cancellation in digital data transmission over dually polarized fading radio channels is disclosed. The present invention uses decision feedback structures with finite-tap transversal filters. Subject to the assumption that some past and/or future data symbols are correctly detected, formulas and algorithms for evaluating the least mean-square error for different structures are disclosed. In a sequence of curves, the performance of various structures for a particular propagation model and several fading events are evaluated and compared.

41707648, Oct 9, 1979

Mar 6, 1978

5/883656

Jack Salz - Fair Haven NJ
Jean J. Werner - Eatontown NJ

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

H03C 500
H04L 2712

332 17

Combined amplitude and frequency-shift-keying (AM-FSK) modulation of a carrier wave by a baseband data signal achieves significant suppression of one of the sidebands to ease the design requirements of filters generally used in the transmission of FSK signals. The significant suppression effect is observed when the ratio of minimum to maximum amplitude of the envelope of the amplitude modulated carrier wave is restrained to be approximately between 0. 6 and 0. 9. In one embodiment amplitude modulation is performed by a pair of amplifiers, each having a predetermined gain. In another embodiment, an all digital technique is used to synthesize the AM-FSK signal.