Patents by Inventor Steven H. Gardner
Steven H. Gardner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7876849Abstract: A data transmission method and apparatus are disclosed using receivers having spatial diversity, with the receivers communicating with a common client via network communication. Improved systems and methods for data transmission according to the disclosed method and apparatus include at least: a transmission source for transmitting a data signal; a first receiver for receiving the data signal; a second receiver for receiving the data signal, wherein the second receiver is spaced apart from the first receiver thereby providing spatial diversity; and a communication network for facilitating communication between a client and at least the first receiver and the second receiver, as needed, wherein the client is capable of analyzing individual data signals received by the first and second receivers and forming a composite signal of a higher quality than the quality of the individual data signals.Type: GrantFiled: May 25, 2006Date of Patent: January 25, 2011Assignee: Viasat, Inc.Inventor: Steven H. Gardner
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Patent number: 7852868Abstract: A method for establishing a circuit connection over a network. Determining a channel quality profile of a medium connecting a source node and a destination node. Determining a throughput required to support a data rate requirement of an application that sources data. Determining a modulation type and modulation density at one or more frequency according to the channel quality profile. Selecting one or more of a set of frequencies, modulation types and modulation densities to support the throughput. Communicating the selection to nodes attached to the medium.Type: GrantFiled: November 5, 2008Date of Patent: December 14, 2010Assignee: Conexant Systems, Inc.Inventors: Steven H. Gardner, James E. Petranovich
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Patent number: 7830907Abstract: Provided is a frame structure for filtered OFDM signaling, wherein once every frame a central controller passes redundant broadcast data for a short time (e.g. 16 symbol times) over all frequencies in use. This broadcast, called a beacon, may carry control information, frame structure information, and other data. The rest of the frame is divided into other assignments, including broadband redundantly coded channels for broadcast, ALOHA contention access, or point-to-point transmissions, and including traffic channels that may use only some of the assigned frequencies intended primarily for point-to-point access. This allows a mix of TDMA and FDMA point-to-point and broadband access. This system may be controlled by a central coordinator, which issues reservations. This system allows devices on a frequency-selective channel to communicate with scheduled operations.Type: GrantFiled: September 24, 2004Date of Patent: November 9, 2010Assignee: Coppergate Communications Ltd.Inventors: James E. Petranovich, Steven H. Gardner, Neal Riedel, Deepak Ayyagari, Daniel Park, Garold B Gaskill
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Patent number: 7724637Abstract: Disclosed are a method and apparatus for generating a controlled spectrum of modulated energy. A single data stream is splintered into substreams. Each substream is used to modulate a portion of the modulated spectrum. Each substream is transformed into a numerical phase and amplitude representation of a portion of the spectrum to be modulated. The combined numerical representations are then converted to a time-domain representation and filtered to eliminate undesired side-lobes.Type: GrantFiled: April 21, 2003Date of Patent: May 25, 2010Assignee: Conexant Systems, Inc.Inventor: Steven H. Gardner
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Publication number: 20090273671Abstract: An aerial surveillance apparatus for processing an analog video signal is described. The aerial surveillance apparatus includes a first input configured to receive an analog video signal from a video camera, a processor coupled with the analog video signal and configured to filter and digitize the analog video signal to form a de-emphasized digital signal, an output configured to couple to an FM video transmitter and to communicate the de-emphasized digital signal to the FM video transmitter. The filtering of the processor decreases amplitudes of higher frequencies within a band of frequencies more than amplitudes of lower frequencies within the band of frequencies, and the FM video transmitter filters the de-emphasized digital signal using a pre-emphasis filter that counteracts the filtering of the de-emphasis filter.Type: ApplicationFiled: February 17, 2009Publication date: November 5, 2009Applicant: ViaSat, Inc.Inventor: Steven H. Gardner
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Publication number: 20090052464Abstract: A method for establishing a circuit connection over a network. Determining a channel quality profile of a medium connecting a source node and a destination node. Determining a throughput required to support a data rate requirement of an application that sources data. Determining a modulation type and modulation density at one or more frequency according to the channel quality profile. Selecting one or more of a set of frequencies, modulation types and modulation densities to support the throughput. Communicating the selection to nodes attached to the medium.Type: ApplicationFiled: November 5, 2008Publication date: February 26, 2009Inventors: Steven H. Gardner, James E. Petranovich
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Patent number: 7450604Abstract: Local area network bandwidth is partitioned into periodic data frames. Data frames are further segregated into spectrum and time slots. Bandwidth reserved by assigning spectrum and time slots to particular circuit connections; enabling deterministic data transfer from source to destination nodes. Bandwidth reservations are broadcast to nodes attached to network.Type: GrantFiled: April 21, 2003Date of Patent: November 11, 2008Assignee: Conexant Systems, Inc.Inventors: Steven H. Gardner, James E. Petranovich
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Patent number: 7376075Abstract: The modulation method and system of the presented herein involves mapping data onto a constellations comprising a set of concentric circles in a two-dimensional plane, one dimension for the amplitude and one for the phase. The phase dimension is coded differentially, while the amplitude dimension is coded coherently. The circles in each constellation may contain equal number of points, and in other embodiments more points may be used on the outer circles. The data may be coded with dual Trellis codes, one code for the phase data and another code for the amplitude data.Type: GrantFiled: September 24, 2004Date of Patent: May 20, 2008Assignee: Conexant Systems, Inc.Inventors: James E. Petranovich, Yiorgos M. Peponides, Steven H. Gardner, Cenk Kose
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Publication number: 20070274410Abstract: A data transmission method and apparatus are disclosed using receivers having spatial diversity, with the receivers communicating with a common client via network communication. Improved systems and methods for data transmission according to the disclosed method and apparatus include at least: a transmission source for transmitting a data signal; a first receiver for receiving the data signal; a second receiver for receiving the data signal, wherein the second receiver is spaced apart from the first receiver thereby providing spatial diversity; and a communication network for facilitating communication between a client and at least the first receiver and the second receiver, as needed, wherein the client is capable of analyzing individual data signals received by the first and second receivers and forming a composite signal of a higher quality than the quality of the individual data signals.Type: ApplicationFiled: May 25, 2006Publication date: November 29, 2007Inventor: Steven H. Gardner
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Patent number: 7257165Abstract: A novel method and apparatus for preamble detection and time synchronization estimation in OFDM communication systems is described. The present invention can be easily implemented to provide preamble detection and highly accurate time synchronization estimations. The inventive method and apparatus utilizes phase and magnitude information obtained from a received signal to detect a preamble and to calculate a time synchronization estimation for the received signal.Type: GrantFiled: April 17, 2003Date of Patent: August 14, 2007Inventor: Steven H. Gardner
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Publication number: 20040125740Abstract: Disclosed are a method and apparatus for generating a controlled spectrum of modulated energy. A single data stream is splintered into substreams. Each substream is used to modulate a portion of the modulated spectrum. Each substream is transformed into a numerical phase and amplitude representation of a portion of the spectrum to be modulated. The combined numerical representations are then converted to a time-domain representation and filtered to eliminate undesired side-lobes.Type: ApplicationFiled: April 21, 2003Publication date: July 1, 2004Inventor: Steven H. Gardner
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Publication number: 20040081127Abstract: Local area network bandwidth is partitioned into periodic data frames. Data frames are further segregated into spectrum and time slots. Bandwidth reserved by assigning spectrum and time slots to particular circuit connections; enabling deterministic data transfer from source to destination nodes. Bandwidth reservations are broadcast to nodes attached to network.Type: ApplicationFiled: April 21, 2003Publication date: April 29, 2004Inventors: Steven H. Gardner, James E. Petranovich
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Publication number: 20040001430Abstract: A novel method and apparatus for preamble detection and time synchronization estimation in OFDM communication systems is described. The present invention can be easily implemented to provide preamble detection and highly accurate time synchronization estimations. The inventive method and apparatus utilizes phase and magnitude information obtained from a received signal to detect a preamble and to calculate a time synchronization estimation for the received signal.Type: ApplicationFiled: April 17, 2003Publication date: January 1, 2004Inventor: Steven H. Gardner
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Patent number: 6370135Abstract: A multi-mode communication system, including controller, base stations and subscriber stations, where the communication system has the capability of operating either in a packet-switched mode or a circuit-switched mode. The packet-switched mode of operation complies with the existing Cellular Digital Packet Data (CDPD) standard with respect to modulation and higher level protocol, and is designated continuous CDPD mode. This mode of operation is highly cost effective for transfers of relatively small amounts of data. For larger data transfers, the more cost-effective continuous CDPD mode is used. Thus, using this mode, the system is capable of providing superior data rate performance over a vastly greater coverage area than existing circuit-switched modems. Requests for access to continuous CDPD channels are initiated at subscriber stations.Type: GrantFiled: June 7, 1995Date of Patent: April 9, 2002Assignee: Cirrus Logic, Inc.Inventor: Steven H. Gardner
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Patent number: 6188903Abstract: A time sharing method and apparatus for frequency reuse in cellular communication systems. Frequency reuse is enhanced by synchronizing cell transmit/receive base stations in a cellular system to a common time base, and then sharing the available frequencies via allocated time slots. Cells using the same frequency that may interfere with each other are activated only during selected time intervals while same-frequency cells nearby are deactivated. The deactivated cells are then in turn activated while previously activated same-frequency cells nearby are deactivated. The frequency time slots may be of equal length, or longer time slots may be allocated to cells having higher usage rates, as determined in any of a number of ways. The time slots may be mutually exclusive, or may overlap. The time sharing technique of the present invention allows design of cell systems with many reuse patterns.Type: GrantFiled: October 20, 1999Date of Patent: February 13, 2001Assignee: Cirrus Logic, Inc.Inventors: Steven H. Gardner, Sheldon L. Gilbert, Carl Thomas Hardin, James E. Petranovich
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Patent number: 6122527Abstract: A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.Type: GrantFiled: January 17, 1996Date of Patent: September 19, 2000Assignee: ADC Telecommuncations, Inc.Inventors: Mark T. Robinson, Steven H. Gardner, Matt Wong, Seton P. Kasmir, Kumar Balachandran, Sue Graham, Gail Schjelderup, Roy Franklin Quick, Jr.
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Patent number: 6038455Abstract: A time sharing method and apparatus for frequency reuse in cellular communication systems. Frequency reuse is enhanced by synchronizing cell transmit/receive base stations in a cellular system to a common time base, and then sharing the available frequencies via allocated time slots. Cells using the same frequency that may interfere with each other are activated only during selected time intervals while same-frequency cells nearby are deactivated. The deactivated cells are then in turn activated while previously activated same-frequency cells nearby are deactivated. The frequency time slots may be of equal length, or longer time slots may be allocated to cells having higher usage rates, as determined in any of a number of ways. The time slots may be mutually exclusive, or may overlap. The time sharing technique of the present invention allows design of cell systems with many reuse patterns.Type: GrantFiled: August 29, 1996Date of Patent: March 14, 2000Assignee: Cirrus Logic, Inc.Inventors: Steven H. Gardner, Sheldon L. Gilbert, Carl Thomas Hardin, James E. Petranovich
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Patent number: 5946624Abstract: A synchronized frequency hopping method and apparatus for use in a cellular communication system where the cellular communication systems has a plurality of cells and a plurality of frequencies available to be assigned to the cells. At predetermined times, cells in the system synchronously change or hop to a new frequency. The new frequency to which a cell hops to may be a function of the present frequency the cell is assigned. In addition, synchronized frequency hopping may occur at predetermined intervals and the pattern of hopping may periodically repeat. This technique limits the period of time a non-system source of interference may impair communications in any cell since the cell hops to different frequencies periodically.Type: GrantFiled: August 29, 1996Date of Patent: August 31, 1999Assignee: Pacific Communication Sciences, Inc.Inventors: James E. Petranovich, Sheldon L. Gilbert, Steven H. Gardner
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Patent number: 5819182Abstract: A method and apparatus for improving the signal-to-interference ratio and signal-to-noise ratio of a signal transmitted on a reverse channel from a mobile transmitter in a land mobile communications system by using a sectored cell in which the same channel is received by each sector of the cell. Each directional antenna is coupled to a unique associated receiver tuned to the same frequency or frequencies as the other receivers associated with each other directional antenna within the same sectored cell. Depending upon the location of the mobile end system with respect to the antenna pattern of each directional antenna, each signal will typically be redundantly received over more than one, but less than all, of the antennas. In accordance with the present invention, only one of the received signals is to be communicated from the base station to an intermediate system and all others are to be discarded.Type: GrantFiled: November 13, 1995Date of Patent: October 6, 1998Assignee: Pacific Communication Sciences, Inc.Inventors: Steven H. Gardner, Carl Thomas Hardin
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Patent number: 5729557Abstract: A method and apparatus for using multiple code rates for forward error correction in a cellular digital data radio communication system. Each base station broadcasts a quantity called the power product (PP), which is equal to the base station transmit power, P.sub.BT, multiplied by the power level received at the base station, P.sub.BR. For a mobile unit to determine its appropriate transmit power, P.sub.MT, requires measuring the power received, P.sub.MR, at the mobile unit and performing the following calculation: P.sub.MT ==PP/P.sub.MR. When channel path loss is large, it is possible that the power control calculation will return a value greater than the maximum transmit power capability of the mobile unit. In such a case, the mobile unit selects a lower code rate. Base station receiver sensitivity improves as the code rate decreases, so the result is similar to increasing the transmitter power. In the preferred embodiment, the invention uses 3 different code rates.Type: GrantFiled: October 12, 1995Date of Patent: March 17, 1998Assignee: Pacific Communication Systems, Inc.Inventors: Steven H. Gardner, James E. Petranovich, C. Thomas Hardin