Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8107511 | Apparatus and method for intelligent frequency-hopping discovery and synchronization A process control system or other system includes multiple nodes that communicate using frequency-hopping patterns. Each node may operate using its own frequency-hopping pattern. Each node may also broadcast information identifying its frequency-hopping pattern to o... | 01/31/2012 |
| 7940830 | Fast hopping frequency synthesizer Apparatus and systems for synthesizing frequencies for use in a fast hopping wireless communications system. A frequency synthesizer comprises a plurality of oscillators with each oscillator having a first input coupled to a reference clock frequency signal, and a s... | 05/10/2011 |
| 7899106 | Mitigating OFDM receiver interference caused by intermittent signal transmission Degradation of the OFDM signal carrying DVB-H content, caused by GSM burst transmission, is overcome without the need for hardware to constrain the GSM transmission spectrum by the modulating of the OFDM signal and utilizing the interleaving and Forward Error Correc... | 03/01/2011 |
| 7889777 | System and method for data transfer in frequency hopping wireless networks A frequency hopping coordinator device scans a plurality of frequencies for request for services messages during an unused time slot in order to detect a request for service preamble on one of the frequencies and, responsive thereto, send a service packet message to... | 02/15/2011 |
| 7817706 | Method and apparatus to perform reactive jamming while simultaneously avoiding friendly pseudo-random frequency hopping communications Method and Apparatus to Perform Reactive Jamming While Simultaneously Avoiding Friendly Pseudo-Random Frequency Hopping Communications is disclosed. The system provides an enhancement to surgical reactive jammers that combines near-real-time jamming capability with ... | 10/19/2010 |
| 7639727 | System and method for selecting wireless signal bandwidth based on signal strength measurements provided by wireless receivers A method and system are provided which combine (i) adaptive multi-rate half-rate transmission and (ii) intelligent frequency hopping wherein frequency hopping and intelligent underlay overlay are used simultaneously. In the latter, frequency hopping is controlled on... | 12/29/2009 |
| 7577181 | Frequency hopping spread spectrum system with high sensitivity tracking and synchronization for frequency unstable signals A wireless spread spectrum communication system for transmitting data includes a plurality of end point transmitters and at least one receiver. The end point transmitters transmit data via a frequency hopped spread spectrum signal where the transmitting signal is se... | 08/18/2009 |
| 7561613 | Digital carrier multi-band user codes for ultra-wideband multiple access Techniques are described for generating digital carrier multi-band user codes for a baseband ultra-wideband (UWB) signal. The digital carrier multi-band user codes comprise spreading codes that enable multiple access in a UWB system. The user codes are digital, lead... | 07/14/2009 |
| 7433678 | Method and system for rapidly setting up a communication between a disk drive and a plurality of communicating objects The invention concerns a method and a system for rapidly establishing a communication, particularly a Bluetooth type communication, between at least one reader and a plurality of communicating objects. Each communicating object and said reader have a communication p... | 10/07/2008 |
| 7426175 | Method and apparatus for pilot signal transmission Pilot sequences are constructed from distinct “classes” of chirp sequences that have an optimal cross correlation property. Utilization of chirp sequences for pilot sequences results in pilot sequences that have optimal or nearly-optimal cross correlation and au... | 09/16/2008 |
| 7406114 | Pseudo-noise correlator for GPS spread-spectrum receiver A terrestrial C/A code GPS receiver system digitally samples, filters and stores a segment of 11 half chips of the received composite as a binary number and multiplexes this number for parallel correlation with each of a series of multibit code replicas for the sate... | 07/29/2008 |
| 7400867 | Radio broadcast receiver A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a reception signal of a sub antenna is less than a predetermined threshold valu... | 07/15/2008 |
| 7397842 | Method and apparatus for combining weight computation in a DS-CDMA RAKE receiver A RAKE receiver circuit generates combining weights based on channel estimates and combining statistics that comprise channel coefficient statistics, noise statistics, and channel estimation error statistics. Together, these statistics incorporate the relationships ... | 07/08/2008 |
| 7388901 | Method for receiving spectrum spreading signals with frequency shift correction A method for receiving spectrum spreading signals using a Doppler-effect frequency-shift correction generates a corrective signal based on an estimation of a modulation period related to the Doppler effect detected in a preamble portion of a received signal. The cor... | 06/17/2008 |
| 7386026 | Method and system for synchronizing and selectively addressing multiple receivers in a wireless, spread spectrum communication system A system and method for synchronizing and selectively addressing multiple receivers in a wireless communication system includes a spread spectrum transmitter and one or more spread spectrum receivers. The transmitter transmits a signal having an observable parameter... | 06/10/2008 |
| 7379447 | Slotted seeded channel hopping for capacity improvement in wireless networks A system and method that increases the capacity of a wireless network using frequency diversity. A user switches between channels of a network using a single network interface card in such a manner that nodes desiring to communicate overlap while disjoint communicat... | 05/27/2008 |
| 7373117 | Power control in telecommunications networks A radio frequency transmitter is power controlled using a controlling system including an integrating controller, together with an inner and an outer control loop. A tracking signal supplied by the inner loop to the integrating controller of the outer loop is used t... | 05/13/2008 |
| 7373167 | Apparatus and method for optimizing transmission power of network An apparatus and a method for performing a protocol that optimizes a transmission power in a network. The apparatus and the method perform a protocol that optimizes the transmission power in the network for point-to-multipoint communication (1:N). The apparatus incl... | 05/13/2008 |
| 7373166 | Apparatus and method for optimizing transmission power of network An apparatus and a method for performing a protocol that optimizes a transmission power in a network. The apparatus and the method perform a protocol that optimizes the transmission power in the network for point-to-multipoint communication (1:N). The apparatus incl... | 05/13/2008 |
| 7373165 | Apparatus and method for optimizing transmission power of network An apparatus and a method for performing a protocol that optimizes a transmission power in a network. The apparatus and the method perform a protocol that optimizes the transmission power in the network for point-to-multipoint communication (1:N). The apparatus incl... | 05/13/2008 |
| 7369830 | Monolithic GPS RF front end integrated circuit A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Fil... | 05/06/2008 |
| 7369576 | Managing scanning and traffic in a network The present invention provides a network communication device and method for simultaneous connection establishment and traffic delivery in a network. The network communication device comprises a first interface for exchanging information with a network device, a sec... | 05/06/2008 |
| 7366224 | System and method for the detection of presence of a signal and its synchronization, for a frequency hopping system working in a disturbed environment A method and device are disclosed for the detection and synchronization of a signal in a frequency-hopping system. The method has a step, for each frequency F(1) . . . F(M), of selecting the K samples corresponding to the greatest values of the signal, and th... | 04/29/2008 |
| 7356094 | Digital broadcast receiving apparatus A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance with a frequency of a broadcast channel by a signal transmission contr... | 04/08/2008 |
| 7356561 | Adaptive sleeping and awakening protocol for an energy-efficient adhoc network In a multiple node network, the method includes waking up at least one node from a sleep mode during at least one associated slot of a time-slotted frame, the sleep mode being a low power consumption mode. Also, in at least one node of a multiple node network, the p... | 04/08/2008 |
| 7349339 | Method for operating an ad-hoc network for the wireless data transmissions of synchronous and asynchronous messages A method for operating an ad-hoc network for the wireless data transmission of synchronous and asynchronous messages synchronizes the transmitters and receivers of neighboring nodes on a transmission path using cyclically transmitted identifiers, whose intervals def... | 03/25/2008 |
| 7349381 | Synchronization technique for spread spectrum frequency hopped data links and radios using the same A method of obtaining coarse synchronization in a frequency hopped/direct sequence spread spectrum (FH/DSS) time division multiple access (TDMA) data link network includes tuning the receiver to a first frequency used in the data link network. Then, signal strength ... | 03/25/2008 |
| 7346070 | Shared wireline code division multiple access A first network component of an apparatus in one example is coupled with one or more additional network components. The first network component and the one or more additional network components communicate with one another over a single, shared wireline path through... | 03/18/2008 |
| 7346094 | System and method for transmitting data and additional information simultaneously within a wire based communication system A system and method is provided for transmitting data signals and additional information signals having partially overlapping frequency bands simultaneously within a wire based communication system over the same wired medium using a spread spectrum technique for mod... | 03/18/2008 |
| 7343145 | Radio control system for models In conventional radio controlled models, a receive frequency is changed with a changeover switch mounted in a receiver body. In the present invention, a frequency switching scheme, employing a radio system in which a transmitter switches the receive frequency, is pr... | 03/11/2008 |
| 7340630 | Multiprocessor system with interactive synchronization of local clocks A multiprocessor computer system comprises multiple data processors, each with an internal clock for providing time stamps to application software. The processors take turns as synchronization masters. The present master transmits a “request” time stamp (indicat... | 03/04/2008 |
| 7336696 | Acquisition of a code modulated signal The invention relates to an apparatus supporting an acquisition of a received code modulated signal by determining the correlation between the received code modulated signal and an available replica code sequence at different code phases. It is proposed that the app... | 02/26/2008 |
| 7336924 | Broadcast type service system using bluetooth type radio network In a broadcast type service system using communications according to Bluetooth specification, a reception information providing device is provided in order to receive a reception establishing information of each transmission device transmitted from each transmission... | 02/26/2008 |
| 7327717 | Wireless LAN receiver synchronization A WLAN (Wireless Local Area Network) receiver is provided that provides at least two acquisition units and at least two tracking units. The acquisition units perform a synchronization acquisition process, and the tracking units perform a synchronization tracking pro... | 02/05/2008 |
| 7324578 | Method and apparatus for transmitting and receiving information about spreading codes used for a packet data channel in a communication system A method and apparatus for efficiently transmitting and receiving information about spreading codes used for a packet data-transmitting channel in a spread spectrum communication system. A BS determines Walsh codes for spreading a PDCH and transmits on a PDCCH an in... | 01/29/2008 |
| 7321645 | Method and arrangement for detecting a random access channel preamble using multiple antenna reception in a communication system In a method and arrangement for detecting a random access channel preamble in a received uplink signal, the uplink signal is received at one or more receive antennas and contains data related to a random access channel preamble. The received uplink signal is subject... | 01/22/2008 |
| 7315587 | Demodulation method and apparatus based on differential detection system for π/4 shifted QPSK modulated wave A demodulator of a differential detection system for a π/4 shifted QPSK or DQPSK modulation wave in digital communication. The demodulator includes a differential detector connected to receive orthogonal components of the modulation wave, a corrector connected to r... | 01/01/2008 |
| 7313635 | Method and apparatus for simulating a load on an application server in a network A method is disclosed for simulating a load on an application server in a network. The method intercepts data packets of a request from a sender to a receiver. The data packets to be intercepted can be selected according to specified criteria, such as communications... | 12/25/2007 |
| 7313173 | Correlation detection method and apparatus, transmission diversity detection method and apparatus, each method and apparatus for detection within a small time unit One code is generated by combining (including addition) 2 or more codes, correlation detection method which detects the correlation by multiplying such a generated code by the reception data. In communication system based on W-CDMA method, first spreading code (a·C... | 12/25/2007 |
| 7312746 | Method and system for calibration of a radio direction finder A calibration method and a system for providing calibration data for use with a direction finder are provided. The method comprises providing a relative motion of a calibration receiver in a circle manner with respect to calibration transmitter at a predetermined di... | 12/25/2007 |
