Denise Maureen Cammarata, 6010 Quail Covey Ct, Reisterstown, MD 21136

6345377, Feb 5, 2002

Apr 20, 2000

09/553195

Brian William Kroeger - Sykesville MD
Roy Ronald Stehlik - Columbia MD
Denise Maureen Cammarata - Owings Mills MD

Ibiquity Digital Corporation - Columbia MD

H03M 1303

714790, 375308, 370206

A broadcasting method comprising the steps of encoding program material using codes including a first set of bits and a second set of bits, the first set of bits contributing a greater coding gain to the codes than the second set of bits, modulating a plurality of orthogonal frequency division multiplexed carrier signals with the codes, whereby the first set of bits are carried by a first group of the carrier signals and the second set of bits are carried by a second group of the carrier signals, the first group of carrier signals being less susceptible to interference than the second group of carrier signals, broadcasting the carrier signals, receiving the carrier signals, estimating the interference to which the carrier signals in the second group have been subjected to determine if carrier signals in the second group have been corrupted, erasing bits carried by any of the carrier signals which have been determined to be corrupted, and decoding bits of the codes that have not been erased.

6430227, Aug 6, 2002

Mar 27, 1998

09/049210

Brian William Kroeger - Sykesville MD
Denise Maureen Cammarata - Owings Mills MD
Richard Edward Martinson - Sykesville MD
Jeffrey Scott Baird - Columbia MD
Paul James Peyla - Elkridge MD
E. Glynn Walden - Marlton NJ

Ibiquity Digital Corporation - Columbia MD

H04L 2728

375260, 375295, 375316

This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data.

6895060, May 17, 2005

Oct 15, 2001

09/977710

Brian William Kroeger - Sykesville MD, US
Denise Maureen Cammarata - Owings Mills MD, US

iBiquity Digital Corporation - Columbia MD

H04L027/22

375340, 375332, 375341, 714795

A method for weighting orthogonal frequency division multiplexed soft symbols is provided, including the steps of receiving a plurality of sub-carriers modulated by digital information and filtering the sub-carriers to produce complex soft decision outputs. The magnitudes of the soft decision outputs are used to creating a first sequence of data. The differences between successive samples in the first sequence are used to create a second sequence of data. The first and second sequences are used to determine a plurality of weights and the weights are applied to the complex soft decision outputs. A receiver which incorporates the method is also disclosed.

6317470, Nov 13, 2001

Sep 15, 1998

9/153636

Brian William Kroeger - Sykesville MD
Denise Maureen Cammarata - Owings Mills MD

iBiquity Digital Corporation - Columbia MD

H04L 2722

375340

A method for weighting orthogonal frequency division multiplexed soft symbols is provided, including the steps of receiving a plurality of sub-carriers modulated by digital information and filtering the sub-carriers to produce complex soft decision outputs. The magnitudes of the soft decision outputs are used to creating a first sequence of data. The differences between successive samples in the first sequence are used to create a second sequence of data. The first and second sequences are filtered and compensated for differences in effective group delay of the first and second sequences to produce third and fourth sequences. Then these third and fourth sequences are used to determine a plurality of weights and the weights are applied to the complex soft decision outputs. A receiver which incorporates the method is also disclosed.

6108810, Aug 22, 2000

Mar 27, 1998

9/049140

Brian William Kroeger - Sykesville MD
Roy Ronald Stehlik - Columbia MD
Denise Maureen Cammarata - Owings Mills MD

USA Digital Radio, Inc. - Columbia MD

G06F 1110

714790

A broadcasting method encodes program material using convolutional codes having non-puncturable bits and puncturable bits and modulates orthogonal frequency division multiplexed carrier signals with the convolutional codes. The non-puncturable bits are carried by a first group of the carriers and the puncturable bits are carried by a second group of the carriers, where the first group of carrier signals is less susceptible to interference than the second group of carrier signals. The carrier signals are then broadcast to receivers which determine if the carriers in the second group have been corrupted and erase puncturable bits carried by any of the carriers which have been determined to be corrupted. This produces punctured codes which are subsequently decoded to recover the program material.

5930295, Jul 27, 1999

Feb 23, 1996

8/605978

William C. Isley - Bowie MD
Denise M. Cammarata - Owings Mills MD
Raymond R. Cooper - Baltimore MD
Jeffrey D. York - Arnold MD
Perry E. King - Eldersburg MD

H04B 138

375219

A mobile terminal for satellite communication of voice data, facsimile and computer information, which consists of an RF transceiver section, and a processor board. The processor board has two digital signal processors and a multi-task control processor for controlling the operation of the two signal processors. Net radio service is implemented in the mobile terminal and includes a priority 1 mode wherein a channel search is performed on a net radio channel database for an available channel if any problem is initially encountered in obtaining control of a specific communication channel such as a channel currently in use or a channel designated for use as a default channel.

5742639, Apr 21, 1998

Oct 13, 1994

8/322858

Albert J. Fasulo - Ellicott City MD
Denise M. Cammarata - Owings Mills MD
Keith W. Janson - Ellicott City MD
Samuel S. Anderson - Glen Burnie MD
Raymond R. Cooper - Baltimore MD
Roy Stehlik - Columbia MD

Westinghouse Electric Corporation - Pittsburgh PA

H04B 138

375219

A mobile terminal apparatus for satellite communication of voice data, facsimile and computer information, which consists of an RF transceiver section, an optional cellular board, and a processor board. The processor board has two digital signal processors and a multi-task control processor for controlling the operation of the signal processor.

5828957, Oct 27, 1998

Mar 14, 1996

8/615937

Brian W. Kroeger - Sykesville MD
Gregory W. Seker - Columbia MD
Paul J. Peyla - Elkridge MD
George N. Eberl - Columbia MD
Denise M. Cammarata - Owings Mills MD

H04Q 700

455428

An improved satellite beam acquisition and crossover technique for finding an appropriate satellite beam by searching for and acquiring a strongest pilot channel, searching for signalling channels on the acquired strongest pilot channel and monitoring the acquired signalling channel. Beam acquisition of a continuous wave pilot as in the preferred embodiment is faster and more reliable than beam acquisition of a modulated channel. Moreover, the acquired pilot channel can be used to unambiguously precalibrate the frequency reference of the mobile terminal. Also, acquisition of the pilot ensures that the corresponding satellite beam is not blocked or shadowed immediately prior to searching for a signalling channel, which significantly improves the reliability while reducing the time required for the search process. Mitigation of fading and shadowing is provided by using fast attack, slow decay non-linear filtering.