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 |
| 7616712 | Systems and methods for detecting discontinuous transmission (DTX) using cyclic redundancy check results to modify preliminary DTX classification A received information signal is decoded to obtain the received information and to produce at least one feature of the received information signal. The received information signal is preliminarily classified as containing a normal burst or a truncated burst based up... | 11/10/2009 |
| 7457263 | Apparatus and method for channel request in a wireless communication system Apparatus and Method for Channel Request in a Wireless Communication System. The present invention provides a method to request channels in a wireless communication system in order to efficiently allocate channel resources by using channel function information about... | 11/25/2008 |
| 7440489 | Method and apparatus for selective demodulation and decoding of communications signals A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed... | 10/21/2008 |
| 7418063 | DTX detection method with high success probability A wireless communications system receiver classifies a received burst as a DTX-high state normal burst or a DTX-low state truncated burst with a high probability of success. D1, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a normal... | 08/26/2008 |
| 7408906 | Mobile data communications apparatus, methods and computer program products implementing cellular wireless data communications via a wireless local area network A mobile data communications system includes a cellular wireless data communications network, such as a GPRS or CDPD network, including a plurality of base stations that communicate with terminals according to a first radio interface. The plurality of base stations ... | 08/05/2008 |
| 7409028 | Clock synchronization in a communications environment A method and system provide a stable reference clock for use in a communication system. A phase-locked loop (PLL) receives an input clock signal with potentially unacceptable levels of jitter and wander. The PLL provides a synchronized output clock with significantl... | 08/05/2008 |
| 7315944 | Secure handling of stored-value data objects An approach to managing stored-value data objects, such as electronic tickets, comprises secure systems and procedures for ticket issuing, storage, and redemption. With these systems and procedures in place, stored-value data objects may be securely transferred to r... | 01/01/2008 |
| 7305211 | Satellite communications system using multiple earth stations A satellite communications system uses multiple ground stations and one or more satellites for communicating between mobile subscribers and a land-based communications network, such as the PSTN or the Internet. Multiple ground stations geographically dispersed minim... | 12/04/2007 |
| 7295536 | Systems and methods for soft handoff and other diversity communication using base stations supporting common radio configurations A wireless terminal and a first node communicate according to a first radio configuration of a first set of radio configurations supported by the first node. A second radio configuration that is available for a second node that supports a second set of radio configu... | 11/13/2007 |
| 7283797 | System and method of improving the dynamic range of a receiver in the presence of a narrowband interfering signal An apparatus, system, and method improve the dynamic range of a receiver in the presence of a narrowband interfering signal. An error rate of a received signal is computed, and the input intercept point of a low noise amplifier in the receiver is adjusted based on t... | 10/16/2007 |
| 7221958 | Received signal filtering for enhanced selectivity A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA si... | 05/22/2007 |
| 7221905 | Dual mode satellite cellular telephone systems A dual-mode telephone with a satellite communication adapter is disclosed. According to one embodiment of the present invention, a cellular-type handportable phone is equipped with a connector for the attachment of accessories. This connector provide a satellite com... | 05/22/2007 |
| 7209753 | Method to control the update frequency of a positioning device by a mobile terminal A mobile radiocommunications terminal contains or is operatively connected to a position estimator, such as a GPS receiver. The mobile terminal stores at least one reference position. The mobile terminal updates its position at a frequency that is a function of its ... | 04/24/2007 |
| 7209511 | Interference cancellation in a CDMA receiving system Transmitted signals from plurality of mobile terminals are received at one or more base stations in a Code Division Multiple Access system. The base stations send the received signals to a central processor in the form of complex signal sample streams. The central p... | 04/24/2007 |
| 7197282 | Mobile station loop-back signal processing Processing of loop-back information returned by one or more mobile stations that are served by a wireless communication network permits the network to compensate its transmit signals for increased transmission efficiency and reduced signal interference at the mobile... | 03/27/2007 |
| 7184425 | Enhanced mobile station positioning in a wireless communication network An approach to facilitating positioning operations or other designated tasks performed by mobile stations within a wireless communication network enables individual mobile stations to request “free” or idle time if the mobile station's current operations do not ... | 02/27/2007 |
| 7181242 | Systems and methods for communicating data at radio base station nodes Carrier data can be communicated between a carrier interface of the first radio base station node and a mobile switching center over a carrier bus according to a carrier protocol. In addition, bus data can be communicated between a bus interface of the first radio b... | 02/20/2007 |
| 7177299 | Wireless communications apparatus, methods and computer program products using broadcast control channel messaging First and second classes of broadcast information, which have different repetitive rates, are transmitted in repetitive shared blocks of a Packet Broadcast Control Channel (PBCCH) of a General Packet Radio Service (GPRS) wireless communications system. The first cla... | 02/13/2007 |
| 7158533 | Self-configuring wireless mobile data base stations and configuration operations and computer program products for same A wireless base station of a wireless mobile data communications system, such as a Mobile Data Base Station (MDBS) of a Cellular Digital Packet Data (CDPD) communications system, is configured. A packet, such as a frame relay frame, is communicated from a node of a ... | 01/02/2007 |
| 7155229 | Distributed wireless architecture using microcast A mobile communication system comprises a plurality of cells, with each cell including a network of microstations distributed more or less uniformly throughout the cell. A central controller connected to the network of microstations selects a group of microstations ... | 12/26/2006 |
| 7149534 | Peer to peer information exchange for mobile communications devices The invention discloses various methods whereby mobile communications devices, connected to a communications network can share data by acting as both clients and servers. Specifically contemplated is the sharing of GPS assistance data. Also disclosed is the formatio... | 12/12/2006 |
| 7142580 | Systems, methods, and computer program products for providing traffic frequency diversification in a cellular communication system A mobile terminal and a base station subsystem may communicate by assigning a primary or control frequency to the cell in which the mobile terminal is located and using that control frequency to exchange control information between the mobile terminal and the base s... | 11/28/2006 |
| 7133647 | Chiprate correction in digital transceivers A transceiver for a code division multiple access communication system comprises a receiver to receive coded information signals and a transmitter to transmit coded information signals. A local oscillator provides a time and frequency reference for the receiver and ... | 11/07/2006 |
| 7123936 | Cellular phone with expansion memory for audio and video storage A cellular telephone includes an internally integrated digital entertainment module. The telephone includes a transceiver unit and a headset which is connected to the transceiver unit by wired or wireless link. The entertainment module includes an interchangeable RO... | 10/17/2006 |
| 7114178 | Security system An access control system includes an access control device, a wireless communication device, and a central controller. The central controller issues authorization codes to the wireless communication device. The wireless communication device is used by an authorized ... | 09/26/2006 |
| 7113745 | Method to achieve diversity in a communication network A method of wirelessly communicating between units comprises using at least two repeaters between a transmit unit and a receive unit. The repeaters enable a diversity scheme to be emulated. ... | 09/26/2006 |
| 7113593 | Recursive cryptoaccelerator and recursive VHDL design of logic circuits A method and apparatus for performing cryptographic computations employing recursive algorithms to accelerate multiplication and squaring operations. Products and squares of long integer values are recursively reduced to a combination of products and squares reduced... | 09/26/2006 |
| 7085332 | Method and apparatus for two-user joint demodulation in a system having transmit diversity Method and apparatus for two-user join demodulation in a system having transmit diversity. A receiver includes at least a detector unit and a channel estimation unit, and exploits transmit diversity employed by at least one of two users or transmitters on a channel.... | 08/01/2006 |
| 7079515 | Signal decoding with and without second synchronization word in a mobile communication system A time division multiple access (TDMA) radio communication system (100) accommodates signal decoding by a mobile station (130) with and without a second synchronization word (214). The radio communication system includes at least one base statio... | 07/18/2006 |
| 7068976 | Method of verifying operation of listening control channel A base station tunes a transceiver to listen to accesses made by mobile terminals on the base station's own control channel. Once the functionality of the transceiver is verified by correlating the known accesses to the received accesses, the base station then tunes... | 06/27/2006 |
| 7069034 | Systems and methods for reduced forward link power control delay A communication system includes a mobile terminal and a base station. The mobile terminal estimates signal quality of a forward link during a first power control group period and determines a power control bit based on the estimated signal quality. The mobile termin... | 06/27/2006 |
| 7061999 | Systems and methods for detecting discontinuous transmission (DTX) using cyclic redundancy check results to modify preliminary DTX classification A received information signal is decoded to obtain the received information and to produce at least one feature of the received information signal. The received information signal is preliminary classified as containing a normal burst or a truncated burst based upon... | 06/13/2006 |
| 7061884 | Methods and systems for communicating data at radio base station nodes that provide efficient allocation of control timeslots A first frame of carrier data can be communicated between a first carrier interface of a first radio base station node and a mobile switching center over a first carrier bus. In addition, a first frame of bus data can be communicated having a first number of dedicat... | 06/13/2006 |
| 7054283 | Wireless network architechture and protocol for location services in GPRS packet data network A method and apparatus for transmitting a location service message between a location server and a mobile station or LMU in a GPRS wireless communications system. The location server generates a location service message and transmits the location service message to ... | 05/30/2006 |
| 7050575 | Echo canceler coefficient update apparatus and method An echo canceler and method for a communications system include an echo-containing signal input for receiving a signal and an echo-causing signal source for developing an echo-causing signal. A first filter coupled to the echo-containing signal input and the echo-ca... | 05/23/2006 |
| 7050802 | Cellular communication device with scanning receiver and continuous mobile communication system employing same A receiver receives communication signals on an assigned frequency channel while monitoring the signals received on other frequency channels. A communication processor processes the received communication signals from the current base station while a wideband digiti... | 05/23/2006 |
| 7046721 | System and method to enhance the capacity of a communication link A method and apparatus encodes data on a clock pulse signal by phase modulating a clock pulse signal by introducing a sinusoidal jitter modulation to the clock pulse signal to selectively introduce intentional jitter at clock pulse transitions, wherein the sinusoida... | 05/16/2006 |
| 7046970 | System and method of phase modulation control in RF signal generation Phase modulation control techniques and supporting apparatus avoid phase discontinuity at the outset of RF signal generation. Such discontinuities might arise from phase control instabilities associated with transmit start up or from abrupt changes in phase at the b... | 05/16/2006 |
| 7046654 | Efficient radio reception method for automatic frequency planning A network receiver is dynamically configurable to process access bursts received from mobile stations as both normal-type and abbreviated-type access bursts. With this capability, radio signal measurement data may be collected in the network cell or sector in which ... | 05/16/2006 |
| 7046738 | 8-PSK transmit filtering using reduced look up tables A method for generating a premodulation-filtered modulation waveform having a real part and an imaginary part for transmitting octal symbols uses a reduced lookup table. Successive octal symbols, each comprising three information bits, are input to a logic unit. The... | 05/16/2006 |
