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8149155 |
Range measuring method, range measuring apparatus, non-contacted IC medium and range measuring system
A method of measuring a range from a reader unit to a non-contacted IC medium, includes: transmitting an inquiry signal at a first frequency from the reader unit to the non-contacted IC medium;...
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8090313 |
Method and system for frequency-shift based chip-to-chip communications
Aspects of a method and system for frequency-shift based chip-to-chip communications may include receiving and/or generating modulation control information and demodulation control information...
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8036607 |
Wireless terminal and wireless base station
In a case where a switching source wireless communication system is a wireless communication system in which a transmission timing of a packet or data rate can be controlled in a wireless base...
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8018914 |
Radio communication device, demodulation method, and frequency deflection correction circuit
A demodulation section 13 receives a TDMA-TDD based phase-modulated burst signal of mobile communications and demodulates the burst signal by a synchronous detection system (or a quasi-synchronous...
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7983213 |
Radio communication apparatus and method
In a radio communication apparatus having a plurality of transmitting and receiving functions that enable simultaneous signal transmission and reception, an arbitrary number of transmitting and...
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RE42261 |
Wireless communications systems and methods using satellite-linked remote terminal interface subsystems
A satellite gateway is coupled to a communications network and is operative to communicate with a communications satellite. A terrestrial terminal interface subsystem is operative to communicate...
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7890081 |
Direct frequency conversion demodulator and modulator-demodulator
The demodulator by direct frequency conversion comprises a vector addition device having: a first circuit (1) that furnishes, starting from a first AC signal (LO), a respective AC signal to n...
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7720022 |
Method and apparatus for maximizing the use of available capacity in a communication system
A method and apparatus for maximizing the use of available capacity in a communication system having a base station and a plurality of mobile stations. The forward link includes a plurality of...
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7634250 |
Signal conditioner and method for communicating over a shared transport medium a combined digital signal for wireless service
A signal conditioner (SC) and method for performing communications via a shared transport medium between a base transceiver station (BTS) and a remote antenna entity (RAE). A first SC is connected...
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7502429 |
Equalization for traveling wave tube amplifier nonlinearity measurements
A method and system provide the ability to measure a transmission performance characteristic. A signal is received and equalized. The equalized signal is demodulated and an ideal signal is...
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7502430 |
Coherent averaging for measuring traveling wave tube amplifier nonlinearity
A method and system provide the ability to measure a transmission performance characteristic. A signal is received and demodulated. An ideal signal is generated from the demodulated signal. The...
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7373104 |
Signal relay apparatus and method for a wireless network
A signal relaying apparatus includes a plurality of devices for relaying signals to and from distant nodes in a wireless communication network. At least one of the devices is an antenna; the...
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7336732 |
Carrier frequency detection for signal acquisition
A carrier frequency in a filtered received M-ary phase-shift keyed (MPSK) modulated signal having in-phase and quadrature components is detected by processing the filtered received signal to remove...
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7324475 |
Radio communication apparatus and method
In a radio communication apparatus having a plurality of transmitting and receiving functions that enable simultaneous signal transmission and reception, an arbitrary number of transmitting and...
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7299005 |
Radio frequency repeater with automated block/channel selection
A wireless repeater for receiving, amplifying and transmitting one or more wireless signals. The repeater comprises a signal processing device for determining one or more attributes of a wireless...
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7174140 |
RF system integrated with RF switch and RF modulation
An RF system integrated with an RF switching unit and an RF modulator unit. In accordance with the present invention, it is provided the RF system including a plurality of antenna, an RF unit and a...
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7099383 |
Apparatus and associated method for operating upon data signals received at a receiving station of a fixed wireless access communication system
Apparatus, and an associated method, for acting upon data signals received at a base station of a fixed wireless access communication system. A plurality of modems are positioned at the base...
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7069049 |
Apparatus and method for controlling duplication structure of base station transceiver subsystem in a mobile communication system
An apparatus and method for controlling a duplication structure of a Base station Transceiver Subsystem (BTS) is provided. The BTS has N number of sectors including a first sector to an Nth sector...
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7068734 |
Passive redundant digital data receiver with schmitt-trigger
A passive coupling structure constructed using printed circuit board traces is used to separate the low and high frequency components of an incoming digital signal. The low and high frequency...
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7031655 |
Transmission system and coding communication method for a transmission system
The conventional combination cannot realize an efficient road traffic system as a whole. A transmission system has a plurality of modules installed at different positions along a predetermined...
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6980823 |
Intermediate wake mode to track sleep clock frequency in a wireless communication device
Various techniques for improving a wireless communication device are described. The techniques may include reducing power in a wireless communication device for a first sleep period and then...
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6873823 |
Repeater with digital channelizer
In order to retransmit a communication channel at a specific frequency, a receiver may receive a signal including the communication channel's specific frequency. An analog to digital converter may...
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6865390 |
Cellular communications system featuring a central radio pool/traffic router
The present invention provides a cellular communication system that includes a central radio pool/traffic router (CRP/TR) that sends control and traffic signals over fiber optic transmission links...
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6823178 |
High-speed point-to-point modem-less microwave radio frequency link using direct frequency modulation
A point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode using direct digital modulation with a Continuous Phase-Frequency Shift Keyed (CP-FSK) scheme. The...
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6745005 |
Method and apparatus for reducing signal interference in satellite broadcast systems employing terrestrial repeater stations
A method and apparatus for reducing deep fading of signals in satellite-based communications systems employing terrestrial repeater stations by shifting the phase of the signals transmitted from...
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6243560 |
Latency reduction in satellite communication systems
The present method for reducing latency in satellite communication includes the steps of applying, at a first earth terminal, a discriminator to user data. The discriminator delineates action data...
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6157811 |
Cellular/satellite communications system with improved frequency re-use
Radiocommunication systems and methods for minimizing co-channel interference are disclosed. The systems and methods are applicable to, for example, landmobile communications, satellite...
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6115581 |
Apparatus for communication using multiple radio processing modules
Apparatus for communication using multiple radio processing modules is disclosed herein. The apparatus for communication mentioned above receives a first radio signal and a second radio signal from...
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6108517 |
Methods and apparatus for joint demodulation of adjacent channel signals in digital communications systems
Methods and apparatus for receiving adjacent channel signals wherein adjacent channel interference effects are minimized through joint demodulation of the adjacent channel signals. A channel...
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6078787 |
Antenna system
An antenna system (100) at a mobile communication station (150) comprises a main unit (101) which comprises at least one network antenna (102), a relay antenna (103) for communication with the...
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5963847 |
Booster system
A booster system for transmitting a received wave after amplifying it comprises a receiving antenna section, a carrier combining section, a transmitting section, a transmitting antenna section and...
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5903592 |
Radio transmission system
A radio transmission system is provided which includes a master station and a plurality of series connected substations connected to the master station via a radio channel. First receiving unit...
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5890055 |
Method and system for connecting cells and microcells in a wireless communications network
A wireless communications system includes a number of clusters of repeaters wherein all repeaters within a cluster arc connected to a common hub via respective millimeter-wave radio links. Wireless...
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5774789 |
RF communication signal distribution system and method
A system and method for distribution of RF communication signals. First RF communication signals are downconverted in a first signal processing subsystem and transmitted to a second signal...
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5734962 |
Satellite communications system utilizing parallel concatenated coding
A VSAT satellite communications network utilizes parallel concatenated coding on its inbound or outbound links, or both. For short data blocks, nonrecursive systematic tail-biting convolutional...
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5719619 |
Bidirectional broadcasting method, bidirectional broadcasting system and receiver apparatus for bidirectional broadcast
A bidirectional broadcasting method and system allows, even when an existing telephone voting service is used to respond to a bidirectional broadcast, broadcasting wherein a plurality of questions...
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5634191 |
Self-adjusting RF repeater arrangements for wireless telephone systems
An RF repeater arrangement for exchanging transmit and receive signals between a handset and a base station in a wireless telephone system automatically compensates for attenuation losses. The RF...
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5485464 |
Communication protocol for a high data rate satellite communication system
A communication protocol or method that provides for terminal access, data flow, call monitoring and terminal polling, and call termination between user terminals connected to a high data rate...
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5455960 |
Low-power access technique for certain satellite transponders
A satellite communications scheme for enhancing the communications system with existing satellites is disclosed. The existing satellites include a transponder having a phase locked loop phase...
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5416449 |
Modulator with harmonic mixers
An improved modulator circuit for mixing a modulation signal with a carrier signal includes first and second harmonic mixers which are operative to produce modulated output signals at an output...
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5351270 |
Portable cellular telephone using spread spectrum communication with mobile transceiver
A portable cellular telephone system including a stationary transceiver for radio communication with a plurality of mobile transceivers within a geographic cell, a mobile transceiver within said...
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5349463 |
Optical radio repeater with signal quality detection
An optical radio system includes a host device, an end device, and a repeater. The host device and the end device communicate with each other via the repeater by use of optical radio. The repeater...
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5301355 |
Modulated signal transmitting apparatus
An infrared remote control signal is entered into a receiving circuit where it is converted into an electrical, modulated signal made up of a carrier and a command signal. The modulated input...
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5020131 |
Transponder frequency offset compensation with recurrently assigned unique words
In a satellite communications system, satellite channels are divided into groups of successively adjacent channels which are covered by a range of frequency drifts caused by a satellite transponder...
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4972346 |
High-frequency signal booster
A high-frequency signal booster which has at least one channel unit including a down-converter for converting input signals into intermediate-frequency signals and an up-converter for converting...
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4829588 |
Automatic retransmission with pilot tone
A transceiver and method of controlling the automatic retransmission of a radio frequency commmunications signal in which a pilot tone within the radio frequency communications channel bandwidth...
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4733223 |
Apparatus for monitoring a communications system
Apparatus for monitoring the status of and controlling faults at remotely-located components in a single line communications system wherein return data signals from the components are transmitted...
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4701935 |
One frequency repeater for a digital microwave radio system with cancellation of transmitter-to-receiver interference
A digital microwave radio repeater using the same carrier frequency for the transmitter and the receiver carriers for improving the frequency utilization efficiency. The transmitter-to-receiver...
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4682368 |
Mobile radio data communication system using a speech recognition technique
A mobile radio data communication system wherein a fixed unit transmits an operation command code sequence for an instruction to an operator having a portable unit. A speech synthesizer of the...
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4656252 |
Amidobiotin compounds useful in a avidin-biotin multiple layering process
Amidobiotin extender compounds useful, for example, in avidin-biotin multiple-layering process, which compounds include caproylamidobiotin-NHS ester, caproylamidobiotin-horse radish peroxidase,...
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