Richard F Roberts
Radiology in Melbourne, FL

6577670, Jun 10, 2003

Aug 20, 1999

09/378532

Richard D. Roberts - Palm Bay FL

Intersil Americas Inc. - Milpitas CA

H04B 1713

375133, 375140

A controlled interference-avoidance, band-rejection filtering mechanism is installable in a direct sequence spread spectrum communication device (e. g. , a DSSS radio). This controlled filtering mechanism monitors a potentially interfering frequency-hopping spread spectrum (FHSS) transmitter, to identify one or more frequencies to which the FHSS transmitter is expected to hop during a communication interval of the DSSS communication device. Based upon this frequency-hopping information, one or more spectral notches are programmed into the passband spectrum of a DSSS band-rejection filter, so as to exclude the potentially interfering frequencies from DSSS communication signals employed by the DSSS communication device during its communication interval.

6678503, Jan 13, 2004

May 17, 2000

09/573782

Eric C. Black - Mountain View CA
Richard D. Roberts - Palm Bay FL

Intersil Americas Inc. - Milpitas CA

H04B 140

455 76, 455 86

An apparatus for radio frequency processing includes a local oscillator synthesizer circuit having a voltage controlled oscillator that generates an oscillator signal f. A divide-by-N circuit receives the oscillator circuit f and divides that signal to produce an f /N oscillator signal. A dual modulus synthesizer is connected to the divide-by-N circuit and generates a quadrature modulus signal f /N. A receiver circuit and a transmitter circuit are operatively connected to the local oscillator synthesizer circuit. Each of the receiver circuits and transmitter circuits has at least two mixer circuits for mixing and respectively down converting/up converting intermediate radio frequency signals. The local oscillator synthesizer provides local oscillation for each of the mixer circuits.

5425052, Jun 13, 1995

Aug 14, 1992

7/930728

Mark A. Webster - Palm Bay FL
Richard D. Roberts - Palm Bay FL
Keith R. Baldwin - Melbourne Beach FL

Harris Corporation - Melbourne FL

H04B 346

375224

A wireline bridge tap device and an associated signal processing mechanism are capable of successfully extracting and recovering the respective signalling components of a full-duplex wireline digital data link without having to disturb the link during its use (e. g. as by interrupting service to sever the link in order to install a line coupling device, such as a modem or attenuator pad to signal monitoring equipment). The full-duplex wireline bridge device comprises a signal characteristic monitoring device that is capable of monitoring the link and providing respective output signals representative of the respective unidirectional signal components being transmitted simultaneously in opposite directions along the link. A directional signal separator, comprised of a voltage probe and a current probe, each of which can be coupled to the link without severing the link or otherwise disrupting ongoing communications, couples the signal characteristic monitoring device to the link. The signal processing device is operative to controllably combine the outputs of the voltage and current probes and provides respective output signals that are representative of the desired unidirectional signal components.

6263048, Jul 17, 2001

Jan 26, 2000

9/491438

George Rodney Nelson - Merritt Island FL
Richard D. Roberts - Palm Bay FL
Ronald S. Squires - Agoura Hills CA

Harris Corporation - Melbourne FL

H04M 124

379 27

The performance of digital subscriber loops is tested through transmission, reception and analysis of a multi-tone power ratio (MTPR) waveform, containing plural discrete tones having equal spectral spacings and notches periodically distributed among the tones. The noise floor at a missing sub-carrier spectral location is integrated and compared to signal power of an adjacent sub-carrier within the test vector waveform. From these two values, MTPR is determined for various carrier locations, so that maximum theoretical loop payload can be calculated. To generated a figure of merit (FOM) under test, a data modem is placed at each end of the loop. The FOM obtained from MTPR analysis is channel based, not equipment based, and is independent of receiver implementation. Before placing a new customer in service, the MTPR FOMs for a number of loops are compared to bit rate information in a database, which correlates MTPR with a bit rate for a specific modem. Given the terminal equipment, MTPR FOMs, and the customer's data rate, one or more cable pairs that satisfy or exceed the FOM within an available cable bundle may be selected.

7359459, Apr 15, 2008

Jun 23, 2004

10/873422

William M. Shvodian - McLean VA, US
Richard D. Roberts - West Melbourne FL, US

Freescale Semiconductor, Inc. - Austin TX

H04L 27/00

375316, 375338, 375329, 375235, 375147, 375150, 375142, 375343, 4553435, 455574, 455 6711

A method is provided for performing a clear channel assessment in a local device. The local device receives signal energy in a wireless channel and splits the received signal energy into a real portion and an imaginary portion. It determines a real portion of a squared signal energy by subtracting a squared imaginary portion of the signal energy from a squared real portion of the signal energy, and determines an imaginary portion of the squared signal energy by calculating twice the product of the real and imaginary portions of the signal energy. It can perform a signal detection function on the real and imaginary portions of the squared signal energy to produce a clear channel assessment signal that indicates whether a set signal type is present in the wireless channel. This clear channel assessment signal can be used to determine whether the local device should remain in a low-power mode.

8194530, Jun 5, 2012

Sep 4, 2007

11/849579

Mark A. Webster - Indian Harbor Beach FL, US
Steven D. Halford - Palm Bay FL, US
Richard D. Roberts - Palm Bay FL, US

Intellectual Ventures I LLC - Wilmington DE

H04J 9/00

370204, 370338, 370341

A dual packet configuration for wireless communications including a first portion that is modulated according to a serial modulation and a second portion that is modulated according to a parallel modulation. The serial modulation may be DSSS whereas the parallel modulation may be OFDM. The first portion may include a header, which may further include an OFDM mode bit and a length field indicating the duration the second portion. The first portion may be in accordance with 802. 11b to enable dual mode devices to coexist and communicate in the same area as standard 802. 11b devices. The dual mode devices can communicate at different or higher data rates without interruption from the 802. 11b devices. The packet configuration may include an OFDM signal symbol which further includes a data rate section and a data count section. In this manner, data rates the same as or similar to the 802.

7263333, Aug 28, 2007

Oct 12, 2004

10/963392

Richard D. Roberts - Melbourne FL, US

Harris Corporation - Melbourne FL

H04B 17/00

455 6713, 455522, 455423

A wireless ultra wideband (UWB) network may include a plurality of UWB wireless devices communicating over a plurality of UWB frequency bins extending over a UWB frequency range. At least one of the UWB wireless devices may be for determining an existing interference level associated with at least one of the UWB frequency bins, and for setting a desired transmission level for use with the at least one UWB frequency bin. In particular, the desired transmission level may be set based upon the existing interference level to keep a predicted overall interference level of the at least one UWB frequency bin below an interference ceiling.

5500879, Mar 19, 1996

Mar 16, 1994

8/213886

Mark A. Webster - Palm Bay FL
Keith R. Baldwin - Melbourne Beach FL
Richard D. Roberts - Palm Bay FL

Adtran - Huntsville AL

H03K 702

375353

An apparatus for blind signal separation and equalization of PAM signals on a full duplex transmission line is capable of successfully extracting and recovering the respective signalling components of a full-duplex wireline digital data link without having to disturb the link during its use (e. g. as by interrupting service to sever the link in order to install a line coupling device, such as a modem or attenuator pad to signal monitoring equipment) and without having to generate PN or other training sequences. A full-duplex wireline bridge device comprises a signal characteristic monitoring device that is capable of monitoring the link and providing respective output signals representative of the respective unidirectional signal components being transmitted simultaneously in opposite directions along the link. A directional signal separator, comprised of a voltage probe and a current probe, each of which can be coupled to the link without severing the link or otherwise disrupting ongoing communications, couples the signal characteristic monitoring device to the link. The signal processing device is operative to controllably combine the outputs of the voltage and current probes and provides respective output signals that are representative of the desired unidirectional signal components.

4575683, Mar 11, 1986

Apr 10, 1985

6/721824

Richard D. Roberts - Palm Bay FL
Robert S. Padgett - Melbourne FL

Harris Corporation - Melbourne FL

H03D 300, H03D 318

329 50

An offset compensator is disclosed. The offset compensator is suitable for use with any antipodal information signal distorted by an offset voltage. The offset compensator measures the positive and negative peak amplitudes, compares the magnitudes thereof, and produces a correction voltage based on that comparison. The correction voltage has a positive sign when the magnitude of the negative peak amplitude exceeds the magnitude of the positive peak amplitude, and the correction voltage has a negative sign when the magnitude of the positive peak amplitude exceeds the magnitude of the negative peak amplitude. The magnitude of the correction voltage represents the difference between the magnitudes of the positive and negative peak amplitudes, and is added to the antipodal information signal to remove the offset voltage.

5042052, Aug 20, 1991

Feb 16, 1990

7/481089

Richard D. Roberts - Palm Bay FL
James C. Richards - Palm Bay FL
James F. Roesch - Palm Bay FL
Scott W. Stewart - Palm Bay FL
Mark A. Webster - Palm Bay FL

Harris Corporation - Melbourne FL

H03D 302

375 97

The invention involves an apparatus for recovering the carrier signal in OPSK or QAM data. First an energy directed phase detector controls a voltage controlled oscillator so that the output signal has a phase that is within a few degrees of the carrier phase. Following this coarse acquisition, the system clock timing is recovered and established. A decision directed phase detector, using the system clock information, then controls the VCO to adjust the output signal phase to within a very small tolerance of the actual carrier phase.