Patents Examined by Jay K. Patel
  • Patent number: 7609778
    Abstract: In a method of data transmission according to one embodiment of the invention, data transitions on adjacent conductors are separated in time. In a method of data transmission according to another embodiment of the invention, signals on adjacent conductive paths pass through different alternating sequences of inversions and regenerations. In a method of data transmission according to a further embodiment of the invention, data transitions having the same clock dependence are separated in space.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: October 27, 2009
    Inventors: Karl Fecteau, Claude Thibeault, Yvon Savaria, Yves Blaquiere, Jean-Jacques Laurin, Zhong-Fang Jin
  • Patent number: 7394865
    Abstract: A signal constellation for wireline or wireless multi-carrier communication systems, such as systems using OFDM or MC-CDMA, has points separated from one another by maximizing a distance between conditional probability distributions, such as a Kullbeck-Leibler (KL) distance. Preferably, the constellation points are arranged in concentric circles, with or without a point at the origin, wherein adjacent circles are rotated to maximize an angular distance between points on adjacent circles. Pilot symbols inserted in the transmitted signal are used by a receiver to estimate the channel of the multi-carrier system. Different constellations show optimum performance for different signal to noise ratios, and for different numbers of taps used to estimate the channel, especially in a fast fading environment where there may be fewer pilots per OFDM or MC-CDMA symbol than channel taps.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: July 1, 2008
    Assignee: Nokia Corporation
    Inventors: Mohammad Jaber Borran, Prabodh Varshney, Jorma Lilleberg
  • Patent number: 7372803
    Abstract: A node within a mesh network includes an Optical Connection Controller (OCC) and a network element. When a connection path within the mesh network is required, an OCC determines if a particular connection path requires a network element to operate as a virtual gateway to separate the mesh network into separate protection domains for that particular connection path. A connection path might require separate protection domains in cases in which the number of network elements and/or repeater/amplifier components for a particular connection path is greater than a threshold, the total length of links for the connection path is above a threshold and/or another factor that could cause the recovery time for the connection path to increase beyond an acceptable threshold level. If the OCC determines that one or more virtual gateways are required for a particular connection path, the OCC selects an appropriate network element within the network to operate as a virtual gateway for that particular connection path.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: May 13, 2008
    Assignee: Nortel Networks Limited
    Inventors: Evert de Boer, James A. Shields, Richard Trudel, Malcolm Betts
  • Patent number: 7362793
    Abstract: A spread spectrum base station for receiving a plurality of spread spectrum signals and a plurality of phased spread spectrum signals includes an antenna and a plurality of delay devices connected to the antenna, each delay device outputting a time-delayed spread spectrum signal. A combiner is connected to the plurality of delay devices for combining the time-delayed signals and the phased signals, the combiner outputting a combined signal. An RF/IF section is connected to the combiner and converts the combined signal into in-phase (I) components and quadrature-phase (Q) components. A plurality of despreaders are connected to the RF/IF section, each despreader despreading the I and Q components of the combined signal into a despread signal. A controller is connected to each of the despreaders and controls a corresponding delay device.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: April 22, 2008
    Assignee: InterDigital Technology Corporation
    Inventor: Donald L. Schilling
  • Patent number: 7356023
    Abstract: A system and method for facilitating packetized calls between managed networks are disclosed. In one embodiment of a system incorporating teachings of the present disclosure, a mediation server may be associated with and maintain an information store holding a first collection of connection information for a first plurality of devices associated with a first managed internet protocol network and a second collection of connection information for a second plurality of devices associated with a second managed internet protocol network. The devices may be capable of receiving voice over internet protocol calls and the connection information for a given device may include a unique address and a call receipt rule. In operation, the mediation server may receive a query seeking appropriate connection information for a called device associated with the first managed internet protocol network.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: April 8, 2008
    Assignee: SBC Knowledge Ventures, L.P.
    Inventor: Robert Paul Lowmaster
  • Patent number: 7336739
    Abstract: A method, system, and computer program product are provided for detecting at least one signal of interest within an input signal. At least one set of samples from the input signal is multiplied by at least one set of samples representing a complex conjugate of the input signal to obtain a series of correlation samples. Sets of one or more consecutive correlation samples are summed to obtain a series of pulse sums. A plurality of non-consecutive pulse sums are integrated to obtain a search value.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: February 26, 2008
    Assignee: Lockheed Martin Corporation
    Inventors: Karen E. Petzold, Stephen C. Smith
  • Patent number: 7333452
    Abstract: A system and method for transmitting packet data in a communications system assigns an IP address to a terminal based on a network access identifier corresponding to the terminal, and then sends packet data to the terminal using the IP address. The terminal may be a simple IP user terminal or a mobile IP user terminal, and the packet data being sent preferably corresponds to an IP push service. In order to send the packet data, a protocol link is established between the terminal and network. Transmission of packet data on this link may be managed using an information table which relates information corresponding to the IP address to the network access identifier. This table is updated with information relating to the IP address when, for example, the network access identifier changes, when a point-to-point protocol timer expires, when an IP registration expires a location of the terminal changes.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: February 19, 2008
    Assignee: LG Electronics Inc.
    Inventor: Byung Keun Lim
  • Patent number: 7333422
    Abstract: The present invention discloses an optimal hardware implementation of the FFT/IFFT operation that minimizes the number of clock cycles required to compute the FFT/IFFT while at the same time minimizing the number of complex multipliers needed. For performing an N-point FFT/IFFT operation in N clock cycles, the optimal hardware implementation consists of several modules. An input module receives a plurality of inputs in parallel and combines the inputs after applying a multiplication factor to each of the inputs. At least one multiplicand generator is used to provide multiplicands to the system. At least two complex multiplier modules for performing complex multiplications are required with at least one of the complex multiplier modules receiving an output from the input module. Each of the complex multiplier modules receives multiplicands from the at least one multiplicand generator. Furthermore, at least one of the complex multiplier modules receives an output of another complex multiplier module.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: February 19, 2008
    Assignee: Zarbana Digital Fund LLC
    Inventor: Maher Amer
  • Patent number: 7333483
    Abstract: Embodiments of the invention include a universal integrated mobile gateway used in wireless communication networks to interconnect different networks, comprising: AMP for data collocation and state management for other modules, CCM for data switching network management (together with other modules) and control data frame switching between modules, CDP for storage and management of relay resource and global shared resources, SPCs for processing services in different networks, and network interface; CCM is connected with AMP, CDP, and SPCs through HDLC protocol; SPCs are connected to the network interface through TCP/IP protocol. The embodiments improve normalization and operability of network interconnection, facilitate unified settlement between different networks, and enhance overall resource utilization of the networks.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: February 19, 2008
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yongxiang Zhao, Lian Yang, Tao Peng, Zhijun Zhang, Xingwang Huang, Zhi Zeng, Wenxian Li
  • Patent number: 7327765
    Abstract: New version devices of a home phone line network may operate on a first carrier frequency (within the new version frequency band) while old version devices may operate at a second carrier frequency (within the old version frequency band). Preamble, header, and trailer portions of a new version signal include a plurality of spectral copies of a baseband modulated signal. One or more of these spectral copies of the baseband modulated signal is/are indistinguishable from corresponding components of an old version signal. The new version signal is transmit filtered to have a negatively sloping power spectral density in order to maintain a constant power level in relation to old version signals and to have slope that is opposite of binder crosstalk so as to form, with the average crosstalk, a constant level white noise floor.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: February 5, 2008
    Assignee: Broadcom Corporation
    Inventor: Eric J. Ojard
  • Patent number: 7321598
    Abstract: A tunnel setup protocol enables tunnel clients to set up IPv6-in-IPv4 networks to permit IPv6 nodes to communicate across the IPv4 network using IPv6 native packets. The tunnel setup protocol uses a control channel to negotiate tunnel configuration parameters and exchange tunnel configuration data between a tunnel client and a tunnel broker server. The tunnel setup is automatic, and migration to IPv6 is ameliorated.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: January 22, 2008
    Assignee: Hexago Inc.
    Inventors: Marc Blanchet, Florent Parent
  • Patent number: 7315540
    Abstract: A data switching circuit (10). The data switching circuit comprises at least one input (10in) for receiving during a same time period a plurality of data streams (ICH0-ICH127). Each of the data streams comprises a plurality of like-sized data quantities. The data switching circuit further comprises a plurality of addressable memories (10x), wherein each of the plurality of addressable memories comprises a plurality of memory cells. The data switching circuit further comprises circuitry (11) for writing into each of the plurality of addressable memories a copy of a same set of data quantities provided by the data streams during a first period of time. Lastly, the data switching circuit further comprises reading circuitry (13, 14), coupled to each respective one of the plurality of addressable memories, for reading during a second period of time a number of data quantities from the respective addressable memory and outputting the read data quantities to output channels.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: January 1, 2008
    Assignee: Texas Instruments Incorporated
    Inventor: Patrick W Bosshart
  • Patent number: 7304952
    Abstract: In a technique for performing flow control in a wide-area network, a user-specified flow control message such as a Pause message is provisioned at a first node, and a user-specified flow control message filter is provisioned at a second node coupled to the first node. At the first node, the availability of a buffer for data received from the second node is monitored, and in response to a predetermined availability condition, the provisioned flow control message is sent to the second node. In a Pause/Resume protocol, the buffer may be monitored for an Almost Full condition, and the flow control message may be a Pause message indicating that the first node should suspend transmission. The second node compares messages from the first node against the flow control message filter. Upon detecting the flow control message from the first node, the second node takes a predetermined flow control action with respect to the transmission of data to the first node.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: December 4, 2007
    Assignee: Applied Micro Circuits Corporation
    Inventor: Michael D. Scholten
  • Patent number: 7302018
    Abstract: Iterative detection for a MIMO (multiple-input, multiple-output) wireless communications system uses multiple stages for interference cancellation refinements. Detection is determined by maximizing signal to noise plus interference ratios. Equalization matrix updating uses a matrix-inversion-free recursion. For P transmitter antennas and Q receiver antennas, the soft symbol vector estimates are z=Fr?Gshard with F a P×Q IMMSE detector, r the received Q vector, and G a P×P interference canceller with shard hard decisions of prior symbols and iterations.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: November 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Srinath Hosur, Anand G. Dabak
  • Patent number: 7301893
    Abstract: Space-time block code with structure of a block STTD. 2×2 blocks allow partial orthogonality for low-complexity detection and optimized diversity gain and coding gain.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: November 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Anand G. Dabak
  • Patent number: 7289552
    Abstract: K data signals, or bursts, are transmitted over a shared spectrum in a code division multiple access communication format. A combined signal is received and sampled over the shared spectrum, as a plurality of received vector versions. The combined signal includes the K transmitted data signals. A plurality of system matrices and an associated covariance matrix using codes and estimated impulse responses of the K data signals is produced. Each system matrix corresponds to a received vector version. The system and covariance matrices are extended and approximated as block circulant matrices. A diagonal matrix of each of the extended and approximated system and covariance matrices are determined by prime factor algorithm-fast Fourier transform (PFA-FFT) without division of the matrix. The received vector versions are extended. A product of the diagonal matrices and the extended received vector versions is taken.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: October 30, 2007
    Assignee: InterDigital Technology Corporation
    Inventors: Jaeyoung Kwak, John W. Haim, Ariela Zeira, Jung-Lin Pan
  • Patent number: 7286617
    Abstract: A receiver and a method for receiving a signal including a carrier modulated with a known training sequence is described in which an estimate a carrier frequency offset is obtained from an autocorrelation signal by autocorrelation of the part of the received signal containing a known training sequence. The received signal is compensated with the frequency offset obtained to form a compensated received signal, and a timing reference for the received signal is obtained by cross-correlation of the compensated received signal with a known training sequence.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: October 23, 2007
    Assignee: STMicroelectronics N.V.
    Inventors: Yves Vanderperren, Wim Dehaene
  • Patent number: 7286619
    Abstract: The SIR values of multi-paths obtained by a transmission path estimator are accumulated by an integrator at very cycle of a pilot signal, an average value for sufficiently long period is calculated by an average value calculator, a reference value is divided by a divider and applied as a control coefficient to multipliers, where it is multiplied by the SIR values, and the weight values of multi-paths are obtained. As for the despreaded data from a despreading unit, the timing of all data is synchronized in buffers, the data is complex multiplied by the above-mentioned weight values in multipliers, and RAKE is synthesized by adding in an adder, and outputted as final demodulated data to a soft decision unit.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: October 23, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Motomitsu Yano
  • Patent number: 7274745
    Abstract: A channel equalizer for a single-carrier receiver interacting with a Trellis decoder and a channel equalization method therefor. The channel equalizer includes a first equalizer having a first feed forward (FF) unit for eliminating a pre-ghost of an input signal and a first feedback (FB) unit for eliminating a post-ghost of the input signal, a Trellis decoder for Trellis-decoding an output signal of the first equalizer, and a second equalizer having a second FF unit for eliminating the pre-ghost of the input signal and a second FB unit for eliminating the post-ghost of the input signal based on a signal decoded by the Trellis decoder. The first and second equalizers, interacting with the Trellis decoder, enable the equalization performance and speed of the channel equalizer to be enhanced.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: September 25, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Yong-sik Kwon, Jin-hee Jeong
  • Patent number: 7274737
    Abstract: A signal equalizer that employs micro-electromechanical machine devices for the tap weight controllers. The equalizer includes a substrate on which is formed a forward transmission line rail and a return transmission line rail. A cantilever stanchion is also formed on the substrate that runs parallel with the transmission line rails. A series of spaced apart cantilevers are pivotally mounted to the cantilever stanchion, and extend over the transmission line rails to define a gap therebetween. A weight tap line is coupled to each cantilever, and is responsive to a DC weight signal that controls the position of the cantilever to set the gap between the cantilever and the transmission line rails. A distorted signal is coupled from the forward transmission line rail to the return transmission line rail through the cantilevers.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: September 25, 2007
    Assignee: Northrop Grumman Corporation
    Inventors: Eric L. Upton, James M. Anderson