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| Number | Title | Issue Date |
| 7764664 | Modified start frame delimiter detection A modified approach to detecting the start frame delimiter (SFD) is disclosed. A receiving system scans a decoded but not yet de-scrambled received signal for a scrambled version of the SFD associated with the preamble format being used. Using this approach, it is n... | 07/27/2010 |
| 7688864 | Dynamic preamble detection A system and method are disclosed for dynamic preamble detection. A subset of the bits comprising the synchronization portion of the preamble are decoded, de-scrambled, and analyzed to determine dynamically which preamble format is being used. The source data values... | 03/30/2010 |
| 7505479 | Method and apparatus for bandwidth and frequency management in the U-NII band The present invention provides an apparatus and method for optimizing power in order to increase capacity. Rather than having any terminal device limited to a specific maximum data rate, instead the terminal device data rate is limited by the power being used, such ... | 03/17/2009 |
| 7185196 | Key caching system A key-caching system retrieves actively used keys from a relatively fast cache memory for fast processing of wireless communications. Additional keys are stored in relatively slow system memory that has high storage capacity. As keys become needed for active use, th... | 02/27/2007 |
| 7158542 | Dynamic preamble detection A system and method are disclosed for dynamic preamble detection. A subset of the bits comprising the synchronization portion of the preamble are decoded, de-scrambled, and analyzed to determine dynamically which preamble format is being used. The source data values... | 01/02/2007 |
| 7120166 | Scalable communication system using overlaid signals and multi-carrier frequency communication A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes ... | 10/10/2006 |
| 7057635 | High-speed RF link for a multi-user meeting A high-speed RF link connects multiple users with individual data appliances to a projection system in a multi-user meeting. The RF link enables high-speed transmission of graphics data in either compressed or uncompressed form to the projection system where applica... | 06/06/2006 |
| 7035589 | Method and system for tracking and mitigating DC offset in the presence of carrier frequency offsets A method and system for reducing the DC offset in a receiver in the presence of carrier frequency offset between the transmitter and the receiver. The present invention utilizes the knowledge of the carrier frequency offset to determine the phase difference between ... | 04/25/2006 |
| 6999443 | Hardware MAC A Hardware MAC (Media Access Control) unit implements time-critical functions according the 802.11 standard for telecommunications, thereby enhancing system performance. The MAC layer includes three sub-layers: MLME (MAC Sublayer Management Entity), which connects t... | 02/14/2006 |
| 6961545 | Method and system for providing antenna diversity An antenna switch diversity algorithm, and systems and methods to provide antenna diversity by implementing the algorithm in, for example, an IEEE 802.11a compliant environment, are presented. In accordance with the algorithm, one antenna of at least two antennas is... | 11/01/2005 |
| 6954171 | Method and apparatus for physical layer radar pulse detection and estimation Radar Pulse detection and radar signal length detection are used to detect and provide information for identifying radar signals. Pulse detection estimates a radar pulse size when it is too short for meaningful measurement. Pulse detection identifies a radar by iden... | 10/11/2005 |
| 6940865 | System and method for interleaving frames with different priorities A method of queue management includes: adding entries having a first priority to a first software queue; adding entries having a second priority to a second software queue; reading entries from the first software queue to a physical queue; at a threshold time, flush... | 09/06/2005 |
| 6928127 | Frequency synthesizer with prescaler A frequency synthesizer and a method for frequency synthesis are disclosed. The frequency synthesizer comprises a voltage controlled oscillator for generating an output signal having a synthesized frequency, and a prescaler connected to the VCO for receiving the out... | 08/09/2005 |
| 6894563 | Automatic control of amplifier gain using degeneration A technique for automatically controlling the gain of an amplifier by using a transistor as a voltage controlled variable degeneration resistor. The apparatus and method may be advantageously adapted for use in either voltage-to-current amplifiers or voltage-to-volt... | 05/17/2005 |
| 6891496 | Method and apparatus for physical layer radar pulse detection and estimation Radar Pulse detection and radar signal length detection are used to detect and provide information for identifying radar signals. Pulse detection estimates a radar pulse size when it is too short for meaningful measurement. Pulse detection identifies a radar by iden... | 05/10/2005 |
| 6883227 | Method of manufacturing a side stem monopole antenna Methods of manufacturing an antenna are presented. The antenna is capable of being mounted on a printed circuit board. In accordance with the method, the design dimension of a unitary piece of material are selected according to an operating wavelength. The unitary p... | 04/26/2005 |
| 6870815 | Methods for implementing a dynamic frequency selection (DFS) and a temporary channel selection feature for WLAN devices Various regulatory domains promulgate standards to define how wireless devices should operate in certain frequency bands. The 5 GHz spectrum is of particular importance to certain regulatory domains because of radar systems also operating in this spectrum. To avoid ... | 03/22/2005 |
| 6853197 | Method and apparatus for insuring integrity of a connectorized antenna An antenna is provided with an electronic component or circuit that has a value corresponding to properties of the antenna. A read mechanism reads the value and sets an operational status of a transceiver based on the value. In one embodiment, electronic component i... | 02/08/2005 |
| 6850117 | CMOS transceiver having an integrated power amplifier The present invention provides a breakdown resistant transistor structure for amplifying communication signals. This structure includes a first NMOS transistor having a source connected to ground and a first gate for receiving the input radio frequency signal. The f... | 02/01/2005 |
| 6810093 | Sequence detection A system and method are disclosed for recovering a current data symbol that is part of a sequence of data symbols from a received signal. Recovering the current data symbol includes determining a set of candidate current data symbols from a set of possible current d... | 10/26/2004 |
| 6807146 | Protocols for scalable communication system using overland signals and multi-carrier frequency communication A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes ... | 10/19/2004 |
| 6795407 | Methods for controlling shared access to wireless transmission systems and increasing throughput of the same A wireless communication system implements a calibration mode by which individual nodes in the system can determine which other nodes in the system are physically close to them and therefore can be reached with less than full transmitting power. Nodes which can comm... | 09/21/2004 |
| 6784740 | Power amplifier A system and method are disclosed for providing amplification to an input signal. The amplifier comprises an amplification stage configured to provide a gain to an input signal and to produce an amplified output, wherein the amplification stage includes an interface... | 08/31/2004 |
| 6785523 | Self-correlation detection in automatic gain calibration An embodiment of the present invention provides an automatic gain control system for a wireless receiver that quickly differentiates desired in-band signals from high power out-of-band signals that overlap into the target band. The system measures power before and a... | 08/31/2004 |
| 6779261 | Integrated balun and transformer structures A method for producing an on-chip signal transforming device. The method includes providing a substrate, and laying a first conductive layer above the substrate, wherein the first conductive layer has a plurality of interleaved inductors. The method then includes la... | 08/24/2004 |
| 6781425 | Current-steering charge pump circuit and method of switching A current-steering charge pump circuit and method for switch timing that reduces the amount of switching transients on an output current pulse produced by the charge pump. The current-steering type charge pump circuit includes four control signals, UP, UPB, DN and D... | 08/24/2004 |
| 6765441 | Differential amplifier A differential amplifier and a method for amplifying an input signal are disclosed. The differential amplifier comprises an amplification stage configured to amplify an input signal to produce an amplified output, a current source configured to provide a bias curren... | 07/20/2004 |
| 6762703 | Sigma delta modulator A system and method are disclosed for providing noise reduction in a sigma delta modulator. Reducing the noise comprises inputting a signal to a plurality of modulator stages; feeding back the signal within at least one of the modulator stages through a feedback loo... | 07/13/2004 |
| 6747605 | Planar high-frequency antenna The present invention provides a planar antenna having a scalable multi-dipole structure for receiving, and transmitting high-frequency signals, including a plurality of opposing layers of conducting strips disposed upon either side of an insulating (dielectric) sub... | 06/08/2004 |
| 6741219 | Parallel-feed planar high-frequency antenna The present invention provides a planar antenna having a scalable multi-dipole structure for receiving, and transmitting high-frequency signals, including a plurality of opposing layers of conducting strips disposed upon either side of an insulating (dielectric) sub... | 05/25/2004 |
| 6737920 | Variable gain amplifier The present invention provides a variable gain amplifier with a plurality of gain stages in which each of the gain stages is implemented using a circuit that implements a neutralization approach. This variable gain amplifier provides stable operation characteristics... | 05/18/2004 |
| 6734828 | Dual band planar high-frequency antenna A dual mode, substantially planar antenna utilizes a dipole or monopole structure for receiving and transmitting high-frequency signals. Layers of conductive strips are disposed on opposite sides of an insulating (dielectric) substrate, such as printed circuit board... | 05/11/2004 |
| 6731176 | Synthesizer with lock detector, lock algorithm, extended range VCO, and a simplified dual modulus divider The present invention provides a synthesizer having an efficient lock detect signal generator, an extended range VCO that can operate within any one of a plurality of adjacent characteristic curves defined by a plurality of adjacent regions, and a divide circuit imp... | 05/04/2004 |
| 6718619 | Method of manufacturing a central stem monopole antenna Methods of manufacturing an antenna are presented. The antenna is capable of being mounted on a printed circuit board. In accordance with the method, the design dimension of a unitary piece of material are selected according to an operating wavelength. The unitary p... | 04/13/2004 |
| 6721547 | In-band and out-of-band signal detection for automatic gain calibration systems An embodiment of the present invention provides an automatic gain control system for a wireless receiver that quickly differentiates desired in-band signals from high power out-of-band signals that overlap into the target band. The system measures power before and a... | 04/13/2004 |
| 6697375 | Method and apparatus for bandwidth and frequency management in the U-NII band The present invention provides an apparatus and method for optimizing power in order to increase capacity. Rather than having any terminal device limited to a specific maximum data rate, instead the terminal device data rate is limited by the power being ... | 02/24/2004 |
| 6697013 | Radar detection and dynamic frequency selection for wireless local area networks A system for detecting and avoiding interference with radar signals in wireless network devices is described. The receiver circuit of the device receives incoming 5 GHz traffic. Such traffic could comprise both WLAN traffic as well as radar signals from r... | 02/24/2004 |
| 6677779 | Flexible control interface for integrated circuit A control interface, which includes both master and slave devices, can provide buffering of input data packets, thereby allowing configurations of the integrated circuit to be modified quickly and efficiently. Additionally, the control interface can be si... | 01/13/2004 |
| 6628673 | Scalable communication system using overlaid signals and multi-carrier frequency communication A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the sysiem's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data ... | 09/30/2003 |
| 6621370 | Method and system for a lumped-distributed balun Systems to provide and methods to design a printed lumped-distributed balun are presented. A lumped-distributed balun includes a single-ended port, a first differential port, a second differential port, a first phase shifter circuit, and a second phase sh... | 09/16/2003 |
