James Friedmann from Canton, OH

System For Increasing Rf Power As A Constant Over A Temperature Range And Employing Reduced Transmitter Current Drain During Low Power Output Periods
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US Patent:

6661999, Dec 9, 2003
Filed:

Dec 28, 2000
Appl. No.:

09/750818
Inventors:

Gerald B. Johnson - Hudson OH
James Friedmann - Canton OH
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04B 104
US Classification:

4551271, 4551272, 455522, 375146
Abstract:

A system and method for transmitting data communications through air using a radio. The invention allows the user to select from a number of predetermined output transmission powers. When a lower output transmission power is selected the current drain to the associated amplifier is decreased thereby conserving battery power of the radio. In addition, a detector diode circuit combined with an adjustable gain amplifier combine to provide a feedback mechanism whereby the output transmission power of the radio is held substantially constant over a broad range of temperatures.

Maintaining Constant Power Over A Wide Range Of Temperatures Employing A Power Amplifier With Adjustable Current Drain
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US Patent:

7184722, Feb 27, 2007
Filed:

Dec 1, 2003
Appl. No.:

10/724796
Inventors:

Gerald B. Johnson - Hudson OH, US
James Friedmann - Canton OH, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04B 1/04
US Classification:

4551271, 4551272, 455522, 455574, 4553431, 375146
Abstract:

A system and method for transmitting data communications through air using a radio. The invention allows the user to select from a number of predetermined output transmission powers. When a lower output transmission power is selected the current drain to the associated amplifier is decreased thereby conserving battery power of the radio. In addition, a detector diode circuit combined with an adjustable gain amplifier combine to provide a feedback mechanism whereby the output transmission power of the radio is held substantially constant over a broad range of temperatures.

High Density Wlan System
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US Patent:

7529218, May 5, 2009
Filed:

Oct 29, 2004
Appl. No.:

10/977284
Inventors:

Daniel Lyons - Chippewa OH, US
David Petsko - Akron OH, US
Donald I. Sloan - Stow OH, US
James Jay Friedmann - Canton OH, US
James A. Amos - North Canton OH, US
Fred J. Anderson - Lakeville OH, US
International Classification:

H04W 52/00
H04B 7/00
US Classification:

370338, 455421, 4551153, 4552262, 455513
Abstract:

A method for controlling cell size associated with an access point that has a receive sensitivity and an output power. The method includes changing a start of packet threshold and/or a clear channel assessment threshold to vary the cell size of the access point.

Universal Radio For Use In Various Cellular Communication Systems
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US Patent:

62230530, Apr 24, 2001
Filed:

Jun 26, 1996
Appl. No.:

8/670622
Inventors:

James J. Friedmann - Canton OH
Nainesh P. Shah - Parma OH
Assignee:

Cisco Systems, Inc. - San Jose CA
International Classification:

H04B 136
US Classification:

455552
Abstract:

A universal radio having adjustable communication parameters such that the radio can communicate in different DS or FH type systems as well as DS-FH hybrid type systems which employ both DS and FH spread spectrum techniques. The radio is included in a mobile terminal and/or base station and can be adjusted by the user to employ communication parameters relating to various different cellular communication systems. Thus, the mobile terminal and/or base station can be used in combination with the cellular communication systems provided by different manufacturers.

Sinusoidal Phase Modulation Method And System
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US Patent:

58223622, Oct 13, 1998
Filed:

Mar 15, 1996
Appl. No.:

8/616254
Inventors:

James J. Friedmann - Canton OH
Assignee:

Aironet Wireless Communications, Inc. - Fairlawn OH
International Classification:

H04B 1500
US Classification:

375200
Abstract:

A system which phase modulates a carrier to produce a carrier signal which transitions in phase between predetermined phase states as a function of the data, wherein a rate at which the carrier signal changes phase during a transition between the predetermined phase states varies substantially sinusoidally. The phase modulation provides a constant amplitude modulated waveform having low side lobes. Such modulation method preserves the high noise tolerance capabilities associated with FH systems and the high data throughput capabilities of DS systems.

Electromagnetic Shielding Assembly For Printed Circuit Board
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US Patent:

55507131, Aug 27, 1996
Filed:

Sep 6, 1995
Appl. No.:

8/524248
Inventors:

Stephen M. Pressler - Uniontown OH
James J. Friedmann - Canton OH
Donald I. Sloan - Stow OH
Assignee:

Aironet Wireless Communications, Inc. - Fairlawn OH
International Classification:

H05K 900
US Classification:

361818
Abstract:

A shielding assembly for a PC board having ground trace segments on a surface of the board is disclosed. The shielding assembly includes a cover, shielding assembly, a sealing gasket and a fastener. The cover includes an integrally molded base portion and a fencing portion extending outwardly from a surface of the base portion. The fencing includes peripheral edges configured to overlie the ground trace segments. The sealing gasket is disposed between the fencing and the ground trace segments. The fastener mechanically couples the cover to the PC board surface.

Orientation Based Transmission Power
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US Patent:

20220295420, Sep 15, 2022
Filed:

Mar 9, 2021
Appl. No.:

17/195968
Inventors:

- Sunnyvale CA, US
Gurpreet Singh - San Francisco CA, US
Joshua Rosenthal - San Jose CA, US
James Jay Friedmann - Canton OH, US
International Classification:

H04W 52/28
H04W 52/36
H04W 52/22
Abstract:

Disclosed are embodiments of a device that includes an orientation sensor. Based on the device's orientation, a transmit power of the device is limited to ensure that transmission of the device do not exceed regulatory requirements. The transmit power limit is based, in some embodiments, on a manufacturer or model of the device, which indicates a position of one or more antennas relative to the device, and allows for a determination of an amount of power transmitted above the horizon in a given orientation.

Dynamically Adjusting Number Of Transmit Antennas For Mimo Systems To Use Greater Transmit Power
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US Patent:

20140205039, Jul 24, 2014
Filed:

Feb 28, 2013
Appl. No.:

13/780598
Inventors:

- San Jose CA, US
James Friedmann - Canton OH, US
Greg Corsetto - Mountain View CA, US
Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA
International Classification:

H04B 7/04
US Classification:

375295
Abstract:

Techniques are presented to reduce the number of antennas used for a transmission for a given antenna configuration and data rate. At a wireless communication device having a plurality of antennas and capable of sending a transmission via one or more of the plurality of antennas, a determination is made of a data rate and antenna configuration to be used for a transmission. A comparison is made between a total transmit power for a minimum number of antennas for the data rate to be used for the transmission and a total transmit power associated with the antenna configuration for the transmission. When the total transmit power for a minimum number of antennas for the data rate is greater than the total transmit power associated with the antenna configuration for the transmission, the transmission is sent with the minimum number of antennas.