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| Number | Title | Issue Date |
| 6243369 | Apparatus and method for synchronizing an SCDMA upstream or any other type upstream to an MCNS downstream or any other type downstream with a different clock rate than the upstream A bidirectional digital data communication system which generate phase coherent upstream clock and carrier signals from recovered downstream clock generated from a master clock in a central unit. The preferred species uses any downstream clock rate and ge... | 06/05/2001 |
| 6243412 | Adaptive array transmitter receiver Received baseband signals from a plurality of antennas 111 to 11Q are linearly combined through multiplication by weighting coefficients, then a decision signal is delayed for one symbol duration, and the delayed signal is multiplied... | 06/05/2001 |
| 6236674 | Transceiver control with sleep mode operation A transceiver which keeps circuitry associated with a receiver in a powered down state during periods when a Received Signal Strength Indicator (RSSI) indicates that a signal being received is below a pre-determined threshold level, and which begins to po... | 05/22/2001 |
| 6236676 | Intelligent adaptive modulation system A system and apparatus for enabling modems having incompatible modulation methods to communicate with one another. The adaptive modulation system is adapted to enable a first communications device having a first modulation method to communicate with a sec... | 05/22/2001 |
| 6232909 | Communication network optimization tool This invention identifies a process for determining the performance of radio frequency (RF) links in the Army's Enhanced Position Reporting System (EPLRS) with a high level of statistical confidence. The method includes determining a statistical differenc... | 05/15/2001 |
| 6229845 | Bus driver with data dependent drive strength control logic A transceiver circuit for transmitting a data signal over a communications bus at a predefined bit rate includes a transmitter. The data signal is a digital signal having first and second logic levels. The transmitter receives and modifies the data signal... | 05/08/2001 |
| 6219374 | Structure of a coherent dual channel QPSK transceiver using pilot symbols in a code division multiple access system The present invention proposes a structure of a coherent dual-channel QPSK transceiver using pilot symbols in a code division multiple access system, which can reduce the variation width of the entire transmission signal by putting pilot symbols into data... | 04/17/2001 |
| 6215816 | Physical layer interface device A single chip dual function 10 Base-T/100 Base-X physical layer interface device (PHY) compatible with existing 5 V parts is provided. The PHY includes a media-independent interface (MII) and connects to an unshielded twisted pair cable via an isolation t... | 04/10/2001 |
| 6212224 | MIL-STD-1553 buffer/driver A bus buffer conditions and amplifies bi-directional electrical signals on a line carrying MIL-STD 1553 bi-polar signals. The device includes a receiver with a threshold detector, a signal conditioner including a retiming circuit and an amplifying transmi... | 04/03/2001 |
| 6208686 | System and method for dynamic amplitude adjustment of modulating signal in frequency modulated transceivers A system and method for dynamically optimizing occupied bandwidth of a direct modulated FM radio comprises a remote receiver that periodically monitors the received output of a local transmitter and compares the received output occupied bandwidth to a ref... | 03/27/2001 |
| 6205171 | Antenna selector switch A wireless LAN RF module uses a low power transistor switchable voltage divider circuit to control the bias input of a GaAs MESFET output power amplifier. This bias control circuit provides stable, high speed on-off switching of the power amplifier stage ... | 03/20/2001 |
| 6205170 | Transmission/reception unit with bidirectional equalization The present invention refers to a transmission/reception unit that exchanges data with a remote unit by means of a channel using distributed modulation/demodulation treatment means. The transmission/reception unit includes equalization means (23) to equal... | 03/20/2001 |
| 6205133 | Flexible wideband architecture for use in radio communications systems A wideband digital architecture for use in radio communications systems. In an exemplary embodiment, a central hub station is coupled by high speed digital data transports to multiple distributed radio transceivers. The radio transceivers are designed to ... | 03/20/2001 |
| 6198783 | System for wireless serial transmission of encoded information The present invention provides a method for transmission of serial information over a wireless channel. The method includes modulating bits of information at selected parts of each cycle of a carrier waveform. At the receiving side, the selected parts of ... | 03/06/2001 |
| 6188750 | Impedance blocking filter circuit An impedance blocking filter circuit is provided for use in telecommunication systems for interconnecting between incoming telephone lines and customer's terminal equipment so as to unconditionally block impedances above 20 KHz due to the customer's termi... | 02/13/2001 |
| 6181734 | Multiple waveform software radio A radio is disclosed in which different waveforms may be utilized. The radio includes a memory (801) in which software (802, 805, 806) for specific waveforms is stored. The radio further includes one or more processors (807, 809, 811) which extract wavefo... | 01/30/2001 |
| 6178206 | Method and apparatus for source synchronous data transfer A method and apparatus is presented where for transmitting data between two or more components. Data signals are sent in parallel with a clocking signal (e.g., on a bus) so that the data signal can be latched in relation to the clocking signal. For exampl... | 01/23/2001 |
| 6175589 | Method and apparatus for communicating information A method and apparatus for communicating information between a remote location and a user. Information from the remote location or the user is received by the inventive apparatus and processed by configurable circuitry to a form that can be received and u... | 01/16/2001 |
| 6173159 | Wireless spread spectrum ground link-based aircraft data communication system for updating flight management files A system and method updates flight management files in accordance with the present invention and provides a retrievable record of the flight performance of an aircraft. A flight management computer is positioned on board the aircraft and interfaces and pr... | 01/09/2001 |
| 6167077 | Using multiple high speed serial lines to transmit high data rates while compensating for overall skew A transceiver pair is connected by a plurality of high speed serial lines that are tightly integrated into an enhanced communications system. The communications system includes a base transceiver, a remote transceiver, and a plurality of high speed serial... | 12/26/2000 |
| 6167239 | Wireless spread spectrum ground link-based aircraft data communication system with airborne airline packet communications An airline packet network transfers flight data files among respective airborne aircraft in flight. The network includes a plurality of aircraft each having a ground data link unit that includes a data store to accumulate and store flight data files and f... | 12/26/2000 |
| 6163585 | Phase-locked loop circuit and radio communication apparatus using the same A phase-locked loop circuit includes a current output type phase comparator for converting a phase difference between a first signal and a second signal into a current signal to be outputted, a low pass filter for filtering the current signal of the curre... | 12/19/2000 |
| 6163681 | Wireless spread spectrum ground link-based aircraft data communication system with variable data rate A system and method of the present invention exchanges information to and from an aircraft and includes a ground data link unit and a data store, which accumulates and stores data files that have been uploaded to the aircraft, and flight performance data ... | 12/19/2000 |
| 6163568 | Broadband, low power FM/FSK transceiver for wireless communications systems An FM/FSK Transceiver for a wireless communications interface is disclosed which employs an offset phase lock loop which is accelerated into phase lock by a sweep signal to avoid data degradation, and which includes a feed forward compensation to accommod... | 12/19/2000 |
| 6163861 | Error compensating method and apparatus and medium storing an error compensation program An object of the present invention is to improve the transmission efficiency and reduce circuit size in error compensating techniques where bit errors occurring during transmission are compensated for by retransmission. Transmission equipment get sequence... | 12/19/2000 |
| 6160839 | Adaptive weight update method for a discrete multitone spread spectrum communications system A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system by updating the spectral and/or spatial spreading weights at a rate that is determined by the measured qualit... | 12/12/2000 |
| 6160842 | Device and method for serially communicating A serial communication device (10) and a method for serially communicating. The serial communication device (10) has a first transceiver (11) and a second transceiver (12) that send data to each other. The first transceiver (11) is capable of providing po... | 12/12/2000 |
| 6160998 | Wireless spread spectrum ground link-based aircraft data communication system with approach data messaging download A system and method of the present invention provides a retrievable record of the flight performance of an aircraft and allows exchanging of data to and from an aircraft. A ground data link unit obtains flight performance data. A spread spectrum transceiv... | 12/12/2000 |
| 6157680 | Audio distortion canceler method and apparatus In a communications environment where it is desirable to allow the simultaneous transmission of digital data and conventional voice on a single communication line, an audio distortion canceler method and apparatus is configured to adaptively cancel the no... | 12/05/2000 |
| 6154637 | Wireless ground link-based aircraft data communication system with roaming feature A flight information communication system has a plurality of RF direct sequence spread spectrum ground data links that link respective aircraft-resident subsystems, in each of which a copy of its flight performance data is stored, with airport-located sub... | 11/28/2000 |
| 6154636 | System and method of providing OOOI times of an aircraft A method for determining the Out, Off, On, and In (OOOI) times for commercial air transport aircraft, based on parametric data routinely sampled and presented in a multiplexed data stream to the Flight Data Recorder. In a preferred embodiment, this method... | 11/28/2000 |
| 6154488 | Low frequency bilateral communication over distributed power lines A system and method for providing full-duplex data communications between an electric power distribution station and a power consumer via the power distribution line providing electric power is provided. A first information transmitter, coupled to the pow... | 11/28/2000 |
| 6141375 | Plural synthesizer controlling system for personal handyphone system and plural synthesizer controlling method A modem IC controls latch enable terminals LE1 and LE2 through which PLL frequency synthesizer IC1 and IC2 control writing of frequency set data, makes the write timing different between the PLL frequency synthesizer ICs to allow writing of the frequency ... | 10/31/2000 |
| 6137997 | Circuit for receiving and transmitting signals and method A circuit (30) and method for translating a spectrum of a modulated signal. The circuit (30) includes a mixer (33), a summing device (36), and a synthesizer (37). The circuit (30) receives and transmits modulated Radio Frequency (RF) signals. The synthesi... | 10/24/2000 |
| 6137828 | Radio remote interface for modulating/demodulating data in a digital communication system There is disclosed in a digital communications system for communicating between two radios by transceiving a signal comprising a first type control signal, a second type data traffic signal and a third type voice signal, a remote communication interface f... | 10/24/2000 |
| 6137827 | Isolation system with digital communication across a capacitive barrier An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal... | 10/24/2000 |
| 6130914 | Communications system A point to multipoint two-way communications systems in which a base station transmits to a remote station ("outstation") on a frequency derived by the base station from the frequency of a previous transmission received by said base station from said outs... | 10/10/2000 |
| 6125138 | Base station transmitter-receiver In a case where transmission and reception timing of a base station has not been synchronized to that of another base station in the vicinity, or in a case where it is necessary to establish such synchronization, a synchronous controller outputs a recepti... | 09/26/2000 |
| 6119016 | Synchronizing base stations in a wireless telecommunications system A technique for synchronizing the timing signals in the base stations of a wireless telecommunications system is disclosed. In accordance with the illustrative embodiment of the present invention, each base station derives the frequency of its timing sign... | 09/12/2000 |
| 6118810 | Multi-channel base station/terminal design covering complete system frequency range A transmitter/receiver basestation processing a plurality of channels in an RF band is disclosed. The transmitters and receivers of the present invention up-convert or down-convert the RF band as a whole, rather than on a channel-by-channel basis. After u... | 09/12/2000 |
