Patent application number | Description | Published |
20090049159 | Method and Apparatus for Setting Up and Managing Operational Environment in P2P Wireless Networks - In a cognitive radio, a method of establishing an operational policy for use in a Peer-to-Peer (P2P) group, wherein the policy can be described by layers of policy parameters with progressively higher layers having a progressively increasing number of parameters, involves determining that a policy change is to be made from a current policy; requesting policy information from at least one P2P group member; receiving a policy description from the at least one P2P group member; and implementing a change in the lowest layer policy parameter to establish a new operational policy. | 02-19-2009 |
20090197627 | METHOD AND APPARATUS FOR CONTROLLING TRANSMIT POWER AND INCUMBENT PROTECTION IN A COGNITIVE RADIO SYSTEM - A cognitive radio (CR) device ( | 08-06-2009 |
20090245119 | COMMUNICATIONS SYSTEM FOR EXCHANGING SPECTRUM SENSING MEASUREMENTS THROUGH A DROP BOX AND METHOD OF USING SAME - A communications system and method for exchanging spectrum usage information through a drop box ( | 10-01-2009 |
20110156781 | DEVICE AND METHOD FOR PHASE COMPENSATION - A frequency generation unit is provided that permits a receiver to tune from channel to channel without cycle skipping and in which compensation for phase offset introduced during tuning is provided. The frequency generation unit includes a fractional-N synthesizer, a voltage controlled oscillator (VCO), and a direct digital synthesizer (DDS). The fractional-N synthesizer generates frequencies from the VCO as well as a temperature controlled crystal oscillator. Outputs from the fractional-N synthesizer are supplied both the VCO and the DDS to control the VCO and DDS. The combination of the voltage controlled oscillator and fractional-N synthesizer is perpetually locked. The fractional-N synthesizer is maintained in a locked condition. The VCO output is provided to the DDS. An output from the DDS or from the fractional-N synthesizer forms the output signal of the frequency generation unit. | 06-30-2011 |
20120163508 | SUBCARRIER PLACEMENT STRATEGY FOR A MULTI-CARRIER SIGNAL - Communication devices and methods for transmitting and receiving a wideband signal using aggregated discontiguous narrowband channels in a band are presented. During transmission, a fold point is determined in which symmetric free channels are sufficient to transmit the signal. The signal is then synthesized by aggregating the data in the channels and transmitted using the fold point as the up-conversion modulation frequency. During reception, information regarding which channels are being used to provide data signals and which channels are occupied by interferers is received. This information is used to determine one or more fold points as the down-conversion modulation frequencies. The fold points are selected such that an image of each interferer falls on an unoccupied channel or a narrowband channel occupied by another interferer. | 06-28-2012 |
20140155011 | DYNAMIC SUB-SAMPLING RADIO FREQUENCY MIXER SYSTEMS AND METHODS - A mixer, a receiver, and a method provide dynamic sub-sampling mixer which adjust a sub-sampling rate based on power drain and performance. A mixer includes mixer circuitry receiving an input of a Radio Frequency (RF) input signal and providing an output of a baseband signal of the RF input sampled at a sub-sampling rate, baseband parametric control circuitry receiving the baseband signal and measuring at least one parametric value of the baseband signal, and sampling period control circuitry receiving the at least one parametric value and adjusting the sub-sampling rate based thereon, the sub-sampling rate or ratio is adjusted minimize power drain while ensuring performance of the at least one parametric value is satisfying a predetermined level. | 06-05-2014 |
Patent application number | Description | Published |
20080304076 | SYSTEMS AND METHODS FOR PACKAGING AND MOUNTING READOUT AND LASER INTENSITY MONITOR SENSORS - Methods and apparatus for applying sensors to a ring laser gyro. An example apparatus includes a housing having a cavity, a laser intensity monitor (LIM) sensor mechanically and electrically connected within the cavity of the housing, and a readout sensor mechanically and electrically connected within the cavity of the housing. The LIM sensor and readout sensor are connected within the housing based on predetermined light output properties of a sensor mirror of a ring laser gyro. When the readout sensor is properly aligned with the sensor mirror, then the LIM sensor is automatically aligned with the sensor mirror. | 12-11-2008 |
20110199225 | USE OF TOKEN SWITCH TO INDICATE UNAUTHORIZED MANIPULATION OF A PROTECTED DEVICE - An apparatus to indicate unauthorized manipulation of at least one protected device enclosed in a housing is provided. The apparatus includes a structure attached to a first portion of the housing and a token switch attached to a second portion of the housing. The token switch is operably positioned with reference to the structure. The token switch includes a plunger, and a register programmed with a value. The register is communicatively coupled with a processor in a circuit. The circuit is communicatively coupled to drive the device. The structure, the token switch, and the circuit are internal to the housing when the housing is in a closed position. The plunger and the structure are positioned to generate a current when the housing is opened. The programmed value in the register is changed by the generated current and the processor takes an action responsive to the change in the programmed value. | 08-18-2011 |
20120026502 | VARIABLE PATH LENGTH CONTROL MODULATION FREQUENCY - A gyroscope system comprises a gyroscope block having a plurality of cavities and a plurality of passages that define a path; a plurality of mirrors each located in one of the plurality of cavities; at least one mirror drive coupled to one of the plurality of mirrors and configured to change a position of the respective mirror, wherein the path's length is changed by the change in the position of the respective mirror; a dither system coupled to the gyroscope block and configured to induce an angular rotation of the gyroscope block; and a controller configured to provide a dither signal indicative of a dither frequency to the dither system and a path length control (PLC) signal indicative of a PLC frequency to the at least one mirror drive. The controller is configured to calculate the PLC frequency as a function of the dither frequency. | 02-02-2012 |