Antoine Jean Rouphael

US Patent:

6400317, Jun 4, 2002

Filed:

Feb 2, 2001

Appl. No.:

09/776397

Inventors:

Antoine J. Rouphael - Escondido CA
Daniel Innis Riley - West Melbourne FL
John Erich Hoffmann - Indialantic FL

Assignee:

Tantivy Communications, Inc. - Melbourne FL

International Classification:

H04B 700

US Classification:

342367

Abstract:

An antenna apparatus for increasing the capacity in a cellular communication system. The antenna operates in conjunction with a mobile subscriber unit and provides a plurality of antenna elements, each coupled to a respective signal control component to provide a weight to the signal transmitted from each element. The weight for each antenna element is adjusted to achieve optimum reception during, for example, an idle mode when a pilot signal is received. The weight values cause the antenna array to create a beam former for signals to be transmitted from the mobile subscriber unit, and a directional receiving array to more optimally detect and receive signals transmitted from the base station. By directionally receiving and transmitting signals, multipath fading and intercell interference are greatly reduced. The weights are adjusted at the transmitting site in accord with signal quality metric information determined at the receiving site.

US Patent:

6545994, Apr 8, 2003

Filed:

Feb 23, 2001

Appl. No.:

09/792410

Inventors:

John E. Hoffmann - Indialantic FL
Antoine J. Rouphael - Escondido CA

Assignee:

Tantivy Communications, Inc. - Melbourne FL

International Classification:

H04B 7212

US Classification:

370337, 370345, 370347, 370441, 455452, 455522, 714 36, 714750

Abstract:

In an illustrative embodiment of the present invention, a first channel is allocated for transmitting sporadically generated messages from multiple field units to a base station. The first channel is preferably divided into time slots in which a field unit transmits an access request message to the base station for establishing a communication link. In response to an access request message, feedback information is provided from the base station to multiple field units indicating whether a collision was detected on the first channel for a message transmitted in a previous time slot. In an instance when a collision is detected, the field unit will re-transmit an access request message at a previous power level setting based on a random back off time. If no collision is detected and the base station fails to transmit an acknowledgment message from the base station to the access requesting field unit, the power output level of the field unit is increased for successive message transmissions until the message is received.

US Patent:

6751775, Jun 15, 2004

Filed:

Nov 21, 2001

Appl. No.:

09/990633

Inventors:

Lichung Chu - San Diego CA
Thomas Klingenbrunn - San Diego CA
Benny Vejlgaard - San Diego CA
Antoine J. Rouphael - Escondido CA

Assignee:

Siemens Information and Communication Mobile, LLC - San Diego CA

International Classification:

H03M 1303

US Classification:

714795, 714792, 375233, 375262, 375265, 375341

Abstract:

A method of determining a trellis from a sequence of n symbols in a Viterbi detector. The method includes the steps of receiving a sequence of n symbols, defining partitioned sets according to a decision tree structure, and determining size of each set partitioning according to tap energy of the channel. The method also includes steps of determining a reduced set of connection paths between the current layer and a destination layer in the trellis by determining a value of a most likely oldest partitioned set in a current layer; and calculating branch metrics only for the current layers in the trellis in which the oldest partitioned set matches the determined value.

US Patent:

6845104, Jan 18, 2005

Filed:

Oct 7, 2002

Appl. No.:

10/266079

Inventors:

Kevin P. Johnson - Palm Bay FL, US
Antoine J. Rouphael - Escondido CA, US

Assignee:

IPR Licensing, Inc. - Wilmington DE

International Classification:

H04B 7212

US Classification:

370442, 370347, 370337, 370322, 370348, 370431, 370458

Abstract:

A technique for a time division multiplex system in which access to shared broadcast communication media is granted on a demand basis. Particular connections are assigned slot times at the transmitter based on demand. However, no specific information regarding the assignment of time slots need be communicated to the receivers. The transmit side employs a forward error correction technique followed by multiplication by a cover sequence unique to each connection. All receivers listen to the broadcast transmission channel all of the time. The receiver assigned to each connection decodes the signals in such a manner that only the receiver with the correct cover sequence assigned to a particular connection will successfully decode the data associated with that connection. Data frames that fail the forward error correction process are discarded, and only those frames which are successfully decoded are passed up to a higher layer. The occurrence of an erroneously received frame is not necessarily always reported to the transmit side of the connection; only a packet level error indication is made.

US Patent:

6894653, May 17, 2005

Filed:

Sep 17, 2003

Appl. No.:

10/664413

Inventors:

Bing Chiang - Melbourne FL, US
Kenneth M. Gainey - Satellite Beach FL, US
Antoine J. Rouphael - Escondido CA, US
Griffin K. Gothard - Satellite Beach FL, US
Michael J. Lynch - Merritt Island FL, US

Assignee:

IPR Licensing, Inc. - Wilmington DE

International Classification:

H01Q003/00

US Classification:

343757, 343853, 342372

Abstract:

An antenna assembly includes at least two active or main radiating omni-directional antenna elements arranged with at least one beam control or passive antenna element used as a reflector. The beam control antenna element(s) may have multiple reactance elements that can electrically terminate it to adjust the input or output beam pattern(s) produced by the combination of the active antenna elements and the beam control antenna element(s). More specifically, the beam control antenna element(s) may be coupled to different terminating reactances to change beam characteristics, such as the directivity and angular beamwidth. Processing may be employed to select which terminating reactance to use. Consequently, the radiator pattern of the antenna can be more easily directed towards a specific target receiver/transmitter, reduce signal-to-noise interference levels, and/or increase gain by using Radio Frequency (RF), Intermediate Frequency (IF), or baseband processing. A Multiple-Input, Multiple-Output (MIMO) processing technique may be employed to operate the antenna assembly with simultaneous beam patterns.

US Patent:

6904079, Jun 7, 2005

Filed:

Jan 19, 2001

Appl. No.:

09/766875

Inventors:

John E. Hoffmann - Indialantic FL, US
Antoine J. Rouphael - Escondido CA, US

Assignee:

IPR Licensing, Inc. - Wilmington DE

International Classification:

H04L027/30

US Classification:

375145, 375149, 375364, 370491, 370500, 370510, 370514

Abstract:

A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter. The additional pilot symbols embedded in the payload portion are used in a cross product operation to further resolve the effects of multipath fading.

US Patent:

7002902, Feb 21, 2006

Filed:

Feb 23, 2001

Appl. No.:

09/791503

Inventors:

Antoine J. Rouphael - Escondido CA, US
John E. Hoffmann - Indialantic FL, US

Assignee:

IPR Licensing, Inc. - Wilmington DE

International Classification:

H04J 11/00

US Classification:

370209, 370335, 370342, 370479, 375130, 375147

Abstract:

Codes are applied to signals to reduce the number of transceivers and associated RF cabling extending from base electronics to antenna array electronics in a base station providing beam forming. The transceivers can be reduced to as few as one, and the RF cabling can be reduced to none. The codes may be orthogonal codes, such as Walsh codes. The codes are applied: to weights used to produce the beam forming, signal being transmitted or received, or both. The codes are applied a second time to decompose the coded weights/signal to associate the weights and signal with the beam forming. The coded weights/signal can be summed, including with other coded weights/signals, to produce a composite code division multiplexed signal for transmission between transceiver(s) and antenna array electronics over a single RF or non-RF cable spanning between the base electronics and array electronics. The complexity, size, and cost of electronics and cables are reduced, and calibration of transceivers and demodulators can be eliminated.

US Patent:

7006483, Feb 28, 2006

Filed:

Feb 23, 2001

Appl. No.:

09/792637

Inventors:

John E. Hoffmann - Indialantic FL, US
Antoine J. Rouphael - Escondido CA, US

Assignee:

IPR Licensing, Inc. - Wilmington DE

International Classification:

H04B 7/212

US Classification:

370342, 370468

Abstract:

Data rate allocation decisions are made for a communications channel, such as a wireless reverse link connection. A first parameter used in this determination is a path loss, which is determined by the following process. First, a message is sent from a first station to a second station, such as on a paging channel. The message indicates a forward Effective Radiated Power (ERP) of a pilot signal transmitted by the first station. The second station then determines the received signal strength of this pilot signal, taking into account receiver gains. The path loss can then be estimated by the second station as the difference between the forward ERP data value that it received and the detected received pilot power. The second station also then preferably determines a transmit power level when transmitting a message back to the first station. This transmit power level information is encoded as a digital data word together with the forward path loss information as calculated by the first station.